Journal ArticleDOI
Selective conversion of methanol into aromatic hydrocarbons over zinc-exchanged ZSM-5 zeolites
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In this paper, the conversion of methanol into hydrocarbons over ZSM-5 zeolites has been studied with a special emphasis on improving the selectivity to aromatic molecules.Abstract:
The conversion of methanol into hydrocarbons over ZSM-5 zeolites has been studied with a special emphasis on improving the selectivity to aromatic hydrocarbons. The introduction of zinc or gallium cations to ZSM-5 appreciably increased the yield of or selectivity for aromatic hydrocarbons. Thus, under the reaction conditions of 700 K, methanol pressure of 40 kPa and W/F= 9.0 g h mol–1, the yields of aromatic hydrocarbons over H-ZSM-5, Ga-ZSM-5, and Zn-ZSM-5 were 40.3, 48.2 and 67.4%, respectively. Over Zn-ZSM-5 the distribution of aromatic products on a molar basis was as follows; benzene (5.8%), toluene (28.0%), xylenes + ethylbenzene (45.6%) and C9+(20.6%). The reaction conditions were optimized to obtain the highest yield of aromatic hydrocarbons over Zn-ZSM-5. The yield of aromatics increased with temperature up to 700 K, but a further temperature increase led to the decomposition of methanol to carbon oxides. The selectivity for aromatics gave a maximum of 70% at a methanol partial pressure of 22 kPa. The yield of aromatic hydrocarbons increased with the degree of cation-exchange of H-ZSM-5 with Zn-cations, indicating the essential role of zinc species in the enhancement of the selectivity to aromatics. It is concluded that the zinc species has a capability of efficiently converting alkene intermediates to aromatic hydrocarbons.read more
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Journal ArticleDOI
Transformation of Lower Alkanes into Aromatic Hydrocarbons over ZSM-5 Zeolites
TL;DR: In early work, Csicsery as mentioned in this paper described dehydrocyclodimerization of lower alkanes over bifunctional catalysts such as platinum on alumina and Cr2O3 on alboranium.
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Influence of preparation method on the performance of Zn-containing HZSM-5 catalysts in methanol-to-aromatics
TL;DR: In this paper, the influence of preparation method on the catalytic performance of Zn/ZSM-5 in the process of methanol-to-aromatics (MTA) was investigated.
Journal ArticleDOI
The preparation of nano-sized H[Zn, Al]ZSM-5 zeolite and its application in the aromatization of methanol
TL;DR: In this article, the preparation of nano-sized H[Zn, Al]ZSM-5 zeolite by direct synthesis procedure and its application in the aromatization of methanol were studied.
Journal ArticleDOI
Modified zeolite ZSM-5 for the methanol to aromatics reaction
Marco Conte,Jose Antonio Lopez-Sanchez,Qian He,David J. Morgan,Yulia Ryabenkova,Jonathan K. Bartley,Albert Frederick Carley,Stuart Hamilton Taylor,Christopher J. Kiely,Karim Khalid,Graham J. Hutchings +10 more
TL;DR: In this article, the performance of catalysts comprising zeolite ZSM-5 impregnated with precious metals including Ag, Cu, Ni, Pd, Ir and Ru, have been tested for the methanol to hydrocarbons reaction in a continuous flow fixed bed reactor.
Journal ArticleDOI
Gas Conversion to Liquid Fuels and Chemicals: The Methanol Route‐Catalysis and Processes Development
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