抄録
The purpose of this study is to investigate the effects of fluctuating reaction condition on the methanation performance over the structured Ni/CeO2 reaction system. In the near future, catalysts will have to be more tolerant towards a varying supply of energy and raw materials such as wind/solar energy and hydrogen. This is mainly due to the fluctuating nature of such renewable energies. Power-to-chemical processes including CO2 methanation also require a shift from steady-state operation towards operation under fluctuating reaction conditions. This brings along a number of demands for the design of both catalysts and reactors, because it is well known that the structure of catalysts is very dynamic under reaction. Therefore, in-depth studies of catalysts and catalytic reactors under such transient conditions are required. A stability of structured Ni/CeO2 reaction system was examined under the fluctuating reaction condition. The investigation of methanation performance such as CO2 conversion and CH4 selectivity after H2 drop out over the Ni/CeO2 structured catalyst was experimentally performed. The fluctuating reaction conditions were examined at various temperature, feed flow rate and CO2 partial pressure. The physiochemical property of catalyst was analyzed by BET, SEM and XPS analyses.
