SAPO系磷铝分子筛的晶化及其复合催化剂对CO加氢的影响  

Crystallization of SAPO Series Silicoaluminophosphate Zeolites and Effect of Their Composite Catalysts on CO Hydrogenation

作　　者：刘振新 贾高鹏 田红美 赵晨曦 高玉集 邢宇 LIU Zhen-xin;JIA Gao-peng;TIAN Hong-mei;ZHAO Chen-xi;GAO Yu-ji;XING Yu(Henan Provincial Key Laboratory of Surface and Interface Science,School of Materials and Chemical Engineering,Zhengzhou University of Light Industry,Zhengzhou,450002,China)

机构地区：[1]郑州轻工业大学材料与化学工程学院,河南省表界面科学重点实验室,河南郑州450002

出　　处：《分子催化》2020年第5期436-445,共10页Journal of Molecular Catalysis(China)

基　　金：国家自然科学基金资助项目(21571161);河南省高等学校重点科研项目资助计划(20A150044);省属高校基本科研业务费专项资金项目(19KYYWF0402);郑州轻工业大学博士科研基金(2016BSJJ034/CLY20170069/LZX2016)。

摘　　要：探索了机械搅拌、配料组成、晶化参数等因素对SAPO-34和SAPO-5磷铝分子筛水热合成的影响,考察了混粒(颗粒混合)工艺和研粉(粉体研磨)工艺对"磷铝分子筛/尖晶石"复合催化剂制备的影响.与SAPO-34分子筛相比,SAPO-5分子筛晶体对机械作用的耐受性较强.用XRD、N2物理吸附、FESEM、EDS研究了材料的结构和织构特征.对比了4种复合催化剂的CO催化加氢性能.能够使复合催化剂更加抑制C—C偶合、从而更富产低碳烃的物相次序为:SAPO-34>SAPO-5>"ZnAlCrO4"尖晶石相.能够使复合催化剂具有更高CO加氢活性(即CO转化率)的物相次序为:"ZnAlCrO4"尖晶石相>SAPO-34>SAPO-5.The effects of mechanical stirring,ingredient composition and crystallization parameters on hydrothermal synthesis of SAPO-34 and SAPO-5 silicoaluminophosphate zeolites were investigated.The effects of granule-mixing process and powder-grinding process on the preparation of"silicoaluminophosphate zeolite/spinel"composite catalysts were investigated.Compared with SAPO-34 zeolite,SAPO-5 zeolite crystals exhibited stronger tolerance to mechanical action.XRD,N2 physical adsorption,FESEM and EDS were employed to investigate the structure and texture features of the materials.The catalytic performance of four composite catalysts for CO hydrogenation was compared.The sequence of phases which can make a composite catalyst more suppress C—C coupling and produce more light hydrocarbons is:SAPO-34>SAPO-5>"ZnAlCrO4"spinel phase.The sequence of phases that can make a composite catalyst have higher CO hydrogenation activity(i.e.,CO conversion)is:"ZnAlCrO4"spinel phase>SAPO-34>SAPO-5.

关 键 词：加氢 催化剂 费托 分子筛 晶化 

分 类 号：TQ426.64[化学工程]