加氢除炔和液相烷基化双功能催化剂的研究开发

Development of a bifunctional catalyst for acetylene hydrogenation and liquid phase alkylation

利用离子交换法负载贵金属钯,对β沸石FX-01催化剂进行改性,制成具有加氢除炔及烷基化双重催化功能的新型沸石催化剂,以提高催化剂对原料的适应性并延长催化剂的寿命。采用加速失活的方法进行寿命实验,通过热重分析和气相色谱-质谱(GC-MS)对积炭进行表征。实验结果表明,改性后的催化剂选择性和稳定性提高,异丙基苯的收率增加;钯元素改性制成的双功能催化剂具有较好的抗积炭性能,催化剂寿命延长,钯元素适宜的负载量为0.2%。

A new bifunctional catalysts for acetylene hydrogenation and liquid phase alkylation was prepared by incorporating palladium into FX-01 β zeolite via ion exchange, so as to improve its adaptability to feedstock and increase its service life. Service life of the catalyst was tested by accelerated deactivation. Coke formed on the deactivated catalyst was characterized by TG and GC-MS. The results showed that selectivity and stability of the catalyst were greatly enhanced and yield of cumene was increased after the modification. The catalyst modified by incorporating palladium exhibited higher resistance to coke formation and longer service life; appropriate content of supported palladium was preferably 0.2% （mass fraction）.