Oklahoma State University
« February 2015 »
Contact Info
Bioenergy Center
139 Agricultural Hall
Stillwater, OK    74078

Phone: 405.744.5425
Fax: 405.744.5339



Ajay Kumar, Ph.D.

AJAY kumar

Assistant Professor, Biosystems and Agricultural Engineering





Research Interests

  • Biomass thermochemical conversions: gasification and pyrolysis
  • Characterization of biomass for thermochemical conversions
  • Modeling biomass conversion processes
  • Syngas cleanup and conditioning
  • Syngas conversion into power, fuels and chemicals
  • Synthesis and evaluation of catalysts for fuels and chemicals production
  • Utilization of biochar 



professional memberships

    • American Society of Agricultural and Biological Engineers (ASABE)
    • American Institute of Chemical Engineers (AIChE)
    • American Society of Engineering Education (ASEE) 

    sElected publications and presentations


    • Wang, Duo, Wenqiao Yuan*, Donghai Wang, and Ajay Kumar. (Accepted). A char-supported nano-NiO catalyst for biomass syngas cleanup and conditioning. Transactions of ASABE.
    • Bhandari, Pushpak N., A. Kumar*, and Raymond L. Huhnke. (Available online in 2013). Simultaneous removal of toluene (model tar), NH3, and H2S, from biomass-generated producer gas using biochar-based and mixed-metal oxide catalysts. Energy & Fuels.
    • Bhandari, Pushpak N., A. Kumar*, Danielle Bellmer, and Raymond L. Huhnke. (Accepted). Synthesis and evaluation of biochar-derived catalysts for removal of toluene (model tar) from biomass-generated producer gas. Renewable Energy. doi:10.1016/j.renene.2013.12.017.
    • Sarkar, Madhura, A. Kumar*, Jaya Shankar Tumuluru, Krushna Patil, and Danielle Bellmer (Accepted). Thermal Devolatilization Kinetics of Switchgrass Pretreated with Torrefaction and Densification. Special Issue of Transactions of ASABE.
    • Penn, Chad*, Derek. Heeren, Garey Fox, and A. Kumar (In Press). Application of isothermal calorimetry to phosphorus sorption onto soils in a flow-through system. Soil Science Society of America Journal. In Press. doi:10.2136/sssaj2013.06.0239.
    • Sharma, Ashokkumar, M. A. Kumar*, and Raymond L. Huhnke. 2014 (Available online in 2013). Effect of steam injection location on syngas obtained from an air-steam gasifier. Fuel. 388-394.
    • Qian, Kezhen, Ajay Kumar, Krushna Patil, Danielle Bellmer, Donghai Wang, Wenqiao Yuan, Raymond L Huhnke. 2013. Effects of biomass feedstocks and gasification conditions on the physiochemical properties of biochar. Energies. 6(8): 3972-3986.
    • Sharma, A. M., A. Kumar, K. N. Patil and R. L. Huhnke. 2013. Fluidization characteristics of a mixture of gasifier solid residues, switchgrass and inert material. Powder Technology. 235: 661-668.
    • Pasangulapati, V., A. Kumar, C. L. Jones, and R. L. Huhnke. 2012. Characterization of switchgrass, cellulose, hemicellulose and lignin for thermochemical conversions. Journal of Biobased Materials and Bioenergy. 6(3):249-258.
    • Pasangulapati, V., K. D. Ramachandriya, A. Kumar, M. R. Wilkins, C. L. Jones, and R. L. Huhnke. 2012. Effects of cellulose, hemicellulose and lignin on thermochemical conversion characteristics of the selected biomass. Bioresource Technology. 114: 663-669.
    • Sharma, A. M., A. Kumar, K. N. Patil, and R. L. Huhnke. 2011. Performance evaluation of a lab-scale fluidized bed biomass gasifier using switchgrass as feedstock. Transactions of ASABE. 54(6):2259-2266.
    • Mudinoor, A. R., D. Bellmer, L. Marin, A. Kumar, R. Huhnke. Conversion of toluene (model tar) using selected steam reforming catalysts. Transactions of ASABE. 54(5):1819-1827.
    • Kumar, A., Y. Demirel, D. D. Jones, and M. A. Hanna. 2010. Optimization and economic evaluation of industrial gas production and combined heat and power generation from gasification of corn stover and distillers grains. Bioresource Technology 101(2010):3696-3701.
    • Kumar, A., D. D. Jones, and M. A. Hanna. 2009. Thermochemical biomass gasification: A review of the current status of the technology. Energies 2(3):556-581.
    • Kumar, A., Y. Demirel, H. Noureddini, D. D. Jones, and M. A. Hanna. 2009. Simulation of corn stover and distillers grains gasification with Aspen Plus. Transactions of ASABE. 52(6):1989-1995.
    • Kumar, A., K. Eskridge, D. D. Jones, and M. A. Hanna. 2009. Steam-air fluidized bed gasification of distillers grains: effects of steam to biomass ratio, equivalence ratio and gasification temperature. Bioresource Technology 100(6):2062-2068.
    • L. Wang, A. Kumar, C. L. Weller, M. A. Hanna, and D. D. Jones. 2009. Thermal degradation kinetics of distillers grains in nitrogen and air. Energy Sources, Part A: Recovery, Utilization, and Environmental Effects 31(10):797-806.
    • H. Pushpadass, A. Kumar, D. Jackson, R. Wehling, J. Dumais, and M. A. Hanna. 2009. Macromolecular changes in extruded starch-films plasticized with glycerol, water and stearic acid. Starch 5(5):256-266.
    • Kumar, A., L. Wang, D. Yuris, D. D. Jones, and M. A. Hanna. 2008. Thermogravimetric characterization of corn stover as gasification and pyrolysis feedstock. Biomass and Bioenergy 32:460-467.
    • Kumar, A., G. M. Ganjyal, David D. Jones, and M. A. Hanna. 2008. Modeling residence time distribution in a twin-extruder as a series of ideal steady-state flow reactors. Journal of Food Engineering 84:441-448.

    return to top


    Document Actions