Abstract
The catalytic depolymerization of paraldehyde (2,4,6-trimethyl-1,3,5-trioxan) to acetaldehyde over Na+-, Ca2+- and La3+-exchanged mordenites has been investigated by means of conventional pulse-flow microcatalytic chromatography. The injection port of a gas chromatograph was used as a microcatalytic reactor chamber. The apparent activation energy was found to be 37.0 kJ mol–1 for NaM and 16.0 kJ mol–1 for CaM and LaM. The mordenite-catalysed depolymerization of paraldehyde fits the Langmuir–Hinshelwood kinetic model, which can be described by the following pathway (see Discussion for symbols): (PA)g+Σ [graphic omitted] [PA ⋯Σ]* [graphic omitted] [AA ⋯Σ]* [graphic omitted] (AA)g+Σ
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Schedule a callMore From: Journal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases
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