采用3-氨丙基三乙氧基硅烷（KH-550）为刻蚀剂制备了KH-550-HZSM-5系列催化剂，利用XRD、SEM、NH₃-TPD、FT-IR表征手段对催化剂的结构、形貌及酸性变化进行测试，并在固定床中进行催化MTO反应的性能评价。结果表明，从催化剂性能及经济性评估，KH-550^0.3-HZSM-5催化剂在温度为490℃、常压、氮气流量为20 mL/min、WHSV=1.08 h^-1、催化剂质量为0.5 g、石英砂质量为5 g条件下，甲醇的转化率为100%，乙烯和丙烯的总选择性约为64.95%，烯烃总选择性为85.90%；然而，与HZSM-5相比，C₉⁺的总选择性从22.03%降到7.12%。

KH-550-HZSM-5 series catalysts are prepared by using 3-aminopropyl triethoxysilane (KH-550) as etching agent.The structure,morphology and acidity of the catalysts are measured by means of XRD,SEM,NH₃-TPD and FT-IR characterizations,and the performance in catalytic MTO reaction is evaluated in a fixed bed.It is shown from the comprehensive evaluation of performance and economy of the catalysts that the conversion rate of methanol can reach 100%,total selectivity of ethylene and propylene can reach around 64.95%,and total selectivity of olefins can reach 85.90% when the temperature remains at 490℃,the pressure is atmospheric,nitrogen flow is 20 mL·min^-1,WHSV=1.08 h^-1,5 g of quartz sand is used and 0.5 g of the catalyst that is prepared by using 0.3 g of KH-550 is added.Compared with that over HZSM-5,total selectivity of C₉+ over KH-550-HZSM-5 drops from 22.03% to 7.12%.

王小瑞(1985-),女,硕士,讲师,研究方向为工业催化,ruier8584@sina.com