碳化糖类辅助合成多级孔SAPO-34分子筛及其催化性能  

Carbonized sugars-assisted synthesis of hierarchical SAPO-34molecular sieve and its catalytic performance

作　　者：狄春雨 任雅梅 虎英俊 张燕挺 DI Chunyu;REN Yamei;HU Yingjun;ZHANG Yanting(Shenzhen Keguan Huatai New Material Technology Co.,Ltd,Shenzhen 518000,Guangdong,China;Taiyuan No.21 Middle School,Taiyuan 030000,Shanxi,China;State-owned Assets Management Office,Taiyuan University of Technology,Taiyuan 030024,Shanxi,China)

机构地区：[1]深圳科冠华太新材料技术有限公司,广东深圳518000 [2]太原市第二十一中学校,山西太原030000 [3]太原理工大学国有资产管理处,山西太原030024

出　　处：《工业催化》2025年第2期70-75,共6页Industrial Catalysis

摘　　要：以无毒廉价的碳化糖类(如蔗糖和淀粉)为硬模板剂成功合成出多级孔SAPO-34分子筛,采用XRD、N_(2)吸附-脱附和SEM等技术对催化剂进行了表征,进一步在固定床反应器上考察了碳化糖类模板剂对多级孔SAPO-34分子筛催化性能的影响。结果表明,碳化糖类硬模板剂能够提升SAPO-34分子筛的外比表面积和介孔孔体积。与参比样品SAPO-34分子筛相比,多级孔SAPO-34分子筛在甲醇制备低碳烯烃(MTO)的反应中表现出明显的优势,催化寿命延长了两倍以上,双烯最高选择性提高了5%。Hierarchical SAPO-34 molecular sieves were successfully synthesized using non-toxic and cheap carbonated sugar(such as sucrose and starch)as hard template and characterized by XRD,N_(2) adsorption-desorption and SEM.The effects of carbonated sugar hard template on the catalytic performance of hierarchical SAPO-34 molecular sieve were studied in a fixed bed reactor.The results showed that introduction of carbonated sugar hard template could increase the external specific surface area and mesoporous volume of SAPO-34 zeolites.Compared with traditional SAPO-34,hierarchical SAPO-34 molecular sieves exhibited significant superiority in the methanol-to-olefin(MTO)reaction,the catalytic lifetime was extended by more than two times,and the maximum selectivity of ethylene and propylene was increased by 5%.

关 键 词：催化化学 SAPO-34 多级孔分子筛 硬模板剂 甲醇制烯烃 

分 类 号：O643.36[理学—物理化学] TQ426.6[理学—化学]