Sun Lin1, Zhang Yan-xia1, Ye Na1, Wang Xiang-sheng1, Guo Hong-chen1 Li Chang-ming2, Li ji-chun2, Ma An2
(1. State Key Laboratory of Fine Chemicals, Dept. of Catalytic Chemistry and Engineering, Dalian University of Technology, Dalian, Liaoning 116012
2. Institute of Petrochemicals, PetroChina, Beijing 100007)
Abstract: In this paper, the framework thermostability of nano-sized HZSM-5 zeolite was studied via high-temperature calcination, and the regeneration performance of aromatization on nano-sized HZSM-5 catalyst was investigated via deactivation/coke-burning regeneration methods. The physicochemical properties of the zeolite and related catalyst samples were characterized by XRD, TG, FTIR, NH3-TPD and N2 physisorp, as well as H2-mediated fixed-bed aromatization of C4 liquefied petroleum gas (LPG). Results show that, the nano-sized HZSM-5 zeolite displays excellent framework thermostability, it can keep its crystal structure when calcined at 800°C in a muffle furnance (still air). In the H2-mediated aromatization of C4 LPG, the nano-sized HZSM-5 catalyst exhibits not only durable activity, but also repeatedly performance after regeneration. These results indicate that the nano-sized ZSM-5 zeolite is a promising industrial catalytic material.
Key words: nano-sized HZSM-5 zeolite, framework thermostability, physicochemical properties
E-mail: hongchenguo@163.com
Journal of Molecular Catalysis, Vol. 24, Issue 3, 2010, 202-207
