Desidratação catalitica do etanol a eter etilico em alumina

AUTOR(ES)

Antonio Jose Gomez Cobo

DATA DE PUBLICAÇÃO

1985

RESUMO

Some thermodynamic aspects about ethanol dehydration reactions to ethylene and diethyl ether, in gas phase, are discussed. From a review of aluminasstructure, based on information about ethanol adsorption forms in this catalyst, and considering the various suggested versions for the mechanisms of ethanol dehydration rections, it is extracted a proposal mechanism , and deducted the respective rate equation for the ethanol dehydration reaction to diethyl ether in alumina catalysts. The validity of the proposed kinetic model was tested with a group of kinetic data, obtained in an integral tubular reactor with alumina catalyst, at the temperature range between 212 and 242ºC. The concentration of ethanol vapour in the reactor feeding was varied by nitrogen dilution, and some laboratory tests were done with hydrated ethanol.. The composition of effluent current of the reactor was determined by gas chromatography technic with TCD (thermal conductivity detector). The kinetic parameters optimization was done by a integral method of analysis, using the conversion experimental values versus space time. The results obtained in the kinetic analysis show not only a good adjustement of the kinetic data by the rate equation used but also a significance in the behaviour of the optimized kinetic parameters

ASSUNTO(S)

alumina alcool

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