SAPO-34分子筛的制备及其催化应用研究进展

SAPO-34分子筛的制备方法及其合成因素是影响其晶体形貌、晶粒大小、酸性质和孔道结构等物化性质的重要因素,与分子筛的催化性能密切相关。本文对比分析了常规水热合成法、微波辅助合成法、干胶转化合成法和无溶剂合成法的优缺点,并重点介绍了模板剂、硅铝比、水铝比、硅源铝源和金属改性等制备参数对SAPO-34分子筛物化性质及催化性能的影响;简要总结了其在甲醇制低碳烯烃、氨选择性催化还原NOx和烃类催化裂解制低碳烯烃等催化应用中的进展。本文为设计和制备新型、高效SAPO-34分子筛提供一定的借鉴意义和研究思路。

Advances in Preparation and Catalytic Applications of SAPO-34 Zeolites

The progress in preparation and catalytic applications of SAPO-34 zeolites was reviewed. The preparation methods and synthesis factors of SAPO-34 zeolites are important factors affecting its physicochemical properties such as crystal morphology, grain size, acidity and pore structure, which are closely related to the catalytic performance of SAPO-34 zeolites. In this paper, the advantages and disadvantages of conventional hydrothermal synthesis, microwave-assisted synthesis, dry gel conversion synthesis and solvent-free synthesis were compared and analyzed. The influences of preparation parameters, such as template agent, Si/Al ratio, water content, silicon source, aluminum source and metal modification on the physicochemical properties and catalytic performance of SAPO-34 zeolites were emphatically introduced. Its catalytic applications such as methanol to light olefins, ammonia selective catalytic reduction of NOx and hydrocarbon catalytic cracking to light olefins were briefly summarized. It provides some reference significance and research ideas for the design and preparation of new and efficient SAPO-34 zeolites.