Hydrogen production by oxidative steam reforming of methanol over Au/CeO₂ catalysts

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• 作者：Chinchanop Pojanavaraphan^a ; Apanee Luengnaruemitchai^a ; ^b ; ^{apanee.l@chula.ac.th} ; Erdogan Gulari^c
• 关键词：Oxidative steam reforming ; Methanol ; Hydrogen ; Au catalyst ; CeO2
• 刊名：Chemical Engineering Journal
• 出版年：2012
• 期刊代码：16_13858947
• 类别：ce
• 出版时间：1 June, 2012
• 卷：192
• 期：Complete
• 页码：105-113
• 文件大小：1358 K

摘要

The production of hydrogen by oxidative steam reforming of methanol (OSRM) was investigated over a series of Au/CeO₂ catalysts prepared by deposition-precipitation. The optimum operating conditions over 5 wt%Au/CeO₂ (calcined at 400 掳C, GHSV = 30 000 mL/h-g_cat, T = 300 掳C, H₂O/CH₃OH molar ratio = 2/1, and O₂/CH₃OH molar ratio = 1.25/1) could be suggested to obtain 100%methanol conversion and 24.5%hydrogen yield. Additionally, the Au catalyst having an average particle size of 10.04 nm and the highest amount of Au⁰ species (active sites for the OSRM reaction) on the catalyst support exhibited the highest activity. Based on the stability observation, the catalyst exhibited high catalytic activity over a long period, even though catalyst deactivation caused by both coke formation and sintering was found.