介孔纳米HZSM-5分子筛的制备及其在MTG工艺中催化剂性能的研究  

Synthesis of mesoporous nano HZSM-5 zeolites and their catalytic performance in MTG reaction

作　　者：李永生 栾春晖[1] 齐江 黄伟[1] 王晓东[1] 

机构地区：[1]太原理工大学煤科学与技术重点实验室,山西太原030024

出　　处：《天然气化工—C1化学与化工》2017年第6期6-9,20,共5页Natural Gas Chemical Industry

基　　金：国家自然科学基金重点项目(21336006)

摘　　要：以单模板剂,采用水热晶化制备了介孔纳米HZSM-5催化剂。详细考察了铝源的水解碱度和超声波处理等合成液的制备条件对HZSM-5分子筛的结构和性能的影响。用XRD、N_2吸附-脱附、NH_3-TPD和TG等手段对催化剂进行表征,结果表明在较低的碱度下水解铝源,不采用超声处理合成液条件下制备的催化剂具有适中的结晶度,较大的介孔孔隙率,较多的中强酸和强酸量,更强的容炭能力。在甲醇制汽油(MTG)反应中,该催化剂的活性与稳定性较高,甲醇转化率接近100%,催化稳定期可达48h,液态烃选择性可达到57.90%。Mesoporous nano HZSM-5 catalysts were synthesized by hydrothermal crystallization with single template. The effect of the preparation parameters of synthesis mixture, including the alkalinity of hydrolyzing the aluminum source and the ultrasonic treatment, on the microstructure and properties of the HZSM-5 zeolite were investigated. XRD, N2 adsorption-desorption, NH3-TPD and TG were used to characterize the catalysts. The results show that the catalyst prepared by hydrolysis of aluminum source at lower alkalinity without ultrasonic treatment of synthesis solution possesses a moderate crystallinity, a larger mesoporosity, more amount of moderate strong acid and strong acid, and stronger ability of resistance to carbon deposition. In the methanol-to-gasoline （MTG） reaction, the catalyst as prepared has higher activity and stability, and could obtain a methanol conversion of close to 100% with an activity stable period of up to 48 h and a liquid hydrocarbon selectivity of up to 57.90%.

关 键 词：单模板剂 HZSM-5 甲醇制汽油(MTG) 

分 类 号：TQ426.61[化学工程] O643.3[理学—物理化学]