SHI Meiqin, ZHENG Huixin, WEI Aiping, et al. Effect of zinc additive on n-hexane aromatization over WC/HZSM-5 catalysts[J]. CIESC Journal, 2015, (2): 553-560.
SHI Meiqin, ZHENG Huixin, WEI Aiping, et al. Effect of zinc additive on n-hexane aromatization over WC/HZSM-5 catalysts[J]. CIESC Journal, 2015, (2): 553-560.DOI: 10.11949/j.issn.0438-1157.20141298.
A series of Zn-WC/HZSM-5 catalysts with different amounts of Zn additive were prepared based on the precursor WC/HZSM-5. The samples were characterized with X-ray diffraction
scanning electron microscopy
N2 adsorption-desorption
Fourier transform infrared spectroscopy and thermogravimetric analyzer. Aromatization of n-hexane was evaluated over the Zn-WC/HZSM-5 catalysts in a fixed-bed micro reactor. The role of metal components and the reaction mechanism were studied. Both aromatic selectivity and yield increased with Zn-WC/HZSM-5. Yield increased to 36.18% when the Zn-WC/HZSM-5 displayed the best activity with the concentration of Zn 1.5% (mass). Introduction of Zn into WC/HZSM-5 led to redistribution of acid sites on the surface of catalyst and also caused decrease of coke deposition.