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Methanol Steam Reforming over Na-Doped ZnO-Al2O3 Catalysts
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作者 Di Liu Yong Men +2 位作者 Jinguo Wang Xin Liu Qiuyan Sun 《American Journal of Analytical Chemistry》 2016年第7期568-575,共8页
In this study, the catalyst composition in binary ZnO-Al<sub>2</sub>O<sub>3</sub> catalyst was initially evaluated and optimized for methanol steam reforming. Then different Na contents were lo... In this study, the catalyst composition in binary ZnO-Al<sub>2</sub>O<sub>3</sub> catalyst was initially evaluated and optimized for methanol steam reforming. Then different Na contents were loaded by an incipient wetness impregnation method onto the optimized ZnAl catalyst. It was found that the activity was greatly enhanced by the modification of Na, which depended on the Na content in the catalyst. The methanol conversion was 96% on a 0.1 Na/0.4 ZnAl catalyst (GHSV = 14,040 h<sup>-</sup><sup>1</sup>, S/C = 1.4, 350°C), which was much higher with respect to a Na-free 0.4 ZnAl catalyst (74%). The remarkable improvement of activity was attributed to a weakening of the C-H bonds and clear of hydroxyl group by the Na dopant leading to an accelerated dehydrogenation of the reaction intermediates formed on ZnAl<sub>2</sub>O<sub>4</sub> spinel surface and thus the overall reaction. 展开更多
关键词 Methanol Steam Reforming Hydrogen Production ZnO-Al2O3 Catalyst na-promotion Activity
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