无粘结剂成型的Zn/ZSM-5催化剂上混合碳四烃类芳构化反应性能  

Aromatization of Mixed C_4 Hydrocarbons over the Binderless Zn/ZSM-5 Catalyst

作　　者：李玉宁[1] 任丽萍[1] 李亚男[1] 金照生[1] 滕加伟[1] 杨为民[1] 

机构地区：[1]中国石油化工股份有限公司上海石油化工研究院,上海201208

出　　处：《催化学报》2011年第6期992-996,共5页

摘　　要：制备了无粘结剂成型的Zn/ZSM-5分子筛催化剂,并与机械压片和引入氧化铝或氧化硅粘结剂成型的催化剂相比较,采用N2-物理吸附-脱附、扫描电子显微镜、NH3-程序升温脱附、吡啶吸附红外光谱和X射线光电子能谱等手段对催化剂进行了表征,并评价了催化剂上混合碳四烃类芳构化反应性能.结果表明,相对于机械压片和引入粘结剂成型的催化剂,采用无粘结剂成型的Zn/ZSM-5催化剂具有较大的比表面积,负载的Zn物种分布更加均匀,因而在混合碳四烃类芳构化过程中表现出较高的催化活性和稳定性.Four Zn/ZSM-5 catalyst samples were prepared by mechanical pressing,introducing binder of aluminum oxide,introducing binder of silicon oxide,and binderless molding,respectively.The samples were characterized by N2 physical adsorption,scanning electron microscopy,NH3 temperature-programmed desorption,pyridine Fourier transform infrared spectroscopy,and X-ray photoelectron spectroscopy and were evaluated by aromatization of mixed C4 hydrocarbons.The results indicated that,compared with the mechanical pressed catalyst and the shaped catalyst samples with binders,the binderless Zn/ZSM-5 sample possessed higher specific surface area,accommodated more Zn species inside the zeolite crystals,and showed better catalytic performance in the aromatization of mixed C4 hydrocarbons.

关 键 词：无粘结剂 锌 ZSM-5分子筛 负载型催化剂 混合烃类 芳构化 

分 类 号：O643.32[理学—物理化学]