多级孔道沸石用于甲醇制丙烯反应研究进展

摘要

Recent research progress of hierarchical zeolites is reviewed with respect to their structures,properties and synthesis.Due to the insertion of mesoporous,the yield and selectivity of target products are improved,thus the hierarchical zeolites have large potential applications in catalysis.The synthesis of hierarchical zeolites using two kinds of molecular sieve is discussed,especially the methods of post-processing and templating.The degree of desilication or dealumination,and suitable but cheap templates are essential techniques to develop hierarchical zeolite materials.The application prospect of hierarchical zeolites in methanol to propylene reaction is discussed,and an appropriate ratio of micro/ mesopores,appropriate distribution as well as intensity of catalyst are the key issues for its application.%综述了多级孔道沸石结构、性能及制备方法的最新研究进展。多级孔道沸石因为介孔的引入强化了分子在孔道内的扩散,提高了目标产物的收率和选择性,在催化反应领域具有非常大的应用潜力。针对ZSM-5和SAPO-34两种不同的分子筛体系,介绍了多级孔道沸石制备的后处理法与模板法,指出控制后处理脱硅脱铝的程度以及探寻合适且廉价的模板剂是发展多级孔道材料的关键技术。最后对多级孔道沸石在甲醇制丙烯反应中的应用前景作了展望,得出保证分子筛合理的微孔/介孔比例、分布及催化剂合适的强度,是该材料应用于甲醇制丙烯反应的关键。