蒸汽重整
催化作用
制氢
双金属片
乙醇
氢
空间速度
化学
甲烷转化炉
水煤气变换反应
化学工程
核化学
材料科学
无机化学
有机化学
选择性
工程类
作者
Dong-Jin Kim,Byeong Sub Kwak,No‐Kuk Park,Gi Bo Han,Misook Kang
摘要
This study examined the effects of advanced bimetallic catalytic species of Ni and Mo on hydrogen production from ethanol steam reforming. NixMoy/SBA-15 exhibited significantly higher ethanol steam-reforming activity at mild temperatures than monometallic Ni/SBA-15; the highest activity was achieved using the Ni0.95Mo0.05/SBA-15 catalyst. H2 production and ethanol conversion were maximized at 70–87% and 90–92%, respectively, over the temperature range of 500 to 800 °C with an EtOH : H2O ratio of 1:3 and a gas hourly space velocity of 3000 h−1. This highlights the synergy between the Ni and Mo loading on SBA-15 during ethanol steam reforming through the inhibition of Ni particle agglomeration and the consequent decrease in catalytic deactivation. In the proposed mechanism for ethanol steam reforming, Mo oxide promotes CH4-steam reforming at lower temperatures and depresses the CO-water gas shift reaction. Overall, hydrogen production is significantly higher over NixMoy/SBA-15 than over monometallic Ni/SBA-15 despite the evolution of CO gas. Copyright © 2014 John Wiley & Sons, Ltd.
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