Ethylene and acetaldehyde production by selective oxidation of ethanol using mesoporous V-MCM-41 catalysts

Date

2006-05-10

Author

Gucbilmez, Yesim
Doğu, Timur
Balci, Suna

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Vanadium-incorporated MCM-41 type catalytic materials, which were synthesized by a direct hydrothermal synthesis procedure, showed very high activity and high selectivity in the production of ethylene from ethanol in an oxidative process. Ethylene selectivity showed a significant increase with an increase in temperature over 300 degrees C, while relatively high acetaldehyde selectivities were observed at lower temperatures. An ethylene yield value of 0.66 obtained at 400 degrees C with an O-2/ethanol feed ratio of 0.5 was beneficial from the point of view that these results might open a new pathway for the production of ethylene from a nonpetroleum environmentally friendly feedstock, namely, bioethanol. The optimum V/Si ratio of the catalyst, which gave the maximum ethylene yield, was found to be around 0.04. Experimental results showing the formation of acetaldehyde and not showing the formation of ethylene in the absence of gas-phase oxygen and the catalyst deactivation observed in such conditions suggested a redox mechanism involving the surface lattice oxygen of the catalyst in acetaldehyde production, while the involvement of adsorbed oxygen was concluded to take place in the formation of ethylene.

Subject Keywords

Supported Vanadia Catalysts, Containing Mcm-41, Oxide Catalysts, Molecular-Sieves, Mixed Oxides, Dehydrogenation, Silica, Surface, Molybdenum, Transformation

URI

https://hdl.handle.net/11511/31481

Journal

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH

DOI

https://doi.org/10.1021/ie050952j

Collections

Graduate School of Natural and Applied Sciences, Article

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Citation Formats

Y. Gucbilmez, T. Doğu, and S. Balci, “Ethylene and acetaldehyde production by selective oxidation of ethanol using mesoporous V-MCM-41 catalysts,” INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, pp. 3496–3502, 2006, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/31481.