An Fe-promoted Rh/SiO2 catalyst (Fe + Rh/SiO2) was investigated in terms of the strong metal-oxide interaction (SMOI) between Rh metal and Fe oxide (FeOx) and its application to low-temperature ethanol reforming. Fe + Rh/SiO2 was prepared by a conventional co-impregnation method followed by high-temperature calcination in air at 973 K. For low-temperature ethanol reforming, Fe + Rh/SiO2 was subjected to low-temperature reduction with hydrogen at 573 K, and exhibited enhanced dehydrogenation of ethanol. The generation of carbon monoxide and methane byproducts was suppressed by the SMOI between Rh and FeOx, which inhibited acetaldehyde decomposition. Moreover, high-temperature reduction of Fe + Rh/SiO2 with hydrogen at 773 K (HTR) significantly enhanced steam reforming of ethanol due to interaction between the Fe-Rh alloy and FeOx. These results will lead to efficient utilization of rare and active precious metals by the addition of cheap iron oxide, and promise efficient production of hydrogen and acetaldehyde as basic chemicals from bioethanol.
- Acetaldehyde production
- Ethanol reforming
- Hydrogen production
ASJC Scopus subject areas
- Process Chemistry and Technology