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用机械混合法制备了ZnO/HZSM 5丙烷芳构化催化剂 .X射线衍射与透射电镜测试结果表明 ,沸石表面的ZnO在焙烧后发生了分散和迁移 .稀盐酸对沸石表面锌的反交换实验结果表明 ,有部分锌迁入沸石孔道并与沸石表面发生了相互作用 .用X射线光电子能谱和吡啶吸附的红外光谱技术对ZnO/HZSM 5进行了表征 ,结果进一步表明有部分ZnO与HZSM 5发生固相离子交换反应 .对HZSM 5和ZnO/HZSM 5催化剂的丙烷芳构化活性进行了评价 ,讨论了锌物种在丙烷芳构化反应中的作用
ZnO / HZSM 5 propane aromatization catalyst was prepared by mechanical mixing method.The results of X-ray diffraction and transmission electron microscopy showed that the ZnO on zeolite dispersed and migrated after roasting.Experimental results of the exchange reaction of dilute hydrochloric acid on the surface of zeolite It is indicated that some zinc moves into zeolite pores and interacts with the zeolite surface.The ZnO / HZSM 5 has been characterized by X-ray photoelectron spectroscopy and pyridine adsorption infrared spectroscopy.The results further indicate that some ZnO and HZSM 5 occur Solid phase ion exchange reaction.The propane aromatization activity of HZSM 5 and ZnO / HZSM 5 catalysts was evaluated and the role of zinc species in propane aromatization was discussed