预处理条件对Zn/Al-CLM的丙烷芳构化性能的影响

INFLUENCES OF PRETREATMENT ON Zn/Al-CLM CATALYST FOR PROPANE AROMATIZATION

在脉冲微反装置上考察了不同的预处理条件对Zn Al CLM催化剂的丙烷芳构化反应的影响。结果表明 ,丙烷在Zn Al CLM催化剂上具有一定的的反应活性和芳烃选择性 ,而且芳构化主要转化为苯 ;载体Al CLM的焙烧温度、金属锌负载量、活化温度等对Zn Al CLM催化剂的丙烷芳构化性能具有重要影响。载体经 5 0 0℃预焙烧制备的Zn Al CLM催化剂具有最好的柱结构保留度 ,从而表现出最佳的芳构化性能 ;随着锌含量的增加 ,Zn Al CLM催化剂的酸量增大 ,从而使丙烷转化率增大 ,而选择性则是锌含量质量分数为 5 8%时具有极大值 ;4 0 0℃活化处理可使Zn与Al CLM之间具有适中的相互作用 ,从而使得Zn Al

The influences of different pretreatment of Zn/Al CLM catalysts on propane aromatization were carried out with a pulse flow fix bed reactor system The results show that the Zn/Al CLM catalyst show some activity of propane aromatization and can selectively convert propane to benzene The calcination temperature of Al CLM, Zn loading and activation temperature of Zn/Al CLM made much influence on propane aromatization Zn/Al CLM has the best structure and show the best armatization property when Al CLM was calcinated at 500?℃ for 2?h The more the Zn loading, the higher the propane conversion, and aromatics selectivity is the best with loading of 5 8% Zn The effect between Zn and Al CLM was well situated with activation treatment of Zn/Al CLM at 400?℃ in air flow for 2?h, and the yield of aromatics was the highest