Effective hydrogen production from ethanol steam reforming using CoMg co-doped SiO2@Co1−xMgxO catalyst

• Published in: Journal of industrial and engineering chemistry (Seoul, Korea) 2017, 51(0), , pp.140-152
• Main Authors: Kim, Kang Min, Kwak, Byeong Sub, Im, Younghwan, Park, No-Kuk, Lee, Tae Jin, Lee, Sang Tae, Kang, Misook
• Format: Article
• Language: English
• Subjects: Core@shell structure; Ethanol steam reforming; Hydrogen production; SiO2@Co1−xMgxO; 화학공학
• ISSN: 1226-086X; 1876-794X
• DOI: 10.1016/j.jiec.2017.02.025

[Display omitted] •The core@shell structured SiO2@Co1−xMgxO was prepared.•CO-WGS on the core@shell structured SiO2@Co1−xMgxO was promoted.•Carbon coke deposition was suppressed by Mg loading.•Both Co0 and Co2+ played the active sites on SiO2@Co1−xMgxO.•SiO2@Co1−xMgxO exhibited high hydrogen production. In this study, the activities of core@shell-structured SiO2@Co1−xMgxO catalysts in ethanol steam reforming (ESR) were investigated, and the promotion effect of Mg upon H2 production was assessed. The loading of SiO2@CoO with Mg resulted in an increase in ethanol conversion and H2 yield with the concomitant suppression of carbon coke deposition and CO emission. Oxygen transfer from the MgO supporter (or improver) to the main cobalt catalytic species during ESR might play a role in maintaining the partially oxidized Co state. In longevity tests, the SiO2@Co1−xMgxO core@shell material, despite being reused three times, exhibited superior H2 production for 100h without structural collapse or coke formation.