Catalytic performance of CH4-CO4 reforming over metal free nitrogen-doped biomass carbon catalysts: Effect of different preparation methods

A series of nitrogen doped biomass carbon catalysts were prepared through two different nitrogen doped methods by using soybean meal as the raw material, melamine as nitrogen source and KOH as the activators. The catalysts were characterized by BET, SEM, CO2-TPD, EA, FTIR, XPS and Raman. The catalytic performances of CH4-CO2 reforming over different samples were also studied. The results show that the preparation method of the catalyst significantly affects the structural characteristics, N content and N species type of the catalyst. The characterization results also show the proportion of pyrrolic-N in the catalyst prepared by in-situ nitrogen doped method (Y-NC) is higher than that in prepared by the post-treatment method (H-NC). Pyrrole-N is more conducive to the adsorption and activation of CO2. So, the catalyst prepared by in-situ nitrogen doped method has good catalytic activity and stability. The conversion of CH4 and CO2 were respectively 40% and 65% at 900 degrees C after 50 h of CH4-CO2 reforming reaction. (C) 2021 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.

Automated summary

A series of nitrogen-doped biomass carbon catalysts were prepared using two different methods and their catalytic performances in CH4-CO2 reforming were studied. The catalyst prepared by in-situ nitrogen doping method showed higher pyrrole-N content, which is more conducive to CO2 adsorption and activation, resulting in good catalytic activity and stability.