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随着芳烃需求量的增加,低分子烃的芳构化受到广泛重视.由于HZSM-5的独特骨架结构及酸性,使其对低分子烃有良好芳构化性能~[1~3],但研究工作大多放在HZSM-5本身的硅铝比调变及加入某些金属(如Ga,Zn)来提高其芳构化性能~[4~7],而以非金属对其进行改性处理则很少见.本文以Si(CH_3)_3CI对HZSM-5进行CVD处理,并对其酸性及对正已烷芳构化能力进行了考察,研究了催化剂的结焦情况.
With the increasing demand of aromatics, the aromatization of low molecular weight hydrocarbons has received more and more attention.Because of the unique structure and acidity of HZSM-5, it has good aromatization properties for low molecular weight hydrocarbons [1-3] Much attention has been devoted to improving the aromatization performance of HZSM-5 by changing the ratio of Si / Al and adding some metals such as Ga and Zn [4-7], and modifying it with nonmetal It is very rare.In this paper, HZSM-5 was treated by CVD with Si (CH_3) _3CI, and the acidity and para-aromatization of n-hexane were investigated. The coke formation of the catalyst was investigated.