高等学校化学学报2011，Vol.32Issue(6)：1360-1365,6.
完全液相法与溶胶-凝胶法制备Cu-Zn-Al双功能催化剂对浆态床一步法合成二甲醚的催化性能比较
Comparison of Catalytic Performances Between Complete Liquid-phase's Catalyst and Sol-gel's Catalyst for Slurry Synthesis Dimethyl Ether
摘要
Abstract
The Cu-Zn-Al bifunctional catalysts were prepared by complete liquid-phase(LP) method and solgel(SG) method, respectively. The properties of catalysts were characterized by X-ray diffraction, N2 adsorption-desorption experiment and X-ray photoelectron spectroscopy, and the catalytic performances of dimethyl ether(DME) synthesis directly from syngas in a slurry reactor over LP and SG catalysts were evaluated. The characterization results reveal that the Cu species and surface Cu content in LP and SG catalysts are quite different, but the corresponding texture properties are similar each other. The LP catalyst shows high selectivity and good stability, and its specific surface area, pore volume, surface Cu content and Cu/Zn molar ratio increase after reaction. The SG catalyst shows obvious deactivation, and average deactivation rate is 1.6％/d.The decrease in specific surface area, pore volume, surface Cu content and Cu/Zn molar ratio after reaction is probably the reason of catalyst deactivation.关键词
完全液相/溶胶-凝胶/浆态床/二甲醚/Cu-Zn-Al催化剂Key words
Complete liquid-phase/ Sol-gel/ Slurry reactor/ Dimethyl ether/ Cu-Zn-Al catalyst分类
化学化工引用本文复制引用
樊金串,黄伟,吉鹏..完全液相法与溶胶-凝胶法制备Cu-Zn-Al双功能催化剂对浆态床一步法合成二甲醚的催化性能比较[J].高等学校化学学报,2011,32(6):1360-1365,6.基金项目
国家自然科学基金(批准号:20706039,20471040)、国家"九七三"计划项目(批准号:2005CB221204)和山西省自然科学基金(批准号:2009011059-13)资助. （批准号:20706039,20471040）
