Supercritical water synthesis of bimetallic catalyst and its application in hydrogen production by furfural gasification in supercritical water

摘要

Supercritical water not only provides good solvent of biomass gasification but also causes catalyst agglomeration. Therefore, the supercritical water synthesis method was utilized to guarantee the stability of the catalyst. In order to take into account the advantages of different metal catalysts, bimetallic catalysts were prepared based on Ni, Co, Zn and Cu, with TiO2 as carrier. Hydrogen production by furfural gasification in supercritical water was conducted with different catalysts. The experimental results turned out that all combinations showed remarkable stability except for the combination Co + Ni. Zn + Ni and Cu + Zn showed better selectivity on hydrogen, and Co + Ni showed better carbon gasification efficiency. Spherical coke particles were obtained after the reaction with bimetallic catalysts, while the coke particles were amorphous after the reaction with K2CO3. (C) 2016 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.