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Inhibition of Formation and Removal of Adsorbed Species, in the Isobutene Methacrolein Sno2-sb2o4 System

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Li, C. Delmon, Bernard [UCL] Xin, Q. Ruiz, Patricio [UCL] Guo, XX.

FT-IR measurements show that methacrolein adsorbs on SnO2, and transforms to strongly held precursors of complete oxidation products at 300-400-degrees-C. In SnO2-Sb2O4 mechanical mixtures in the presence of oxygen however, where the remote control has been shown to operate, no such effect is observed. An identical effect is observed when the adsorbed species produced by the contact of isobutene and oxygen with the catalysts are studied. This suggests that the remote control modifies SnO2 surface sites in such a way that the adsorption strength of intermediate oxidation products of methacrolein is depressed. This could be the reason for the increased selectivity in isobutene oxidation observed when Sb2O4 is mixed with SnO2.

Document type Article de périodique (Journal article) – Article de recherche
Access type Accès restreint
Publication date 1992
Language Anglais
Journal information "Journal of Molecular Catalysis" - Vol. 72, no. 3, p. 307-313 (1992)
Peer reviewed yes
Publisher Elsevier Science Bv (Amsterdam)
issn 0304-5102
Publication status Publié
Affiliation UCL
Links
Bibliographic reference Li, C. ; Delmon, Bernard ; Xin, Q. ; Ruiz, Patricio ; Guo, XX.. Inhibition of Formation and Removal of Adsorbed Species, in the Isobutene Methacrolein Sno2-sb2o4 System. In: Journal of Molecular Catalysis, Vol. 72, no. 3, p. 307-313 (1992)
Permanent URL http://hdl.handle.net/2078.1/50380