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RESEARCH PRODUCT
Photodecomposition of adsorbed ethanoic acid over silica gel catalyst in a flow system
Vincenzo AugugliaroLeonardo PalmisanoMario SchiavelloAntonino Sclafanisubject
Reaction mechanismEthanolSilica gelInorganic chemistryPhotochemistryCatalysisMethaneCatalysischemistry.chemical_compoundAdsorptionchemistryAcetoneMethanolPhysical and Theoretical Chemistrydescription
Abstract The photodecomposition of ethanoic acid adsorbed on silica gels from various sources was studied at wavelengths greater than 300 nm. The experiments were carried out in a flow apparatus. A few photoreactivity tests using acetone or ethanol were also performed. The photodecomposition of ethanoic acid and acetone produced mainly carbon dioxide and methane, in the ratio 2:1, and traces of ethane and methanol. Adsorbed ethanol was not affected at all by the radiation. Infrared and UV-vis reflectance spectra of ethanoic acid adsorbed on silica gels as well as UV-vis reflectance spectra of acetone and ethanol adsorbed on silica gels were recorded. The spectra show the presence of a variety of adsorbed species. It is suggested that the origin of photoreactivity for ethanoic acid is due to a chromophore group of surface esters. A reaction mechanism which accounts for the ratio 2:1 of carbon dioxide to methane is proposed.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1986-05-01 | Journal of Catalysis |