Pd/Al_2O_3气相催化丙烯腈制丙腈添加CaO的研究  

The Study of Gas Phase Hydrogenation of Acrylonitrile to Propionitrile over Supported Palladium Catalyst

作　　者：王法强[1] 徐祖辉[1] 周国光[1] 

机构地区：[1]上海师范大学生命与环境科学学院,上海200234

出　　处：《上海师范大学学报（自然科学版）》2002年第4期42-46,共5页Journal of Shanghai Normal University(Natural Sciences)

摘　　要：利用固定床连续反应装置,研究了钯催化剂对丙烯腈在常压下气相加氢制丙腈的催化性能。Pd/Al_2O_3催化剂对丙烯腈双键加氢选择性较高,没有检测出副产物。但催化活性随反应时间延长迅速降低,加入助剂CaO能提高催化剂的稳定性,延长催化剂寿命;CaO含量(wt)以30％时为最佳修饰量。结合XRD,SEM谱图探讨了CaO对催化剂性能的作用。并考察了反应条件对催化剂性能的影响。The capability of Pd/Al2O3 for gas phase hydrogenation of acrylonitrile to propionitrile under normal pressure have been investigated in a consecutive fixed - bed reactor. A high selectivity of propionitrile was obtained and no by- product was found. But the activity of the catalyst decreased with the reaction time. CaO-modified Pd/Al2O3 catalyst can keep Pd/Al2O3 from deactivation . The optimum quantity of modification CaO for the catalyst was 30 percent The influence of CaO on the capability of the catalyst was discussed according to XRD spectra and SEM images. The suitable reaction temperature,loading and H2/acrylonitrile molar ratio was found.

关 键 词：CAO 钯催化剂 催化活性 助剂 丙烯腈 丙腈 氧化钙 PD/AL2O3催化剂 气相加氢 

分 类 号：O623.761[理学—有机化学] O64[理学—化学]