非金属、第二金属改性对ZnZSM-5上丙烷芳构化的影响

AROMATIZATION OF PROPANE OVER ZnZSM-5 MODIFIED BY NON METAL AND SECOND METAL COMPONENTS

以 Zn ZSM- 5分子筛为基本研究对象 ,探讨了在不同金属 (Mg,Co,Cr,Mo等 )、非金属 (P,Cl,S等 )改性的X/ Zn ZSM- 5催化剂上 ,在 82 3K下的丙烷芳构化反应活性和芳烃的选择性。结果表明 ,在 Zn ZSM- 5分子筛上分别添加 Co,Cr,Mo,Mg均能不同程度地降低丙烷转化率 ,同时提高芳烃的选择性 ;在 P(wp=0 .5%)改性的 P/Zn ZSM- 5上芳烃选择性也有较大提高 ,并抑制了甲烷和乙烷的生成 。

Aromatization of propane over ZnZSM 5 catalysts modified by non metal (P, Cl, S) and second metal components (Co, Cr, Mo, Mg) at 823K was studied The results showed that the modification could enhance the selectivity of aromatics, but the conversion of propane was suppressed to certain extent The yield of aromatics could be slightly increased by the modification of 0 5%P The surface acidity of zeolite given by pyridine adsorption IR was discussed