燃料化学学报Issue(10)：1221-1229,9.
酸碱性硅溶胶对浆状Cu/Zn/Al催化剂性能的影响
Influence of acid and alkaline silica sol on the performance of Cu/Zn/Al slurry catalysts
摘要
Abstract
A series of Cu/Zn/Al/Si slurry catalysts were prepared by the complete liquid-phase technology with acid and alkaline silica sol in the paper. The catalysts are characterized by means of XRD, H2-TPR, FT-IR, BET, NH3-TPD, XPS and TEM. When the acid silica sol is added, which has the similar environment with the process of precursor preparation, the conversion of CO and selectivity of dimethyl ether reach maxiumum, being 65. 38% and 76. 26% respectively. The acid silica sol weakens the force between Cu and other components, resulting in the Cu component is easy to be reduced and more active lattice planes of Cu0 on the catalyst are exposed. The acid/alkaline properties of silica sol influence acid site strength and the number of acid sites of catalysts and make both strong acidic sites and the weak acidic sites migrate to lower temperature position. In DME synthesis reaction, it is found that the acid silica sol can increase the ratio of the weak acidic sites to the strong acidic sites on the catalysts, which promotes dehydration performance of methanol and the selectivity of DME. In addition, the catalysts with large specific surface area and mesoporous pore structure are favorable for the activity and selectivity of DME.关键词
完全液相法/酸碱性/硅溶胶/二甲醚/Cu/Zn/Al催化剂Key words
complete liquid-phase technology/acid and alkaline/silica sol/dimethyl ether/Cu/Zn/Al catalysts分类
化学引用本文复制引用
孙凯,张小雨,张琳,边仲凯,黄伟,赵志换..酸碱性硅溶胶对浆状Cu/Zn/Al催化剂性能的影响[J].燃料化学学报,2015,(10):1221-1229,9.基金项目
The project was supported by the National Natural Science Foundation of China (21336006), General Program of National Natural Science Foundation of China (21176176), and Research Fund for the Doctoral Program of Higher Education of China(20111402130002).@@@@国家自然科学基金重点项目(21336006),国家自然科学基金面上项目(21176176)和高等学校博士学科点专项(优先发展领域)(20111402130002)资助 （21336006）
