Catalytic conversion of n-butane over Au-Zn-modified nano-sized HZSM-5

doi:10.1016/S1872-2067(12)60539-7

Abstract

Abstract:

An Au-Zn-modified HZSM-5 catalyst was prepared using deposition-precipitation and wet impregnation methods. To obtain a better understanding of the relationship between catalyst characteristics and catalytic performance, a thorough study of various catalyst samples (HZSM-5, Au/HZSM-5, Zn/HZSM-5, and Au-Zn/HZSM-5) was performed. The interactions between Au and Zn species in Au-Zn/HZSM-5 were determined using ultraviolet-visible and X-ray photoelectron spectroscopies. Compared with Zn/HZSM-5, the introduction of Au to give Au-Zn/HZSM-5 effectively promotes the dehydrogenation and aromatization of n-butane, and also suppresses hydrogenolysis over Zn species. The n-butane conversion (70.8%) and selectivity for olefins and aromatics (61.98%) increased significantly. The dry gas selectivity also decreased significantly to 28.4%. Au-Zn-containing HZSM-5 is a useful catalyst for the conversion of light alkanes.

Key words: Gold, Zinc, HZSM-5 zeolite, n-Butane conversion, Dehydrogenation, Aromatization, Nano-gold particle, Deposition-precipitation

AI SHA種u La Hong, LIU Jiaxu, HE Ning, GUO Hongchen. Catalytic conversion of n-butane over Au-Zn-modified nano-sized HZSM-5[J]. Chinese Journal of Catalysis, 2013, 34(6): 1262-1266.

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URL: https://www.cjcatal.com/EN/10.1016/S1872-2067(12)60539-7

https://www.cjcatal.com/EN/Y2013/V34/I6/1262

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