Excessive emission of CO2 leads to some climate changes. CO2 is also a C1 sources for formation of important chemicals including methanol, which is a significant raw material for value-added chemicals and a clean fuel and fuel additive. Efficient transformation of CO2 to methanol with a green process is highly important. In the present work, we developed a series of bimetallic catalysts, especially for stable precious metals supported on ZSM-5, which were used in direct CO2 hydrogenation to methanol at a low temperature (130 oC) in aqueous media. An RhPd/ZSM-5 catalyst with loadings of 1wt% Rh and 1wt% Pd showed a highest STY of methanol (0.47 mmolCH3OH.gcat-1.h-1) than that of RuPd/ZSM-5 (0.03 mmolCH3OH.gcat-1.h-1), CuPd/ZSM-5 (0.41 mmolCH3OH.gcat-1.h-1), CoPd/ZSM-5 (0.07 mmolCH3OH.gcat-1.h-1), and other tested catalysts. Water, as the main by-product, was proved to be a cheap, safe, efficient and green solvent for methanol synthesis. The systemic investigations of the catalytic structure-activity relationship indicated that the composition of bimetallic catalysts, supports, and reaction conditions were crucial for the catalytic performances.

CO2 hydrogenation to methanol over an RhPd/ZSM-5 catalyst under mild conditions in aqueous media

2019 Spring National Meeting

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