Formation of radicals and catalytic activity of pentasil-type zeolites in unsaturated hydrocarbon conversions: Part 1. Radical formation upon olefin adsorption

• Published in: Journal of molecular catalysis Vol. 35; no. 1; pp. 97 - 105
• Main Authors: Slinkin, A.A., Kucherov, A.V., Kondratyev, D.A., Bondarenko, T.N., Rubinstein, A.M., Minachev, Kh.M.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 1986
• ISSN: 0304-5102
• DOI: 10.1016/0304-5102(86)85060-X

The formation of radicals upon adsorption of linear (C 3H 6), branched (isobutylene, 2,4,4-trimethylpentene-1) and cyclic (cyclopentene) olefins on pentasil-type zeolites at −78 °C and 20 °C has been studied. It is shown that on pentasil the process of C 3H 6 oligomerization proceeds to a certain extent, even at −78 °C. Similarities in the processes on pentasil and H-mordenite, as well as differences in the structure of radical particles due to channel shape and size, have been found. It is assumed that in the case of branched olefin adsorption on pentasil, a certain portion of the radical particles is formed on the zeolite outer surface. The process of SO 2 − anion radical induced formation as a result of electron transfer from olefin radicals to sorbed SO 2 molecules is observed.