片层SAPO-34分子筛的合成、表征及其在甲醇制烯烃(MTO)中的催化性能  

Synthesis and Characterization of SAPO-34 Molecular Sieve With Lamellar Morphology and Its Catalytic Performance in MTO Reaction

作　　者：王龙[1] 李晓峰[1] 王平[1] 狄春雨[1] 景超[1] 梁光华[1] 窦涛[1,2] 

机构地区：[1]太原理工大学精细化工研究所,山西太原030024 [2]中国石油大学中国石油天然气集团催化重点实验室,北京102249

出　　处：《石油学报（石油加工）》2016年第2期355-361,共7页Acta Petrolei Sinica(Petroleum Processing Section)

基　　金：国家重点基础研究发展计划"973"项目(2004CB217806);国家自然科学基金项目(20973123)资助

摘　　要：以SAPO-34分子筛母液中的微晶作为晶种,在水热体系中成功合成了片层结构SAPO-34分子筛,且母液可以多次循环使用。采用X射线衍射(XRD)、扫描电子显微镜(SEM)、N_2等温吸附-脱附(BET)、NH3程序升温脱附(NH+3-TPD)等技术对合成的SAPO-34分子筛样品进行了表征和分析,并评价了其对MTO反应的催化性能。结果表明,与立方结构的SAPO-34分子筛相比,使用母液合成的片层结构SAPO-34分子筛样品的结晶度、比表面积略低,酸性、水热稳定性相当。在450℃、3.0h-1的条件下,片层结构的SAPO-34分子筛在催化MTO反应中拥有更长的寿命,同时缩短了MTO反应的诱导期。SAPO-34 molecular sieve with laminar morphology was successfully synthesized in hydrothermal system,by using the microcrystalline in the mother liquor of SAPO-34 molecular sieve as seed,and the mother liquor can be recycled for many times.The synthesized samples were characterized and analyzed by XRD,SEM,BET, NH3-TPD technologies,and its catalytic performance in MTO reaction was evaluated.The results showed that the crystallinity and the specific surface area of the SAPO-34 with laminar morphology were only slightly lower than those of the cubic SAPO-34 molecular sieve,and their acid and the water thermal stability were the same.For MTO reaction in the condition of 450 ℃ and 3.0h^-1,laminated structured SAPO-34 has a longer lifetime than the cubic one,at the same time,the induction period of MTO reaction was shortened.

关 键 词：SAPO-34 母液 片层 MTO 

分 类 号：TQ426.61[化学工程]