Enhanced Stability of Mo-Promoted Zn/HZSM-5 Catalyst for Methanol to Aromatics
- Autores: Tian H.1,2,3, Zhang Z.1,2,3, Ma X.1,2,3
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Afiliações:
- College of Chemical Engineering
- Chemical Engineering Research Center of the Ministry of Education for Advanced Use Technology of Shanbei Energy
- Research Center of Engineering Technology for Clean Coal Conversion
- Edição: Volume 59, Nº 5 (2018)
- Páginas: 618-627
- Seção: Article
- URL: https://journal-vniispk.ru/0023-1584/article/view/164038
- DOI: https://doi.org/10.1134/S0023158418050178
- ID: 164038
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Resumo
A Mo-promoted Zn/HZSM-5 catalyst was prepared by isometric impregnation method (IM). The physicochemical properties of catalysts were characterized by X-ray diffraction, registration of N2 adsorption-desorption isotherms, transmission electron microscopy, NH3 temperature-programmed desorption and IR spectroscopic study of pyridine adsorption. The results show that by doping zeolite with Mo species it is possible to tune the microstructures, acidity and crystallinity of the catalyst. Additionally, it was found that the 1%Mo(IM)–5%Zn(IE)/HZSM-5 catalyst had a high catalytic activity and stability for methanol to aromatics (MTA) reaction. The yield of aromatics reached 77.3% at 450°C and TOS = 3 h. When the TOS = 98 h, the yield of total aromatics remains at a 60.4% level. The lifetime of catalysts was influenced by the synergetic effect of Brønsted and Lewis acid sites, so the modification with Mo may bring an opportunity to prolong the lifetime of Zn/HZSM-5 catalyst in the MTA reaction. The metal components are sintered and lost in continuous reaction-regeneration cycles. Accordingly, the activity of deactivated catalyst cannot be completely restored to the initial level.
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Sobre autores
H. Tian
College of Chemical Engineering; Chemical Engineering Research Center of the Ministry of Education for Advanced Use Technology of Shanbei Energy; Research Center of Engineering Technology for Clean Coal Conversion
Email: maxymy@nwu.edu.cn
República Popular da China, Xi’an, Shaanxi, 710069; Xi’an, Shaanxi, 710069; Xi’an, Shanxi, 710069
Zh. Zhang
College of Chemical Engineering; Chemical Engineering Research Center of the Ministry of Education for Advanced Use Technology of Shanbei Energy; Research Center of Engineering Technology for Clean Coal Conversion
Email: maxymy@nwu.edu.cn
República Popular da China, Xi’an, Shaanxi, 710069; Xi’an, Shaanxi, 710069; Xi’an, Shanxi, 710069
X. Ma
College of Chemical Engineering; Chemical Engineering Research Center of the Ministry of Education for Advanced Use Technology of Shanbei Energy; Research Center of Engineering Technology for Clean Coal Conversion
Autor responsável pela correspondência
Email: maxymy@nwu.edu.cn
República Popular da China, Xi’an, Shaanxi, 710069; Xi’an, Shaanxi, 710069; Xi’an, Shanxi, 710069
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