生物质甲醇/二甲醚制烯烃中分子筛的合成与改性研究进展OA北大核心CSTPCD

This article summarizes the types and performance characteristics of molecular sieves that play a catalytic role in the production of olefins from biomass methanol/dimethyl ether(MTO/DTO),and the synthesis and modification methods of ZSM-5 molecular sieves and SAPO-34 molecular sieves are described.The synthesis methods such as hydrothermal synthesis,template free synthesis,microwave synthesis,dry gel synthesis,solvent-free synthesis,ionothermal method,ultrasonic method,etc.,as well as the modification methods such as changing the silicon aluminum ratio,metal modification,non-metallic modification,alkali modification,hydrothermal treatment modification,acid modification,amination modification,fluoride treatment modification,etc.were emphatically analyzed.At present,the synthesis and modification methods of molecular sieves still have insufficient control over their performances.While,the performance of molecular sieves is closely related to their structure and acidity.Regulating the structure and acidity of molecular sieves can further improve their catalytic performance and synthesis efficiency,prolong their catalytic life,reduce the process cost of methanol/dimethyl ether production,and minimize environmental hazards.