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有机硅烷辅助合成特殊形貌SAPO分子筛
引用本文:王冶,张晓思,孙丽婧,李冰,刘琳,杨淼,田鹏,刘仲毅,刘中民.有机硅烷辅助合成特殊形貌SAPO分子筛[J].高等学校化学学报,2021,42(3):683-690.
作者姓名:王冶  张晓思  孙丽婧  李冰  刘琳  杨淼  田鹏  刘仲毅  刘中民
作者单位:郑州大学化学学院,绿色催化研究中心,郑州450001;中国科学院大连化学物理研究所甲醇制烯烃国家工程实验室,洁净能源国家实验室,大连116023;中国科学院大连化学物理研究所甲醇制烯烃国家工程实验室,洁净能源国家实验室,大连116023;郑州大学化学学院,绿色催化研究中心,郑州450001
基金项目:国家自然科学基金(批准号:21676262,21991090,21991091);中国科学院大连化学物理研究所创新研究基金(批准号:DICP I201909)资助.
摘    要:以异丙胺(IPA)为模板剂, 3-哌嗪基丙基甲基二甲氧基硅烷(PZPMS)为助剂, 水热合成出由纳米片组装而成的鸟巢状SAPO-5和纳米晶组装体SAPO-34. 考察了模板剂、 有机硅烷和硅投料量对晶化的影响, 发现合成产品的晶相和形貌随有机硅烷的添加依次变为SAPO-14, SAPO-5和SAPO-5/SAPO-34的混相. 固定PZPMS的量不变, 产物晶相随硅烷投料量的增加从SAPO-5逐渐转变成SAPO-34分子筛. 对合成的特殊形貌SAPO分子筛进行了表征, 并结合对比实验揭示PZPMS与IPA的复配是获得特殊形貌SAPO分子筛的关键. 此外, 所制备的SAPO-34样品由于良好扩散传质性能, 在甲醇制烯烃(MTO)反应中显示了优异的催化性能, 乙烯加丙烯选择性最高可达86.95%.

关 键 词:SAPO分子筛  形貌调控  有机硅烷  水热合成
收稿时间:2020-09-09

Morphology Control of SAPO Molecular Sieves under the Assistance of Organosilane
WANG Ye,ZHANG Xiaosi,SUN Lijing,LI Bing,LIU Lin,YANG Miao,TIAN Peng,LIU Zhongyi,LIU Zhongmin.Morphology Control of SAPO Molecular Sieves under the Assistance of Organosilane[J].Chemical Research In Chinese Universities,2021,42(3):683-690.
Authors:WANG Ye  ZHANG Xiaosi  SUN Lijing  LI Bing  LIU Lin  YANG Miao  TIAN Peng  LIU Zhongyi  LIU Zhongmin
Institution:1.Green Catalysis Center,College of Chemistry,Zhengzhou University,Zhengzhou 450001,China;2.National Engineering Laboratory for Methanol to Olefins,Dalian National Laboratory for Clean Energy,Dalian Institute of Chemical Physics,Chinese Academy of Sciences,Dalian 116023,China
Abstract:SAPO-5 and SAPO-34 molecular sieves with special morphology were synthesized by employing isopropylamine(IPA)as the organic-structure directing agent and 3-piperazinylpropylmethyldimethoxysilane(PZPMS)as a mesoporogen.The effects of the amounts of organosilane and silica source were systematically investigated which may change both crystalline phase and the crystal morphology.The products were SAPO-14,SAPO-5 and SAPO-5/SAPO-34 in turn as the addition and increase of PZPMS.SAPO-5 will transfer to SAPO-34 with the increased dosage of TEOS.The synthesized samples were well characterized,and the presence of PZPMS in the product was confirmed.Hierachical channels formed after removal of the organics,and the MTO catalytic performance of SAPO-34 molecular sieve was significantly improved.Furthermore,it exhibited 86.95%selectivity for ethylene and propylene.The hydrogen bond interaction between PZPMS and IPA is the key to synthesize SAPO with special morphology.This work provides an effective strategy to control the morphology of SAPO molecular sieves.
Keywords:SAPO molecular sieve  Morphology control  Organosilane  Hydrothermal synthesis
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