【作者】 刘宪春； 韩秀文； 田鹏； 刘秀梅； 刘中民； 包信和；

【Author】 Xianchun LIU Xiuwen HAN Peng Tian Xiumei Liu Zhongmin Liu Xinhe BAO State Key Laboratory of Catalysis,Dalian Institute of Chemical Physics,CAS,Dalian 116023

【机构】 中国科学院大连化学物理研究所催化基础国家重点实验室；

【摘要】 <正>SAPO-56 是一种新型小孔硅磷铝分子筛．它是近几年才合成出来的一种新型材料．由于小孔分子筛 SAPO-34是甲醇转化制低碳烯烃反应(MTO)的良好催化剂,人们期望 SAPO-56分子筛在此类反应中也有很好的催化效果．SAPO 类型分子筛是在磷铝分子筛骨架上引入了硅原子,从而引进酸性位．再加上小孔分子筛的特殊择形性能, 从而对 MTO 反应起着重要的催化作用。通过在合成时加入不同的硅量以控制分子筛中酸性羟基的数量和骨架结构,试图找到一种稳定且酸量适合于 MTO 反应的分子筛．本文用多核 MAS NMR 方法,考察了 SAPO-56分子筛的热稳定性和酸性位的分布,为提高催化剂的性能提供了理论证据。更多还原

【Abstract】 SAPO-56 is a new microporous silicoaluminophosphate molecular sieve that is developed recently.SAPO-34 is a microporous molecular sieve and a catalyst for methanol-to-olefin conversion (MTO).People wish that similar with SAPO-34,SAPO-56 should be an analogical catalyst upon the MTO process.Substituting silicon into a neutral AIPO4 framework introduces Br6nsted acid sites for SAPO molecular seives.In addition,the shape selection of SAPO is very important for MTO process.Various silicon contents are added in synthesis to control the amount of bridge hydroxy and framework structures.The aim is to find the better catalyst on MTO process that possess steady structure and suitable acidic sites.The thermal stability and the distribution of acidic sites of SAPO-56 were estimated by multinuclear MAS NMR.They provided theoretical evidence for promoting the performance of catalyst.更多还原