微量吸附量热技术在Zn_xCo_(1-x)Cr_2O_4催化剂筛选上的应用  

Application of the Microcalorimetric Adsorption Technique on Screening of Zn_xCo_(1-x)Cr_2O_4 Catalysts

作　　者：张晓丰[1,2] 杨胥微[1] 周静[3] 王艳力[1] 张文祥[1] 吴通好[1] 

机构地区：[1]吉林大学化学学院,吉林长春130021 [2]吉林省石油化工设计研究院,吉林长春130021 [3]吉林大学白求恩医学院,吉林长春130021

出　　处：《分析科学学报》2009年第3期267-271,共5页Journal of Analytical Science

基　　金：国家自然科学基金(No.20403006);吉林省科技发展规划项目(No.20040563)

摘　　要：采用共沉淀法制备了一系列ZnxCo1-xCr2O4催化剂,并将其进行了微量吸附量热技术测定,及苯酚与甲醇邻位烷基化反应的应用性实验。结果证明,ZnxCo1-xCr2O4催化剂上苯酚和甲醇邻位烷基化反应的活性中心应是酸碱的协同作用产生的,ZnxCo1-xCr2O4系列催化剂中的Zn/Co的最佳比例为Zn/Co=1。运用微量吸附量热技术实现了对ZnxCo1-xCr2O4系列催化剂的优化。A series of ZnxCo1-xCr2O4 catalysts were prepared by co-precipitation method, and they were measured by microcalorimetric adsorption technique. In addition, the applied experiments of orthoselective alkylation of phenol with methanol were performed. The results show that ortho-selective alkylation active centers of phenol with methanol on ZnxCo1-xCr2O4 catalysts are produced by synergistic effects of acidities and basicities. Moreover, the best composition ratio of Zn/Co in ZnxCo1-xCr2O4 catalysts is 1 ： 1.

关 键 词：微量吸附量热 铬酸钴 酸中心 碱中心 

分 类 号：O657[理学—分析化学]