Selective oxidation of methanol to dimethoxymethane over acid-modified V2O5/TiO2 catalysts

Autor:	Mei Dong, Xinlong Lu, Jianguo Wang, Guofu Wang, Yubao Zhao, Huaqing Zhu, Weibin Fan, Zhangfeng Qin
Rok vydání:	2011
Předmět:	Chemistry General Chemical Engineering Organic Chemistry Inorganic chemistry Energy Engineering and Power Technology Vanadium chemistry.chemical_element Redox Vanadium oxide Catalysis chemistry.chemical_compound Fuel Technology Yield (chemistry) Dimethoxymethane Methanol Selectivity
Zdroj:	Fuel. 90:1335-1339
ISSN:	0016-2361
DOI:	10.1016/j.fuel.2011.01.007
Popis:	Selective oxidation of methanol to dimethoxymethane (DMM) was conducted in a fixed-bed reactor over an acid-modified V2O5/TiO2 catalyst. The influence of the acid modification on its structure, redox and acidic properties, and catalytic performance for methanol oxidation were investigated. The results indicated that the content of vanadia in the catalyst exhibits a vital influence on the dispersion of vanadium species, while the acid modification can enhance its surface acidity. Proper amounts of the acid (W( SO 4 2 - ) = 15%) and V2O5 (W(V2O5) = 15%) components loaded in the acid-modified V2O5/TiO2 catalyst are able to build a bi-functional circumstance that is favorable for the formation of DMM with high activity and selectivity. As a result, for the selective oxidation of methanol, the H2SO4-modified V2O5/TiO2 catalyst gives a much higher DMM yield at 150 °C than the unmodified one.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::f80dd64e7564326a91525533b35f0628 https://doi.org/10.1016/j.fuel.2011.01.007 Zobrazit plný text záznamu Full Text from ScienceDirect