摘要
利用水热及溶胶-凝胶两种方法制备不同组成的AlPO4催化剂。应用XRD、NH3-TPD等手段对催化剂进行了表征。试验表明催化剂结构及表面酸性与其制备方法、焙烧温度及n(P)/n(Al)比密切相关。乙醛和丙二醇的缩醛化反应表明丙二醇的转化率主要受催化剂表面弱酸度的影响。当n(P)/n(Al)为1.0,焙烧温度为400℃,用溶胶-凝胶法制备的AlPO4催化剂活性最高。
AIPO4 catalysts with different n （P）/n （Al） were prepared using hydrothermal and sol-gel method, respectively, and were characterized by means of XRD and NH3-TPD. Results showed that the preparation method, the calcination temperature and n（P）/n（Al） had effect on the structure of catalyst and the surface acidity. The conversion of propylene glycol was mainly affected by the surface acidity of the catalyst. When n （P）/n（Al） was 1.0, calcination temperature was 400 ℃, AIPO4 prepared by sol-gel method has the highest catalytic activity.
出处
《化学工业与工程》
CAS
2009年第3期199-202,共4页
Chemical Industry and Engineering
