期刊
JOURNAL OF NATURAL GAS CHEMISTRY
卷 20, 期 3, 页码 237-242出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/S1003-9953(10)60184-3
关键词
hierarchical mesoporous ZSM-5; alkali treatment; zinc impregnation; methanol-to-gasoline
资金
- HUST [Z2009008]
- National Natural Science Foundation of China [20973068]
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. N(2) 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 NH(3)-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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