Peer Reviewed International Journal Publications:

    2026
  1. Sharma S.; Bhardwaj A.; Upadhyayula S.; Data-driven design of catalysts for CO2 hydrogenation to formic acid/formate: Toward sustainable hydrogen carrier and greener fuel; Fuel, 2026, 407, 137331
  2. Tyagi N.; Banerjee D.; Upadhyayula S.; Kumar U.; Recent Advances in Ni-MOF-Based Photocatalytic Water Splitting for Hydrogen Production: Progresses, Challenges, and Perspectives; ChemistrySelect, 2026, 11:e07034
    3. 2025
  3. Sardar P.; Manna R.; Bhattacharya G.; Raj S.; Yadav S.; Upadhyayula S., Samanta A.N.; Enhanced CO2 adsorption efficiency through aminoethylethanolamine functionalized porous ZIF-8 nanoparticles: Experimental investigations, isotherm and RSM modelling; Separation & Purification Technology, 2025, 360, 131090
  4. Pandey V.; Singh P.P.; Pant K.K.; Upadhyayula S.; Sengupta S.; Promotional role of methanol and CO2 in carbon dioxide-rich syngas hydrogenation over slurry reactor utilizing combustion induced Cu-based catalysts; Materials Today Sustainability, 2025, 29, 101082
  5. Rafey A.; Ahmad E.; Pant K.K.; Upadhyayula S.; Transforming Plastic Waste into Hydrogen and Nanocarbon: A Sustainable Path to Clean Energy and a Circular Economy; Industrial & Engineering Chemistry Research, 2025, 64 (7), 3651-3675
  6. Niaze A.A.; Sunkara M.; Upadhyayula S.; A review on the advancements in chemocatalytic approach for efficient cellulosic ethanol production; Biomass Conversion and Biorefinery, 2025, 15, 16343–16365
  7. Singh C.; Jha C.B.; Anand A.; Kohli E.; Manav N.; Varshney R.; Upadhyayula S.; Mathur R.; Copper based Metal Organic Framework as a Potential Therapeutic Gas Carrier: Optimization, Synthesis, Characterization and Computational Study; ACS Applied Bio Materials, 2025, 8 (3), 2440-2458
  8. Niaze A.A.; Sunkara M.; Upadhyayula S.; Cellulose Hydrogenolysis on a Combination of Tungsten Oxide Nanorods with and without Ruthenium Loading for enhanced Ethanol Selectivity; Sustainable Energy & Fuels, 2025, 9, 3055-3067
  9. Niaze A.A.; Sharma A.; Ghosh R.; Upadhyayula S.; A Data-Driven Approach for the Comprehensive Analysis of Process Parameter Effects on Industrial Methane Production; Biochemical Engineering Journal, 2025, 222, 109828
  10. Pandey V.; Singh P.P.; Bhardwaj A.; Pant K.K.; Upadhyayula S.; Sengupta S.; Low-temperature methanol-assisted CO2 hydrogenation populates intermediates over a Ce-promoted Cu/ZnO/MgO catalyst in a three-phase slurry reactor; Sustainable Energy & Fuels, 2025, 9 (18), 4889-4893
  11. Sahoo S.S.; Tiwari S.C.; Upadhyayula S.; Integrated CO2 Capture and Mineralization Process Using Ionic Liquids and Industrial Amine Absorbents: Optimization and Comparative Analysis; Energy & Fuels, 2025, 39 (33), 15775-15791
  12. Banerjee D.; Sahu A.K.; Rajan A.; Singh A.; Varghese J.J.; Clegg J.K.;Upadhyayula S.; Reductive transfer hydrogenation of furfural to 2-methylfuran over a Re-assisted Cu catalyst; Chemical Engineering Journal, 2025, 169866
  13. Tiwari S.C.; Pandey V.; Pant K.K.; Upadhyayula S.; Synergistic CO2 Capture Using Dual‐Functionalized Ionic Liquids and MDEA: Performance, Binding Mechanism, and Economic Assessment; Energy Technology, 2025, 13 (11), 2500439
  14. 2024
  15. Pathak. S; Bhumla P.; Bahri S.; Upadhyayula S.; Bhattacharya S.; O-Vacancy Mediated Partially Inverted Ferrospinels for Enhanced Activity in the Sulfuric Acid Decomposition for Hydrogen Production; Physical Chemistry Letters, 2024, 15 (1), 97-104
  16. Sahu A.K.; Yadav S.; Banerjee D.; Rufford T.E.; Upadhyayula S.; Accelerating Charge Separation and CO2 Photoreduction in Aqueous Phase under Visible Light with Ru Nanoparticles Loaded on Ga-Doped NiTiO3 in a Batch Photoreactor; ACS Applied Materials and Interfaces, 2024, 16 (6), 7057-7069
  17. Tiwari S.C.; Pant K.K.; Upadhyayula S.; Kinetics study and modeling of CO2 capture in new class dual functionalized ionic liquids blend methyl diethanolamine absorbents; Industrial & Engineering Chemistry Research, 2024, 63 (17), 7578-7592
  18. Sahu A.K.; Pokhriyal M.; Banerjee D.; Rufford T.E.; Upadhyayula S.; An indirect Z-scheme heterostructure of nano-gold layer immobilized Cu-Al-doped SrTiO3 and CoOx-WO3 for photocatalytic CO2 reduction; Chemical Engineering Journal, 2024, 487, 150716
  19. Tiwari S.C.; Pant K.K.; Upadhyayula S.; CO2 Absorption in Dual Functionalized Ionic Liquids Blend N-Methyl diethanolamine Aqueous System – A Thermodynamics Study; Energy & Fuels, 2024, 38 (8), 7121-7136
  20. Banerjee D.; Yadav S.; Sahu A.K.; Clegg J.K.; Upadhyayula S.; Transfer hydrogenation of furfural to 2-methylfuran over a Cu-BTC-derived catalyst with isopropanol as a hydrogen donor; Energy & Fuels, 2024, 38 (11), 9814-9826
  21. Pokhriyal M.; Bhardwaj A.; Pandey V.; Pant K.K.; Upadhyayula S.; Enhanced Methanol Formation over Cu/MgO catalyst derived from Mg-Rich Active Hydroxycarbonate Precursor; ACS Applied Energy Materials, 2024, 7 (12), 5163-5178
  22. Banerjee D.; Sahu A.K.; Clegg J.K.; Upadhyayula S.; Recent advances in 2-methylfuran production via catalytic transfer hydrogenation of biomass-derived furfural; Chemical Engineering Journal, 2024, 493, 152552
  23. Gautam R.; Upadhyayula S.; A comprehensive review on recent breakthroughs in hydrogen production from hydrogen sulfide decomposition: harnessing the power of plasma; Renewable & Sustainable Energy Reviews, 2024, 202, 114735
  24. Singh C.; Jha C.B.; Upadhyayula S.; Mathur R.; Oxygen Gas-Filled Metal-Organic Frameworks (MOFs) Delivery System: A Hypothetical Design for Injectable Oxygen; Medical Hypothesis, 2024, 192, 111489
  25. Ahmadi M.; Noudari A.; Jasinski J.; Upadhyayula S.; Satyavolu J.; Sunkara M.; Functionalized Carbons and Pt/C catalysts from Biomass Using a Plasma Process; Chemical Engineering Journal, 2024, 498, 155600
    2023
  26. Kumar A.; Pant K.K.; Upadhyayula S.; Kodamana H. ; Multiobjective Bayesian Optimization Framework for the Synthesis of Methanol from Syngas Using Interpretable Gaussian Process Models; ACS Omega 2023, 8 (1), 410–421
  27. Pandey V.; Pant K.K.; Upadhyayula S.; Combustion induced synthesis of multicomponent Cu-based catalysts for autocatalytic CO hydrogenation to methanol in a three-phase reactor system; React. Chem. Eng., 2023, 8, 442-454
  28. Bahri S.; Pathak S.; Upadhyayula S.; Transient HCO/HCOO− species formation during Fischer–Tropsch over an Fe–Co spinel using low Ribblet ratio syngas: a combined operando IR and kinetic study; Sustainable Energy Fuels, 2023, 7, 708-726
  29. Kumar K.; Pathak S.; Rajora A.K.; Halog A.; Upadhyayula S.; Kinetic and thermodynamic studies of HMF-ester synthesis using Brønsted–Lewis acidic ionic liquid catalyst; RSC Sustainability, 2023, 1 (2), 282-293
  30. Tomar S.; Upadhyayula S.; Highly active and stable copper ferrite supported on β–SiC foam for decomposition of SO3 in the Sulfur–Iodine cycle for H2 production; International Journal of Hydrogen Energy, 2023, 48 (35), 13068-13080
  31. Pandey V.; Singh R.; Pant K.K.; Upadhyayula S.; Experimental and theoretical study unveiling the role of solvents on CO activation and hydrogenation to methanol in three-phase reactor system; Journal of Molecular Structure, 2023, 1274, 134392
  32. Sahu A.K.;Zhao X.S.; Upadhyayula S.; Ceria-based photocatalysts in water-splitting for hydrogen production and carbon dioxide reduction; Catalysis Reviews, 2023, 1-78
  33. Tripathi K.; Gupta V.; Awasthi V.; Pant K.k.; Upadhyayula S.; Forecasting Catalytic Property‐Performance Correlations for CO2 Hydrogenation to Methanol via Surrogate Machine Learning Framework; Advanced Sustainable Systems, 2023, 7 (3), 2200416
  34. Ahmad K.; M Abi Jaoude; Upadhyayula S.; Polychronopoulou; Ravaux F.; Kinetics of greenhouse gas CO2 hydrogenation over K-promoted Cu/ZnO/Cr2O3 catalyst towards sustainable aviation fuel production; Fuel, 2023, 337, 127250
  35. Niaze A.; Bhardwaj A.; Sunkara M.; Upadhyayula S.; Promotional role of tungstate in the integrated synthesis of C2 and C3 alcohols and understanding the bond functionality for a series of cascade reactions; Biofuels, Bioproducts and Biorefining, 2023, 17 (5), 1183-1202
  36. Tiwari S.C.; Pant K.K.; Upadhyayula S.; Energy Efficient CO2 Capture in Dual Functionalized Ionic Liquids and N-Methyldiethanolamine Solvent Blend System at Elevated Pressures: Interaction Mechanism and Heat Duties; Journal of Molecular Liquids, 2023, 383, 122109
  37. Tripathi K.; Gupta V.; Awasthi V.; Pant K.K.; Upadhyayula S.; Design Framework for DME Production from Coal and Biomass Derived Syngas via Simulation Approach; Canadian Journal of Chemical Engineering, 2023, 101 (6), 3213-3225
  38. Makhania M.; Upadhyayula S.; Diffusion and Reaction in Foam-Based Catalysts: Effectiveness Factor Expressions for LHHW, Non-isothermal and General Order Kinetics; Industrial & Engineering Chemistry Research, 2023, 62 (41), 16660-16667
  39. Pandey V.; Singh R.; Pant K.K.; Upadhyayula S.; Combustion induced synthesis of multicomponent Cu-based catalysts for autocatalytic CO hydrogenation to methanol in a three-phase reactor system; Reaction Chemistry & Engineering, 2023, 8, 442-454
  40. Niaze A.; Dhaker D.; Upadhyayula S.; A Meta-analysis of Catalytic Hydrogenation of Levulinic acid (LA) to Gamma-Valerolactone (GVL); ChemBioEngg Reviews, 2023, 10 (4), 399-411
  41. Pathak. S; Upadhyayula S.; Insights into the stability of the silica-based core-shell catalysts in high-temperature reaction of the Iodine-Sulfur cycle for hydrogen production; Reaction Kinetics, Mechanisms & Catalysis, 2023, 136, 2977-2996
  42. Niaze A.; Sahu R.; Upadhyayula S.; Model construction and optimization for raising the concentration of industrial bioethanol in the product using a data-driven ANN model; Renewable Energy, 2023, 216, 119031
  43. Bhardwaj A.; Ahluwali A.S.; Pant K.K.; Upadhyayyula S.; A principal component analysis assisted machine learning modeling and validation of methanol formation over Cu-based catalysts in direct CO2 hydrogenation; Separation and Purification Technology, 2023, 324, 124576
  44. Das R.K.; Voolapalli R.; Upadhyayula S.; Kumar R.; Novel structural aspects of heavy-crude-derived asphaltene molecules for investigating the crude mix processability in refinery operation; Society for Petroleum Engineers Journal, 2023, 29 (3), 1510–1527
  45. Tiwari S.C.; Agarwal M.; Pant K.K.; Upadhyayula S.; A comparative study of polyamine and piperazine as promoter for CO2 absorption performance in aqueous methyl diethanolamine blend system: 430 MW power plant data simulation and economic assessment; Sustainable Chemistry for the Environment, 2023, 4, 100054
    46. 2022
  46. Bahri S.; Pathak S.; Singhahluwalia A.; Malav P.; Upadhyayula S.; Meta-analysis approach for understanding the characteristics of CO2 reduction catalysts for renewable fuel production; Journal of Cleaner Production, 2022, 339, 130653
  47. Makhania M.; Upadhyayula S.; Diffusion and reaction in foam-based catalysts: Identifying the shape factor; Chemical Engineering Science, 2022, 250, 117381.
  48. Tripathi K.; Gupta V.; Pant K.K.; Upadhyayula S.; Deciphering Mn modulated structure-activity interplay and rational statistical analysis for CO2 rich syngas hydrogenation to clean methanol; Journal of Cleaner Production, 2022, 340, 130794.
  49. Kumar R.; Chebrolu H.; Voolapalli R.K.; Upadhyayula S.; Kondamana H; A solvent deasphalting dearomatization (SD-A2) process for heavy oil upgradation; Fuel, 2022, 307, 121923.
  50. Tomar S.; Gill D.; Kondamudi K.; Upadhyayula S. ; S Bhattacharya; SO3 decomposition over silica-modified β-SiC supported CuFe2O4 catalyst: characterization, performance, and atomistic insights; Nanoscale, 2022, 14, 6876-6887.
  51. Tomar S.; Upadhyayula S.; Effect of feed impurities on catalytic performance of CuFe2O4/β-SiC for SO3 decomposition in the sulfur–iodine cycle; Catalysis Science & Technology, 2022, 12, 4066-4073.
  52. ChamoliS.;Upadhyayula S. , F Parveen; Biofuels and Fine Chemicals From Lignocellulosic Biomass: A Sustainable and Circular Economy; Handbook of Biomass Valorization for Industrial Applications, 2022, 41-53
  53. Sagar A.; Upadhyayula S.; Implementation of Artificial Neural Networks in the assessment of CO2 solubility in deep eutectic and ionic liquid solvents–Performance and cost comparison; Sustainable Chemistry for Climate Action, 2022, 1, 100007
  54. Pathak S; Upadhyayula S.; A review on the development of supported non-noble metal catalysts for the endothermic high temperature sulfuric acid decomposition step in the Iodine–Sulfur cycle; International Journal of Hydrogen Energy, 2022, 47, 31, 14186-14210
  55. Tiwari S.C.; Bhardwaj A.; Nigam K.D.P., Pant K.K., Upadhyayula S.; A strategy of development and selection of absorbent for efficient CO2 capture: An overview of properties and performance; Process Safety and Environmental Protection, 2022, 163, 244-273
  56. Sahu A.K.; Pokhriyal M.; Upadhyayula S.; Zhao X.S.; Modulating Charge Carrier Dynamics among Anisotropic Crystal Facets of Cu2O for Enhanced CO2 Photoreduction; The Journal of Physical Chemistry C, 2022, 126 (31), 13094-13104
  57. Parveen F.; Upadhyayula S. ; Thermochemical Property Predictions in Biomass Transformation to Fuel Components and Value-added Chemicals; New Energy Exploitation and Application, 2022, 1 (3), 1-10
  58. Singh C.; Jha C.B.; Kumar N.; Singh R.; Ojha H.; Upadhyayula S. , Varshney R.; Mathur R.; An integrated experimental and simulation study on the loading of cytarabine in a biocompatible zinc imidazole metal–organic framework; Journal of Materials Science, 2022, 57 (39), 18561-18577
  59. Makhania M.; Upadhyayula S. ; Foam: Imparting Structure to Heterogeneous Catalysis; ChemBioEng Reviews, 2022
    2021
  60. Afreen G.; Upadhyayula S.; Alkylation of phenol and substituted phenols with C1–C4 alcohols/olefins as an upgrading route for bio-oil oxygenates: A review; Renewable and Sustainable Energy Reviews, 2021, 147, 111189.
  61. Pathak S.; Upadhyayula S.; High temperature sulfuric acid decomposition in iodine-sulfur process-thermodynamics, concentrator and reactor, product separation, materials, and energy analysis; International Journal of Hydrogen Energy, 2021, 46, 34148.
  62. Roy A.; Dhawan H.; Upadhyayula S.; Kondamana H; Insights from Principal Component Analysis applied to the Py-GCMS study of Indian coals and their solvent extracted clean coal products; Intenational Journal of Coal Science & Technology, 2021, 395.
  63. Kumar R.; Maheshwari S.; Voolapalli R.K.; Upadhyayula S.; Investigation into Physical Parameters of Crude Oils and Their Impact on Kinematic Viscosity of Vacuum Residue and Heavy Product Blends for Crude Oil Selection; Journal of the Taiwan Institute of Chemical Engineers, 2021, 125, 33.
  64. Kumar K.; Pathak S.; Upadhyayula S.; Acetalization of 5-hydroxymethyl furfural into biofuel additive cyclic acetal using protic ionic liquid catalyst- A Thermodynamic and kinetic analysis; Renewable Energy, 2021, 167, 282.
  65. Ahmed K.;Upadhyayula S.; Deactivation behaviour of intermetallic Ga‐Ni catalyst in CO2 hydrogenation to methanol; Greenhouse Gases: Science and Technology, 2021.
  66. Afreen G.;Lara-Ramos J.A.; Vidwans N.A.; Atla V.; Kumar V.; Vaddiraju S.; Machuca-Martinez F.; Sunkara M.K.; Upadhyayula S.; Bulk production of porous TiO2 nanowires by unique solvo-plasma oxidation approach for combating biotic and abiotic water contaminants; Journal of Materials Science: Materials in Electronics, 2021,1.
  67. Joshi A.N.;Upadhyayula S.; Catalysts and Reactors for Synthesis Gas Production via Dry Reforming of Methane: A Review assisted with DWSIM Simulation; Science Academique, 2021,2(1), 1.
  68. Tripathi K.; Asthana S.; Singh S.; Pant K.K.; Upadhyayula S.; Origin of MnO induced synergy for tuning active Cu0/Cu+ surface centers for DME production via CO2 rich syngas conversion; Sustainable Energy and Fuels, 2021, 5, 2781.
  69. Nambo A.; Atla V.; Vasireddy S.; Kumar V.; Jasinski J.B.;Upadhyayula S.; Sunkara M.; Nanowire-Based Materials as Coke-Resistant Catalyst Supports for Dry Methane Reforming; Catalysts, 2021, 11, 175.
  70. Kumar K.; Kumar M.; Upadhyayula S.;Catalytic Conversion of Glucose into Levulinic Acid Using 2-Phenyl-2-Imidazoline Based Ionic Liquid Catalyst; Molecules, 2021, 26, 348.
  71. Niaze A.; Devi A.; Ramteke M.; Upadhyayula S.; Techno-Economic Analysis of Ethanol Production from Lignocellulosic Biomass – A comparison of Fermentation, Thermo Catalytic, and Chemocatalytic Technologies; Bioprocess and Biosystem Engineering, 2021, 44, 1093.
  72. Tiwari S.C.; Pant K.K.; Upadhyayula S., Efficient CO2 absorption in aqueous dual functionalized cyclic ionic liquids; Journal of CO2 Utilization, 2021, 45, 101416.
  73. Kumar K.; Khatri V.; Upadhyayula S.; Kashyap H., Cellulose conversion to biofuel precursors using conjugated ionic liquid catalyst: An experimental and DFT study; Applied Catalysis A: General, 2021, 610, 117951.
  74. Kumar K.; Pathak S.; Upadhyayula S., Acetalization of 5-hydroxymethyl furfural into biofuel additive cyclic acetal using protic ionic liquid catalyst- A Thermodynamic and kinetic analysis; Renewable Energy, 2021, 167, 282.
  75. Pathak S.; Saini S.; Kondamudi K.; Upadhyayula S.; Bhattacharya S., Insights into enhanced stability and activity of silica modified SiC supported iron oxide catalyst in sulfuric acid decomposition; Applied Catalysis B:Environmental, 2021, 284, 119613.
  76. Mittal S.; Pathak S.; Dhawan H.; Upadhyayula S.; A Machine Learning Approach to Improve Ignition Properties of High-ash Indian Coals by Solvent Extraction and Coal Blending; Accepted in Chemical Engineering Journal.
  77. Bahri, S.; Basak, U.; Upadhyayula, S.; Rational design of process parameters for carbon-neutral and sulfur-free motor fuel production from second-generation biomass generated syngas; Journal of Cleaner Production, 2021, 279, 123559.
    78. 2020
  78. Pandian, E.;Selvanarayanan,R.;Upadhyayula, S.; Kinetics of phenol alkylation with tert-butyl alcohol using supported ionic liquid catalyst, Chemical Engineerig Journal Advances, 2020, 4, 100045.
  79. Dhawan, H.; Upadhyayula, S.; Sharma D.K.; Production of near Zero ash coal through ionic liquid promoted organo-refining process; Separation Science and Technology, 2020, 55, 3228–3241.
  80. Tomar, S.; Gangwar, S.; Kondamoudi, S.; Upadhyayula, S.; SO3 decomposition over β–SiC and SiO2 supported CuFe2O4: A stability and kinetic study; International Journal of Hydrogen Energy, 2020, 45, 21287-21296.
  81. Ahmad, K.; Upadhyayula, S.; Selective conversion of CO2 to methanol over intermetallic Ga-Ni catalyst: Microkinetic modeling; Fuel, 2020, 278,118296.
  82. Sonal; Pant, K. K.; Upadhyayula, S.; An insight into the promotional effect on Fe-Co bimetallic catalyst in the Fischer Tropsch reaction: A DRIFTS study; Fuel, 2020, 276, 118044.
  83. Afreen, G.; Pathak, S.; Upadhyayula, S.; Gas phase alkylation of biomass-derived m-cresol with iso-propanol over zinc modified HY zeolite: Elucidating reaction mechanism and kinetics including deactivation; Chemical Engineering Journal, 2020, 400, 125824.
  84. Afreen, G.; Shoeb, M.; Upadhyayula, S.;Effectiveness of reactive oxygen species generated from rGO/CdS QD heterostructure for photodegradation and disinfection of pollutants in waste water;Materials Science & Engineering C, 2020, 108, 110372.
  85. Afreen, G.; Mittal, D.; Upadhyayula, S.; Biomass-derived phenolics conversion to C10-C13 range fuel precursors over metal ion-exchanged zeolites: Physicochemical characterization of catalysts and process parameter optimization; Renewable Energy, 149, 489-507. Link
  86. Bahri, S.; Upadhyayula, S.; Experimental investigations on olefin to paraffin ratio in Fischer-Tropsch products using syngas of low Ribblet ratio; Catalysis Today, 2020,348, 55-62 . Link
  87. Ahmad, K.; Upadhyayula, S.; Kinetics of CO2 hydrogenation to methanol over silica supported intermetallic Ga3Ni5 catalyst in a continuous differential fixed bed reactor; International Journal of Hydrogen Energy, 2020, 45,1140-1150.
  88. Rakshit, P.; Pathak, S.; Upadhyayula, S.; Thermodynamic Analysis, Kinetics Modeling, and Reactor Model Development for Acetic Acid Hydrogenation Reaction over Bimetallic Pt–Sn Catalyst; Energy & Fuels, 2020, 34, 3640-3648.
  89. Komal, K.; Pathak, S.; Upadhyayula, S.; Thermodynamic Analysis, 2nd generation biomass derived glucose conversion to 5-hydroxymethylfurfural and levulinic acid catalyzed by ionic liquid and transition metal sulfate: Elucidation of kinetics and mechanism; Journal of Cleaner Production, 2020, 256, 120292.
  90. Komal, K.; Khatri, V.; Parveen,F.; Kashyap, H.; Upadhyayula, S.; Synthesis of an oxygenated fuel additive from a waste biomass derived aldehyde using a green catalyst: an experimental and DFT study; Sustainable Energy & Fuels, 2020, 4, 2924-2936.
  91. Dhawan, H.; Kumar, R.; Pant,K.K.; Upadhyayula, S.; Sharma, D.K.; Fractionation of coal through organo-separative refining for enhancing its potential for the CO2-Gasification ; Journal of Coal Science and Technology , 2020.
    92. 2019
  92. Afreen, G.; Upadhyayula, S.; Mechanistic insights into upgrading of biomass-derived phenolic compounds: Comparative study of the impact of Lewis acidity in Zn loaded FAU zeolite on reaction mechanism; Chemical Engineering Journal, 2019, 377, 120236.
  93. Afreen, G.; Sunkara, M.; Upadhyayula, S.; TiO2 Nanowires as Efficient Heterogeneous Photocatalysts for Waste-Water Treatment, International Journal of Chemical and Molecular Engineering 2019, 13, 511-515.
  94. Pathak, S.;Goswami, A.; Upadhyayula, S.; Kinetic modelling and simulation of catalyst pellet in the high-temperature sulfuric acid decomposition section of Iodine-Sulfur process, International Journal of Hydrogen Energy, Vol. 44, Issue 59, 29 November 2019, Pages 30850-30864.
  95. Ahmad, K.; Upadhyayula, S.; Kinetics of CO2 hydrogenation to methanol over silica supported intermetallic Ga3Ni5 catalyst in a continuous differential fixed bed reactor, International Journal of Hydrogen Energy. (Article in press)
  96. Kumar, K.; Pathak, S. ; Upadhyayula, S.; Levulinic acid and 5-hydroxymethylfurfural production from glucose catalyzed by green ionic liquid and transition metal sulfate as co-catalyst: Kinetics and Mechanism; Journal of Cleaner Production (Just accepted).
  97. Sonal; Ahmad, E.; Pant, K. K.; Upadhyayula, S.; Biomass-derived CO2 rich syngas conversion to higher hydrocarbon via Fischer-Tropsch process over Fe-Co bimetallic catalyst; International Journal of Hydrogen Energy (Just Accepted). Link
  98. Bahri, S.; Venezia, A.M. ; Upadhyayula, S.; Utilization of greenhouse gas carbon dioxide for cleaner Fischer-Tropsch diesel production; Journal of Cleaner Production; 228 (2019), 1013-1024. Link
  99. Bahri, S.; Patra, P.; Sonal; Upadhyayula, S. Synergistic effect of bifunctional mesoporous ZSM-5 supported Fe-Co catalyst for selective conversion of syngas with low Ribblet ratio into synthetic fuel, Microporous and Mesoporous Materials, 2019, 275, 1. Link
  100. Sonal; Pant, K.K.; Upadhyayula, S. Detailed kinetics of Fischer Tropsch synthesis over Fe-Co bimetallic catalyst considering chain length dependent olefin desorption, Fuel, 2019, 236, 1263. Link
  101. Bandyopadhyay, R.; Alkilde, O. F.; Upadhyayula, S.; Applying pinch and exergy analysis for energy efficient design of diesel hydrotreating unit; Journal of Cleaner Production; 232 (2019); 337-349. Link
  102. Afreen, G.; Upadhyayula, S.; Disruption of the Faujasite framework by incorporation of zinc and their effect on thymol formation, Materials Letters; 254(2019), 320-323. Link
  103. Pathak, S.; Dwivedi, S.; Upadhyayula, S.; Framework development and modeling of the thermodynamics for aqueous sulfuric acid decomposition; Journal of Molecular Liquids; 291 (2019),111215. Link
  104. Ahmad, K.; Upadhyayula, S.; Influence of reduction temperature on the formation of intermetallic Pd2Ga phase and its catalytic activity in CO2 hydrogenation to methanol; Greenhouse Gases: Science and Technology; 9 (2019); 529-538. Link
  105. Ahmad, K.; Upadhyayula, S.; Conversion of the greenhouse gas CO2 to methanol over supported intermetallic Ga–Ni catalysts at atmospheric pressure: thermodynamic modeling and experimental study; Sustainable Energy & Fuels; 3 (2019); 2509-2520. Link
  106. Ahmad, K.; Upadhyayula, S.; Greenhouse gas CO2 hydrogenation to fuels: A thermodynamic analysis; Environmental Progress & Sustainable Energy; 38 (2019); 98-111. Link
  107. Tomar, S; Pareek, A; Kondamudi,K; Upadhyayula, S.; Evaluation of materials of construction for the sulfuric acid decomposition section in the sulfur-iodine (S-I) cycle for hydrogen production: Some preliminary studies on selected materials; Journal of Chemical Sciences. (Article in Press) Link
    108. 2018
  108. Rakshit, P. K.; Volapalli, R. K.; Upadhyayula, S. Acetic acid hydrogenation to ethanol over supported Pt-Sn catalyst: Effect of Bronsted acidity on product selectivity, Molecular Catalysis, 2018, 448, 78. Link
  109. Dhawan, H. K.; Upadhyayula, S. Sharma, D. K. Design of experiments to optimize the extraction parameters of a power grade Indian coal, International Journal of Coal Science & Technology, 2018, 5, 417. Link
  110. Kumar, K.; Dhaiya, A., Patra, T.; Upadhyayula, S. Upgrading of HMF and Biomass-Derived Acids into HMF Esters Using Bifunctional Ionic Liquid Catalysts under Solvent Free Conditions, Chemistry Select, 2018, 3, 6242. Link
  111. Parveen, F.; Jaiswal, M. ; Upadhyayula, S. Effect of linkers (aliphatic/ aromatic) and anions on the activity of sulfonic acid functionalized ionic liquids towards catalyzing the hydrolysis of microcrystalline cellulose- an experimental and theoretical study, Renewable Energy, 2018, 121, 590. Link
  112. Rajeev, K., P. K.; Volapalli, R. K.; Upadhyayula, S. Prediction of crude oil blends compatibility and blend optimization for increasing heavy oil processing, Fuel Processing Technology, 2018, 177, 309. Link
  113. Pradeep, K. B.; Singh, K. A.; Upadhyayula, S. Non-oxidative methane dehydroaromatization reaction over highly active a - MoC1-x ZSM-5 derived from pretreatment, Journal of Chemical Sciences, 2018, 130, 27. Link
  114. Dhawan, H. K.; Upadhyayula, S. Sharma, D. K. Organo-Refining To Produce Near Zero Ash Coals: Determination of Elemental Concentration in Clean Coals, Energy & Fuels, 2018, 35, 6535. Link
  115. Patra, T.; Afreen, G.; Parveen, F.;Kumar, K.; Bahri, S,; Upadhyayula, S. Synergistic Bronsted-Lewis Acidity Effect on Upgrading Biomass-Derived Phenolic Compounds: Statistical Optimization of Process Parameters, Kinetic Investigations and DFT Study, Chemistry Select, 2018, 3, 634. Link
  116. Ahmad, K.; Upadhyayula, S. Greenhouse gas CO2 hydrogenation to fuels: A thermodynamic analysis, Environmental Progress & Sustainable Energy, 2018, 38, 98. Link
  117. Afreen, G.; Patra, T.; Upadhyayula, S. Thermodynamic Insights into Valorization of Biomass-Derived Oxygenates and Reconciliation with Experimental Study, Journal of Chemical & Engineering Data, 2018, 63, 2197. Link
  118. Hundessa, D.; Kondamudi,K.V.K.; Upadhyayula, S.; Mohan R. Ruthenium doped nickel-alumina-ceria catalyst in glycerol steam reforming, Fuel Processing Technology, 2018, 69, 150. Link
  119. Parveen, F.; Patra, T.; Upadhyayula, S. A structure–activity relationship study using DFT analysis of Bronsted–Lewis acidic ionic liquids and synergistic effect of dual acidity in one-pot conversion of glucose to value-added chemicals, New Journal of Chemistry, 2018, 42, 1430. Link
  120. Bandyopadhyay, R.; Upadhyayula, S. Thermodynamic analysis of diesel hydrotreating reactions, Fuel, 2018, 214, 314. Link
  121. Kumar, K.; Parveen, F.; Patra, T.; Upadhyayula, S. Hydrothermal conversion of glucose to levulinic acid using multifunctional ionic liquids: effects of metal ion co-catalysts on the product yield, New Journal of Chemistry, 2018, 42, 288. Link
    122. 2017
  122. Afreen, G.; Patra, P.; Upadhyayula, S. Zn-loaded HY zeolite as active catalyst for iso-propylation of biomass-derived phenolic compounds: A comparative study on the effect of acidity and porosity of zeolites, Molecular Catalysis, 2017, 441, 122. Link
  123. Azam, F.; Allabdullah, N. H.; Ehmedat, H. M.; Abdulifa, A. R.; Taban, I.; Upadhyayula, S. NSAIDs as potential treatment option for preventing amyloid ß toxicity in Alzheimer’s disease: an investigation by docking, molecular dynamics, and DFT studies. J. Biomol. Struc. Dynamics 2017. Link
  124. Sonal; Kondamudi, K.; Pant, K. K.; Upadhyayula, S. Synergistic effect of Fe-Co bimetallic catalyst on FTS and WGS activity in the Fischer Tropsch process: A kinetic study. Ind. Eng. Chem. Res. 2017. Link
  125. Parveen, F.; Upadhyayula, S. Efficient conversion of glucose to HMF using organocatalysts with dual acidic and basic functionalities - A mechanistic and experimental study. Fuel Proc. Technol. 2017, 162, 30. Link
  126. Patra, T.; Parveen, F.; Upadhyayula, S. Mechanistic insights into solvent induced alkylation of p-cresol with tert-butyl alcohol using Brönsted acidic ionic liquids. Mol. Catal. 2017, 433, 175. Link
  127. Patra, T.; Karmakar, S.; Upadhyayula, S. Multifunctional Ionic Liquid-Bound Polystyrene Resin with High Loading Capacity as Support in Solid-Phase Peptide Synthesis. Tetrahedron Lett. 2017, 58 (15), 1531. Link
  128. Golie, W. M.; Upadhyayula, S. An Investigation on Biosorption of Nitrate from Water by Chitosan Based Organic-Inorganic Hybrid Biocomposites. Int. J. Biol. Macromol. 2017, 97, 489. Link
  129. Parveen, F.; Gupta, K.; Upadhyayula, S. Synergistic Effect of Chloro and Sulphonic Acid Groups on the Hydrolysis of Microcrystalline Cellulose under Benign Conditions. Carbohydr. Polym. 2017, 159, 146. Link
    130. 2001-2016
  130. Sonal; Pant, K. K.; Upadhyayula, S. Synthesis of C5+ Hydrocarbons from Low H2/CO Ratio Syngas over Silica Supported Bimetallic Fe-Co Catalyst. Catal. Today 2016. Link
  131. Golie, W. M.; Upadhyayula, S. Continuous Fixed-Bed Column Study for the Removal of Nitrate from Water Using Chitosan/alumina Composite. J. Water Process Eng. 2016, 12, 58. Link
  132. Parveen, F.; Patra, T.; Upadhyayula, S. Hydrolysis of Microcrystalline Cellulose Using Functionalized Bronsted Acidic Ionic Liquids-a Comparative Study. Carbohydr. Polym. 2016, 135, 280. Link
  133. Elavarasan, P.; Kondamudi, K.; Upadhyayula, S. A Functionalized, Supported Ionic Liquid for Alkylation of p-Cresol with tert-Butyl Alcohol. J. Chem. Eng. Process Technol. 2016, 7 (1), 1. Link
  134. Patra, T.; Ahamad, S.; Upadhyayula, S. Highly Efficient Alkylation of Phenol with tert-Butyl Alcohol Using Environmentally Benign Bronsted Acidic Ionic Liquids. Appl. Catal. A Gen. 2015, 506, 228. Link
  135. Singh, A. K.; Kondamudi, K.; Yadav, R.; Upadhyayula, S.; Sakthivel, A. Uniform Mesoporous Silicoaluminophosphate Derived by Vapor Phase Treatment: Its Catalytic and Kinetic Studies in Hydroisomerization of 1-Octene. J. Phys. Chem. C 2014, 118, 27961. Link
  136. Singh, A. K.; Yadav, R.; Sudarsan, V.; Kondamudi, K.; Upadhyayula, S.; Sakthivel, A. Mesoporous SAPO-5 (MESO-SAPO-5): A Potential Catalyst for Hydroisomerisation of 1-Octene. RSC Adv. 2014, 8, 8727. Link
  137. Bahri, S.; Sharma, S.; Upadhyayula, S. Application of Low Grade Phosphate Rock as Fertilizer with Urea and Urea along with Organic Manure in Alkaline Soil: A Preliminary Study. Int. J. Appl. Life Sci. Eng. 2014, 1, 66.
  138. Sekhar, D. M. R.; Prabhulingaiah, G.; Dassin, Y.; Pillai, M. G.; Upadhyayula, S. Discarded phosphatic slimes as fertilizer in alkaline soils. Inzynieria Mineralna 2013, 14 (2), 167.
  139. Kondamudi, K.; Upadhyayula, S. Kinetic Studies of Sulfuric Acid Decomposition over Al-Fe2O3 Catalyst in the Sulfur-Iodine Cycle for Hydrogen Production. Int. J. Hydrogen Energy 2012, 37, 3586. Link
  140. Elavarasan, P.; Kondamudi, K.; Upadhyayula, S. Kinetics of Phenol Alkylation with tert-Butyl Alcohol Using Sulfonic Acid Functional Ionic Liquid Catalysts. Chem. Eng. J. 2011, 166, 340. Link
  141. Elavarasan, P.; Kondamudi, K.; Upadhyayula, S. Synthesis of Antioxidants: Green Chemistry Route. Int. J. Chem. Sci. 2010, 8 (5), 578.
  142. Kondamudi, K.; Elavarasan, P.; Dyson, P. J.; Upadhyayula, S. Alkylation of p-Cresol with tert-Butyl Alcohol Using Benign Bronsted Acidic Ionic Liquid Catalyst. J. Mol. Catal. A Chem. 2010, 321, 34. Link
  143. Elavarasan, P.; Kondamudi, K.; Upadhyayula, S. Comparative Kinetic Study on Alkylation of p-Cresol with tert-Butyl Alcohol Using Different SO3-H Functionalized Ionic Liquid Catalysts. Int. J. Chem. Mol. Nucl. Mater. Metall. Eng. 2010, 4 (6), 384.
  144. Singhal, R.; Singhal, C.; Upadhyayula, S. Thermal-Catalytic Degradation of Polyethylene over Silicoaluminophosphate Molecular Sieves- A Thermogravimetric Study. J. Analytical and Appl. Pyrolysis, 2010, 89, 313. Link
  145. Upadhyayula, S. Gas Phase Toluene Isopropylation over High Silica Mordenite. J. Chem. Sci. 2010, 122 (4), 613.
  146. Elavarasan, P.; Kondamudi, K.; Upadhyayula, S. Relative Acidity Measurement of Bronsted Acid Functional Ionic Liquids by UV-Spectroscopy. Bull. Catal. Soc. India 2009, 8, 107.
  147. Elavarasan, P.; Kondamudi, K.; Upadhyayula, S. Statistical Optimization of Process Variables in Batch Alkylation of p-Cresol with tert-Butyl Alcohol Using Ionic Liquid Catalyst by Response Surface Methodology. Chem. Eng. J. 2009, 155, 355.
  148. Upadhyayula, S. Alkylation of Toluene with Isopropyl Alcohol over SAPO-5 Catalyst. J. Chem. Sci. 2009, 121 (2), 199.
  149. Kondamudi, K.; Upadhyayula, S. Transalkylation of Diisopropylbenzene with Benzene over SAPO-5 Catalyst: A Kinetic Study. J. Chem. Technol. Biotechnol. 2008, 83, 699.
  150. Upadhyayula, S. Alkylation of Benzene with Isopropanol over SAPO-5: A Kinetic Study. Can. J. Chem. Eng. 2008, 86, 207.
  151. Upadhyayula, S. Analysis of Oxidative Stabilization of Mesophase Pitch Matrix in Carbon-Carbon Composites, with Respect to Oxygen Permeability and Crosslinking. Ind. Eng. Chem. Res. 2007, 46, 2907.
  152. Nandi, S.; Badhe, Y.; Lonari, J.; Sridevi, U.; Rao, B. S.; Tambe, S. S.; Kulkarni, B. D. Hybrid Process Modeling and Optimization Strategies Integrating Neural Networks / Support Vector Regression and Genetic Algorithms: Study of Benzene Isopropylation on Hbeta Catalyst. Chem. Eng. J. 2004, 97, 115.
  153. Sridevi, U.; Pradhan, N. C.; Rao, B. K. B.; Satyanarayana, C. V. Y.; Rao, B. S. Alkylation of Benzene with Isopropyl Alcohol over SAPO-5 Catalyst in an Integral Pressure Reactor. Catal. Lett. 2002, 79, 69.
  154. Sridevi, U.; Bokade, V. V; Satyanarayana, C. V. V; Rao, B. S.; Pradhan, N. C.; Rao, B. K. B. Kinetics of Propylation of Benzene over H-Beta and SAPO-5 Catalysts: A Comparison. J. Mol. Catal. A Chem. 2002, 181, 257.
  155. Sridevi, U.; Rao, B. K. B. S.; Pradhan, N. C.; Tambe, S. S.; Satyanarayana, C. V. Kinetics of Isopropylation of Benzene over HBeta Catalyst. Ind. Eng. Chem. Res. 2001, 40 (14), 3133.
  156. Sridevi, U.; Rao, B. K. B.; Pradhan, N. C. Kinetics of Alkylation of Benzene with Ethanol on AlCl3-Impregnated 13X Zeolites. Chem. Eng. J. 2001, 83, 185.
Patents:
  1. Vankayala, R.; Upadhyayula, S.; Chebrolu, S.; Rakshit, P.; Racha, A.; "Process for co-processing syngas and bio-oils using a heterogeneous catalyst for sustainable fuels production”, Patent application submitted on May 2024.
  2. Vankayala, R.; Upadhyayula, S.; Chebrolu, S.; Rakshit, P.; Racha, A.; "Catalyst for co-processing syngas and bio-oils using a heterogeneous catalyst for sustainable fuels production”, Patent application submitted on May 2024.
  3. Upadhyayula, S.; Pathak, S.; Parvatalu, D.; Chaudhary, S.; “Process for pre-treatment of metal oxide catalysts to enhance their catalytic activity in sulfuric acid decomposition”, Patent application submitted.
  4. Upadhyayula, S., Banerjee, D.; Sahu, A.K.; "A Catalyst and a process for its preparation and its application" IN application no.: 202411058047 filed on July 31, 2024.
  5. Upadhyayula, S., Tiwari, S.C.; Nigam, K.D.P.; Pant, K.K.; "Intensified CO2 capture process with an ionic blend system and absorber" IN application no: 202411037098 filed on May 10, 2024.
  6. Kumar, R.; Chebrolu, S.; Volapalli, R. K.; Upadhyayula, S., “A two-stage solvent deasphalting dearomatization (SD-A2) process for heavy oil upgradation” US Patent application June 2020.
  7. Kumar, R.; Rakshit, P. K.; Volapalli, R. K.; Upadhyayula, S., “Prediction of crude oil blend compatibility and blend optimization for increasing heavy oil processing”, US Patent Grant No.: 10365263 Jul 30, 2019, 2019-07-30: Publication of US10365263B1, 2019-08-01: Publication of US20190234928A1 and European Patent Application no. 18164352.9.
  8. Upadhyayula, S.; Patra, T.; Paul, S. A process for preparation of a peptide, PCT/IN2017/050624, Filed on: December 28, 2017.
  9. Upadhyayula, S.; Patra, T.; Paul, S. Ionic liquid based support for manufacture of peptides, PCT/IN2017/050623, Filed on: December 28, 2017.
  10. Upadhyayula, S.; Bhaskarwar, A.; Kondamudi, K.; Damraju, P.; Bhargava, B.; Bannerjee, S. Catalyst composition for conversion of sulfur trioxide and hydrogen production process, PCT/IN2017/050151, Filed on: April 27, 2017.
  11. Upadhyayula, S.; Bhaskarwar, A.; Kondamudi, K.; Damraju, P.; Bhargava, B.; Bannerjee, S. Process for conversion of sulfur trioxide and hydrogen production, PCT/IN2017/050150, Filed on: April 27, 2017.
  12. Upadhyayula, S.; Patra, T.; Paul, S. A process for preparation of a peptide, Indian Patent Application no.: IN201611044692.
  13. Upadhyayula, S.; Patra, T.; Paul, S. Ionic liquid based support for manufacture of peptides, Indian Patent Application no.: IN201611044691.
  14. Upadhyayula, S.; Bhaskarwar, A.; Kondamudi, K.; Damraju, P.; Bhargava, B.; Bannerjee, S. Process for conversion of sulfur trioxide and hydrogen production, Indian Patent Application no.: IN201611014896.
  15. Upadhyayula, S.; Bhaskarwar, A.; Kondamudi, K.; Damraju, P.; Bhargava, B.; Bannerjee, S. Catalyst composition for conversion of sulfur trioxide and hydrogen production process, Indian Patent Application no: IN201611014898.
  16. Upadhyayula, S.; Patra, T.; Kondamudi, K. Ionic liquid catalyst and a process for preparation thereof, and improved tertiary butylation of phenol/phenolic compounds for higher conversion of phenol and phenolic compounds, Indian Patent Application no: IN1290/DEL/2012, Publication date: 31/08/2016.
Book Chapters:
  1. Singla, A.; Upadhyayula, S.; Nano-Biomaterials”, Book Chapter in “Handbook of Smart Materials, Technologies, and Devices: Applications of Industry 4.0; 1st Edition; 2021; Springer, USA.
  2. Kumar, K.; Upadhyayula, S.; Valorization of biomass derived aldehydes into oxygenated compounds; Book Chapter in Handbook of Biomass Valorisation for Industrial Applications; 2021; Wiley-Scrivener, John Wiley & Sons, NY, USA.
  3. Afreen, G.; Upadhyayula, S.;Ultrasonic wastewater treatment”, Book Chapter in “Advanced Materials and Waste Water Technologies; 2021; CRC press, Taylor &Francis group, FL, USA.
  4. Yadav, R.; Upadhyayula, S.; Natural gas dehydroaromatization; Book Chapter in Direct Natural Gas Conversion to Value-Added Products; 1st Edition; 2020; CRC Press, 512.
  5. Chaudhary, A.; Upadhyayula, S.; Supercritical Fluids as Green Solvents; Book Chapter in Handbook of Greener Synthesis of Nanomaterials and Compounds; 1st Edition; 2021; Springer, USA.
  6. Parveen, F.; Ahmad, K.; Upadhyayula, S.; Catalytic Conversion of Biomass Derived Cellulose to 5-Hydromethyl Furfural; Book Chapter in ‘Integrating Green Chemistry and Sustainable Engineering’, Wiley-Scrivener publishers; John Wiley &Sons, NY; 2019; 113-163.
  7. Ahmad, K.; Parveen, F.; Anushree; Upadhyayula, S.; Heterogeneous Catalytic Conversion of Greenhouse Gas CO2 to Fuels; Book Chapter in ‘Integrating Green Chemistry and Sustainable Engineering’, Wiley-Scrivener publishers; John Wiley&Sons, NY; 2019, 57-80.
  8. Wondalem, M. G.; Ahmad,K.; Upadhyayula, S.; A Review on the Removal of Nitrate from Water by Adsorption on Organic-Inorganic Hybrid Biocomposites, Book Chapter in 'Advanced Materials for Wastewater Treatment', Wiley-Scrivener publishers;John Wiley&Sons, NY; 2017; 433-477.
Books:
  1. “Advanced Materials and Technologies for Wastewater Treatment”, Edited by Upadhyayula S. & Chaudhary A.; 1st Edition, CRC Press, Taylor& Francis Group, USA, 2021, cat # 417057 and ISBN # 9780367686161.
  2. “Friedel-Crafts Alkylation of Aromatics with Alcohols and Transalkylation Reactions: From Solid Acid Catalysts to Green Ionic Liquids”, Upadhyayula S. & Afreen G., Eliva Press SRL, Europe, November 2020, ISBN # 9781636480268.
Technical Reports:
  1. Jayanti S.; Aghayalayam P.; Sharma D.K.; Upadhyayula ; Rao A.B.; Chandel M., Parikh J.; report on “Global Technology Watch Group (GTWG) -Advanced Coal Technologies”, 2019, submitted to Department of Science and Technology, SPLICE Division, New Delhi.