Chinese Journal of Catalysis ›› 2018, Vol. 39 ›› Issue (1): 181-189.DOI: 10.1016/S1872-2067(17)62985-1

• Articles • Previous Articles    

Ceria-modified hierarchical Hβ zeolite as a robust solid acid catalyst for alkenylation of p-xylene with phenylacetylene

Yongle Guoa, Yu Zhangb, Zhongkui Zhaoa   

  1. a State Key Laboratory of Fine Chemicals, Department of Catalysis Chemistry and Engineering, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, Liaoning, China;
    b Department of Physical Education, Dalian University of Technology, Dalian 116024, Liaoning, China
  • Received:2017-10-12 Revised:2017-11-24 Online:2018-01-18 Published:2018-01-19
  • Contact: 10.1016/S1872-2067(17)62985-1
  • Supported by:

    This work was supported by the National Natural Science Foundation of China (21276041, U1610104) and the Chinese Ministry of Education via the Program for New Century Excellent Talents in University (NCET-12-0079).

Abstract:

A ceria-modified hierarchical Hβ zeolite was prepared by a desilication-dealumination procedure followed by ceria modification. The catalytic performance of the ceria-modified and unmodified hierarchical Hβ zeolite catalysts for alkenylation of p-xylene with phenylacetylene was investigated. Various characterization techniques, including X-ray diffraction, X-ray fluorescence, nitrogen adsorption-desorption, and NH3 temperature-programmed desorption, were used to examine the structure-performance relationships. Our results show that the optimized ceria-modified hierarchical Hβ zeolite catalyst demonstrated higher catalytic activity, selectivity, and stability for alkenylation of p-xylene with phenylacetylene than those of pristine Hβ zeolite. This performance was attributed to more acidic sites and improved accessibility to active sites through larger pores, together with a higher mesoporous surface area and volume resulting from the hierarchical pore architecture and ceria modification. Thus, our 5 wt% CeO2-Hβ-B0.2A0.2 catalyst shows great potential for producing alkenyl aromatics through solid acid catalyzed alkenylation.

Key words: Hierarchical beta zeolite, Desilication and dealumination, Ceriamodification, Heterogeneous catalysis, Alkenylation