甲醇制芳烃反应中ZSM-5催化剂改性技术

芳烃是种重要的化工原料,在众多领域得到广泛应用。随着甲醇生产技术的成熟,甲醇制芳烃工艺已经成为现阶段非石油路线合成轻质芳烃的重要途径。目前,甲醇制芳烃工艺中常用的催化剂为ZSM-5分子筛,但仍需对分子筛进行合适的后处理改性操作如调变分子筛酸性、活性中心位点和孔道结构等,以提高芳烃收率及特定产品的选择性。综述了甲醇制芳烃反应中ZSM-5分子筛催化剂负载法、碱处理法、酸处理法和水热处理法等改性技术研究进展,以期达到工业化要求,最终实现甲醇制芳烃工艺的工业化发展。

Modification technology of ZSM-5 zeolite catalysts for the conversion of methanol to aromatics

Aromatics is a kind of basic material of chemical industry,which has been widely applied in many industry fields.As methanol production technology advancing,methanol to aromatics(MTA) technology has become the important way of non-oil route of synthesis of light aromatic hydrocarbons at present.ZSM-5 zeolite is commonly used as the catalyst in MTA process,but it still needs appropriate post-processing in molecular sieve modified operation.The aromatics yield and the selectivity to the particular product can be improved by the modulation of molecular sieve acidity,active center sites and channel structures.The research progress in modification technologies of ZSM-5 molecular sieve catalyst,including load,alkali treatment,acid treatment and hydrothermal treatment were reviewed,expecting to meet the requirement of industrialization,and finally achieve the industrialization of MTA process.