Preparation of hierarchical mesoporous Zn/HZSM-5 catalyst and its application in MTG reaction |
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| Authors: | Youming Ni Aiming Sun Xiaoling Wu Guoliang Hai Jianglin Hu Tao Li Guangxing Li |
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| Affiliation: | Youming Ni1,Aiming Sun1,Xiaoling Wu1,Guoliang Hai1,Jianglin Hu1,Tao Li1,2,Guangxing Li1,2 1. School of Chemistry & Chemical Engineering,Huazhong University of Science & Technology,Wuhan 430074,Hubei,China,2. Hubei Key Laboratory of Materials Chemistry & Service Failure |
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| Abstract: | The hierarchical mesoporous Zn/ZSM-5 zeolite catalyst was prepared by NaOH treatment and Zn impregnation, and its application in the conversion of methanol to gasoline (MTG) was studied. N2 adsorption-desorption results showed that the mesopores with sizes of 2–20 nm in HZ5/0.3AT was formed by 0.3 M NaOH alkali treatment. The zeolite samples after modification were also characterized by XRF, AAS, XRD, SEM and NH3-TPD methods. Zn impregnated catalyst Zn/HZ5/0.3AT exhibited dramatic improvements in catalytic lifetime and liquid hydrocarbons yield. The selectivity of aromatic hydrocarbons was also improved after Zn impregnation. It is suggested that the mesopores of Zn/HZ5/0.3AT enhanced the synergetic effect of Zn species and acid sites and the capability to coke tolerance, which were confirmed by the results of catalytic test and TGA analysis, respectively. |
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| Keywords: | hierarchical mesoporous ZSM-5 alkali treatment zinc impregnation methanol-to-gasoline |
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