Coffee Pulp Gasification for Syngas Obtention and Methane Production Simulation Using Ni Catalysts Supported on Al(2)O(3) and ZrO(2) in a Packed Bed Reactor

The methanation of CO(2) is of great interest in power-to-gas systems and contributes to the mitigation of climate change through carbon dioxide capture and the subsequent production of high-added-value products. This study investigated CO(2) methanation with three Ni catalysts supported on Al(2)O(3) and ZrO(2), which were simulated using a mathematical model of a packed bed reactor designed based on their chemical kinetics reported in the literature. The simulated reactive system was fed with syngas obtained from residual coffee pulp obtained after a solvent phytochemical extraction process under several gasification conditions. The results reflect a high degree of influence of the catalyst support, preparation method, and syngas composition on CO(2) and H(2) conversions and CH(4) selectivity. For all the syngas compositions, the Ni/ZrO(2) catalysts showed the best values for CO(2) conversion and H(2) conversion for the Ni/Al(2)O(3) catalyst except in gasification at 700 °C and using the Ni/ZrO(2)p catalyst.