Impact of Ni/Cr and Ni/Cr/Ru Catalysts on the Performance of a Biogas Dry Reforming Membrane Reactor Using Pd/Cu Membrane

Abstract

Biogas dry reforming experiments were performed using membrane reactors with Ni/Cr and Ni/Cr/Ru catalysts as well as a Pd/Cu membrane for H₂ separation. H₂ yield and energy efficiency of the membrane reactors were investigated by varying the catalyst type, reaction temperature, pressure difference between the reaction and sweep chambers, inlet gas molar ratio, and with and without sweep gas. In this research, the CH₄ and CO₂ conversion rates, H₂ yield, H₂ permeation rate, H₂ and CO selectivity, thermal efficiency, and H₂ permeation flux were evaluated. As a result, H₂ yield and thermal efficiency for Ni/Cr/Ru catalyst increase 0.241% and 3.31%, respectively compared to the Ni/Cr catalyst. The concentration of produced H₂ using Ni/Cr/Ru was higher in than using Ni/Cr by 2871 ppmV.