期刊
RSC ADVANCES
卷 8, 期 53, 页码 30387-30395出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c8ra04814b
关键词
-
资金
- National Nature Science Foundation of China [51301114, 21203125, 51602206]
- Natural Science Foundation of Liaoning Province [201602598, 2015020649]
- Science research Foundation of Education Department of Liaoning Province [LQ2017011, L2016003]
A series of CuO-ZnO-Al2O3/HZSM-5 hybrid catalysts with different Cu/Zn ratios and disparate Al2O3 doping were prepared and characterized by XRD, BET, H-2-TPR, NH3-TPD and XPS techniques. The optimal Cu/Zn ratio is 7:3, and the introduction of a suitable amount of Al2O3 to form hybrid catalysts increased the BET specific area and micropore volume, facilitated the CuO dispersion, decreased the CuO crystallite size, increased the interaction between CuO and ZnO, enhanced the number of weak acid sites, altered the copper chemical state and improved the catalytic performance consequently. The highest CO2 conversion, DME selectivity and DME yield of 27.3%, 67.1% and 18.3%, respectively, were observed over the CZA(7)H catalyst. The suitable temperature of 260 degrees C and the appropriate space velocity of 1500 h(-1) for one-step synthesis of dimethyl ether (DME) from carbon dioxide (CO2) hydrogenation were also investigated. The 50 h stability of the CZA(7)H catalyst was also tested.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据