Oxidation of ethylene to acetaldehyde by N2O on Na-modified FeZSM-5 zeolite
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The oxidation of ethylene to acetaldehyde by N2O on Na-modified FeZSM-5 zeolite in a flow mode was studied at a temperature of 300 to 375 °C and with varying the feed mixture ratio N2O:ethylene:He from 5:5:90 to 5:95:0. It was found that in this range of conditions, acetaldehyde could be produced with selectivity up to 55%. Other reaction products were COx, coke and some amount of unidentified products, which were mostly the result of non-oxidative transformations of ethylene. To study the mechanism of the reaction, we used a quasi-catalytic mode in the temperature range 150–200 °C. The products accumulated on the surface during the reaction in the quasi-catalytic mode could be extracted from the surface and identified using various analytical methods. This approach allowed us to determine that the primary product of ethylene oxidation is ethylene oxide, which then isomerizes into acetaldehyde.
KeywordsN2O Ethylene Acetaldehyde Reaction mechanism Quasi-catalytic mode FeZSM-5
We thank Prof. G.I. Panov for fruitful discussions, N.P. Skorupina for catalyst synthesis, Dr. M.V. Shashkov for GC–MS analysis, and Dr. I.E. Soshnikov for NMR analysis. This work was supported by Ministry of Science and Higher Education of the Russian Federation (Project АААА-А17-117041710083-5).
- 8.Eckert M, Fleischmann G, Jira R, Bolt H (2007) Acetaldehyde. In: Ullmann’s encyclopedia of industrial chemistry. Wiley, New YorkGoogle Scholar
- 14.Barthos R, Drotár E, Szegedi Á, Valyon J (2012) Wacker oxidation of ethylene over vanadia nanotube supported Pd catalysts. Mater Res Bull 47:4452–4456. https://doi.org/10.1016/j.materresbull.2012.09.052 CrossRefGoogle Scholar
- 18.Elleuch B, Naccache C, Ben Taarit Y (1984) The dual CuII–PdII–Y zeolite analogue for the Wacker catalyst in the oxidation of olefins. In: Catalysis on the energy scene: proceedings of the 9th Canadian Symposium on Catalysis, Québec, P.Q., September 30–October 3, 1984. Elsevier, Amsterdam, pp 139–145Google Scholar
- 24.Frusteri F, Iannibello A, Parmaliana A, et al (1990) Ethylene oxidation over hydrophobic thin layer catalysts. In: New developments in selective oxidation. Elsevier Science Publishers B.V, Amsterdam, pp 733–738Google Scholar
- 42.Hölderich WF, Barsnick U (2001) Rearrangement of epoxides. In: Sheldon RA, van Bekkum H (eds) Fine chemicals through heterogeneous catalysis. Wiley, New York, p 217Google Scholar
- 45.Marc J (2007) Advanced organic chemistry: reaction, mechanism and structure, 6th edn. Wiley, New YorkGoogle Scholar