CO2 Reforming with Ethanol for Syngas Production over SiO2‐M@CeO2 Catalysts (M: Cu,Ni): Impact of Active Metal

Abstract

AbstractIt is of great significance to design the high‐performance catalysts with good anti‐sintering and coke‐resistance properties which can efficiently convert undesirable greenhouse gas CO2 with bio‐ethanol into high value‐added syngas. To be addressed this issue, a series of SiO2‐M@CeO2 (M: Cu, Ni) catalysts with typical core@shell structure were prepared via a strong electrostatic adsorption technique. Interestingly, Ni‐based catalyst exhibited the higher activity towards ethanol dry reforming at the relatively low temperature. Meanwhile, SiO2‐Ni@CeO2 catalyst presented good stability after a 50 h tests while a serious deactivation occurred for SiO2‐Cu@CeO2 within 20 h reaction due to heavy carbon deposition and reactor blockage. Herein, the higher catalytic performance of SiO2‐Ni@CeO2 catalyst compared to SiO2‐Cu@CeO2 sample was attributed to the combination effect of its mesoporous structure, higher Ni dispersion as well as stronger Ni‐Ce interaction as depicted by BET, TEM, XPS, H2‐TPR and XRD findings. This work might provide meaningful information to other reforming processes involving coke formation and active metal sintering problems.