International Journal of Hydrogen Energy, Vol.45, No.22, 12256-12271, 2020
Kinetic study of dry reforming of methane using hybrid DBD plasma reactor over La2O3 co-supported Ni/MgAl2O4 catalyst
A kinetic study on dry reforming of methane (DRM) in hybrid dielectric barrier discharge (DBD) plasma reactor over La2O3 co-supported Ni/MgAl2 O-4 catalyst has been investigated. Three different parametric effects namely specific input energy (SIE), discharge volume (V-D) and feed flow rate corresponding to GHSV (h(-1)) are studied using the modified power-law model. The developed kinetic model indicates instantaneous conversions of CH4 and CO2 are functions of SIE, V-D and GHSV. Increasing SIE linearly enhances the conversion of CH4 and CO2, while V-D displays a non-linear relation with conversion and selectivity. GHSV also shows a linear relation with instantaneous CH4 and CO2 conversion and selectivity of H-2 and CO. The rate constants (kCH(4), kCO(2)), determined using the proposed kinetic model and various process parameters, are compared with DRM experimental results for validation. The apparent activation energy (E-a), calculated for CH4 and CO2 using modified Arrhenius equation, are = 32.6 kJ mol(-1) (CH4) and E-a = 35.2 kJ mol(-1) (CO2), respectively. The modified power-law model is a good preliminary description for future understanding of the overall performance of a hybrid catalytic DBD plasma reactor for DRM. (C) 2020 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.