Dhruba Deka

Bio

Dhruba Deka is an R&D Associate Staff in the Chemical Process Scale Up Group, which is a part of Energy and Industrial Decarbonization Section in the Manufacturing Science Division. Dhruba had joined ORNL as a Postdoctoral Research Associate in the Applied Catalysis and Emissions Research Group, Buildings and Transportation Science Division in 2020. Dhruba's primary research focus is utilization of heterogeneous catalysis and electro-catalysis for environmentally beneficial reactions to achieve decarbonization and pollutant reduction. His interests also include CO₂ capture via solvent absorption.

As a part of ORNL, Dhruba has worked on elucidating the real-life degradation chemistry of commercial Cu-SSZ-13 NH₃-SCR catalysts. His research also included investigation of reaction network and chemistry inside a natural gas three way catalyst under air-fuel dithering conditions. Currently, Dhruba is active in the area of CO₂ capture and electro-catalytic conversion.

Dhruba joined ORNL after receiving his PhD in Chemical Engineering from the Ohio State University in May, 2020. His doctoral work involved development of solid oxide electrolysis cell electrodes for applications in CO₂/H₂O reduction, NH₃ production and partial hydrocarbon oxidation. 

Publications:

Journal Articles:

• D. J. Deka, A. Ladshaw, R. Daya, S. Joshi, K. Kamasamudram, W. Partridge, Impact of field aging on the SCR redox half cycles on Cu-SSZ-13 monolith catalysts, Applied Catalysis B: Environmental, 309 (2022) 121233
• R. Daya, D. Trandal, U. Menon, D. J. Deka, W. P. Partridge, S. Y. Joshi, Kinetic Model for the Reduction of Cu^II Sites by NO+NH₃ and Reoxidation of NH₃-Solvated Cu^I Sites by O₂ and NO in Cu-SSZ-13, ACS Catalysis, 12 (2022), 6418-6433
• D.J. Deka, R. Daya, A. Ladshaw, S. Joshi, K. Kamasamudram, W. P. Partridge, A Transient-Response methodology based on experiments and modeling for Cu-Redox Half-Cycle kinetic analysis on a Cu-SSZ-13 SCR catalyst, Chemical Engineering Journal, 435 (2022) 134219
• D. J. Deka, R. Daya, S. Joshi, W. Partridge, On the Various Cu-redox Pathways and O₂-mediated Bronsted-to-Lewis adsorbed-NH₃ Redistribution Under SCR Half-cycle Conditions, Applied Catalysis A: General, 640 (2022) 118656
• S. Adhikari, J. Zhan, K. Unoci, E. C. Wegener, P. Kunal, D. J. Deka, T. Toops, S. S. Majumdar, T. R. Krause, D. Liu, Z. Li, Direct 2,3-Butanediol Conversion to Butene-Rich C₃₊ Olefins over Copper-Modified 2D Pillared MFI: Consequence of Reduced Diffusion Length, ACS Sustainable Chemistry and Engineering, 10 (2022), 1664-1674
• S. Gunduz, D. J. Deka, M. Ferree, J. Kim, JMM MIllet, U. Ozkan, Composite Cathodes with Oxide and Nitride Phases for High-Temperature Electrocatalytic Ammonia Production from Nitrogen and Water, ECS Advances, 1 (2022), 014501
• D. J. Deka, S. Gunduz, J. Kim, M Aouine, JMM Millet, A. Co, U. Ozkan, Investigation of Hetero-phases Grown via In-situ Exsolution on a Ni-doped (La,Sr)FeO₃ Cathode and the Resultant Activity Enhancement in CO₂ Reduction, Applied Catalysis B: Environmental, (2021) 119917
• S. Gunduz, D. J. Deka, J. Kim, M. Wilson, M. Warren, U. Ozkan, Incident-angle dependent operando XAS cell design: investigation of the electrochemical cells under operating conditions at various incident angles, RSC Advances, 11 (2021) 6456-6463
• D. J. Deka, J. Kim, S. Gunduz, D Jain, Y Shi, JT Miller, A. Co, U. Ozkan, Coke formation during high-temperature CO₂ electrolysis over AFeO₃ (A= La/Sr) cathode: Effect of A-site metal segregation, Applied Catalysis B: Environmental, 283 (2021), 119642
• D. J. Deka, J. Kim, S. Gunduz, Y. Shi, A. Co, U. Ozkan, Temperature-induced changes in the synthesis gas composition in a high-temperature H₂O and CO₂ co-electrolysis system, Applied Catalysis A: General, 602 (2020), 117697
• S. Gunduz, D. J. Deka, J. Kim, U. Ozkan, A review on current trends in electrocatalytic ammonia production, Journal of Catalysis 387 (2020) 207–216
• D. Jain, V. Gustin, D. Basu, S. Gunduz, D. J. Deka, A. C. Co, U. Ozkan, Phosphate tolerance of nitrogen-coordinated-iron-carbon (FeNC) catalysts for oxygen reduction reaction: A size-related hindrance effect, Journal of Catalysis, 390 (2020), 150-160 
• D. J. Deka, S. Gunduz, T. Fitzgerald, J. T. Miller, A. Co, U. Ozkan, Production of syngas with controllable H₂/CO ratio by high temperature co-electrolysis of CO₂ and H₂O over Ni and Co doped La_0.7Sr_0.2FeO_3-δ perovskite cathodes, Applied Catalysis B: Environmental, 248 (2019) 487–503
• D. J. Deka, S. Gunduz, J. Kim, T. Fitzgerald, A. Co, U. Ozkan, Hydrogen production from water in a solid oxide electrolysis cell: effect of Ni doping on lanthanum strontium ferrite perovskite cathode, Industrial and Engineering Chemistry Research, 58 (2019), 22497-22505
• D. Dogu, S. Gunudz, K. Meyer, D. J. Deka, A. C. Co, U. Ozkan, CO2 and H2O Electrolysis Using Solid Oxide Electrolyzer Cell (SOEC)
  with La and Cl‐ doped Strontium Titanate Cathode, Catalysis Letters, 149 (2019), 1743-1752
• S. Gunduz, D. Dogu, D. J. Deka, K. Meyer, A. Co, U. Ozkan, Application of solid electrolyte cells in ion pump and electrolyzer modes to promote catalytic reactions, Catalysis Today, 323 (2019), 3-13
• D. Dogu, K. Meyer, A. Fuller, S. Gunduz, D. J. Deka, N. Krammer, A. Co, U. Ozkan, Effect of lanthanum and chlorine doping on strontium titanates for the electrocatalytically-assisted oxidative dehydrogenation of ethane, Applied Catalysis B: Environmental, 227 (2018), 90-101

Book Chapter:

• S. Gunduz, D. J. Deka, U. Ozkan, Advances in High-Temperature Electrocatalytic Reduction of CO₂ and H₂O, Advances in Catalysis, 62 (2018), 113-165

Patent:

• U. Ozkan, S. Gunduz, D.J. Deka, Materials for ammonia synthesis, US Patent App. 16/742, 390 (2020)

Publications