A chemiluminescence study of the decomposition of methyl linoleate hydroperoxides on active substrates
1987; Elsevier BV; Volume: 43; Issue: 4 Linguagem: Inglês
10.1016/0009-3084(87)90023-5
ISSN1873-2941
AutoresGregory Cash, Graeme A. George, John P. Bartley,
Tópico(s)Odor and Emission Control Technologies
ResumoChemiluminescence (CL) from the decomposition of the hydroperoxides of methyl linoleate (ML) was studied between 70°C and 106°C in an inert atmosphere in the bulk, on neutral, acidic, and basic alumina, and on silica gel. The decomposition of the hydroperoxides in the bulk followed first order kinetics and showed the slowest decomposition rates. The largest signals and the fastest decays occurred on neutral alumina. The rate data indicated bimolecular decomposition of the hydroperoxides adsorbed on adjacent active sites. From sorption data it appeared that the majority of the hydroperoxides were bound by the ester group perpendicular to the surface while the remainder were believed to lie flat, being attached by the hydroperoxide group. The hydroperoxide is susceptible to acid catalysed decomposition on an acidic alumina substrate and this may account for the lower emission intensity observed on this substrate.
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