溶剂对完全液相法制CuZnAl浆状催化剂结构和性能的影响.pdfVIP

学兔兔 化 工 进 展 · 2160· CHEMICAL INDUSTRY AND ENGINEERING PR0GRESS 2009年第28卷第l2期 溶剂对完全液相法制CuZnAl浆状催化剂结构和性能的影响 高志华，李俊芳，黄 伟，阴丽华，谢克昌 (太原理工大学煤科学与技术教育部和山西省重点实验室，山西 太原 030024) 摘 要：采用完全液相法，以拟薄水铝石为铝源，选择不同溶剂溶解催化剂前体硝酸铜和硝酸锌制备了CuZnA1 浆状催化剂，并采用x射线粉末衍射、氮吸附、x射线光电子能谱和程序升温还原对其进行了表征，考察了CuZnA1 浆状催化剂在合成气一步法合成二甲醚反应中的催化性能。结果表明，不同的溶剂对催化剂性能有显著的影响， 其中以乙二醇为溶剂制备的催化剂相结构稳定，孔径及孔体积最大，表面铜含量高，可还原铜量较多且还原温度 偏低，从而在保证DME选择性不变的条件下显著提高了催化剂CO转化率。 关键词：完全液相法；二甲醚；拟薄水铝石；乙二醇；合成气 中图分类号：0 643 文献标识码：A 文章编号：1000—6613(2009)12—2160—04 Effect of solvent on the structure and performance of CuZnAl catalyst prepared by complete liquid phase technology GAO Zhihua，LIJunfang，HUANG Wei，YINLihua，XIEKechang (Key Laboratory of Coal Science and Technology of Ministry of Education and Shanxi Province，Taiyuan University of Technology，Taiyuan 030024，Shanxi，China) Abstract：Al--based slurry catalysts using pseudo--boehmite as aluminum source were prepared by complete liquid phase technology,and the catalyst precursors Cu(NO3)2 and Zn(NO3)2 were dissolved in different solvents．The as—prepared catalysts were characterized by means of X—ray diffraction，N2 adsorption，Xray photoelectron spectroscopy and H2 temperature—programmed reduction．Performance of the catalysts was evaluated in a slurry reactor for the synthesis of dimethyl ether(DME)from syngas． Results indicated that different solvent has significant influence on the catalyst structure and perform ance．Using glycol as solvent，the catalyst shows a stable phase structure and largest pore