Decomposição do metanol em catalisadores cobre-zinco

AUTOR(ES)
DATA DE PUBLICAÇÃO

1991

RESUMO

In the present work a qualitative study was done, concerning the methanol decomposition reaction using copper-zinc based catalysts, under different conditions of temperature and molar feed ratio, aiming to bring some contribution towards a better understanding of the mechanism of the methanol synthesis reaction. Methanol was vaporized in bubblers and carried to the reactor by an inert gas, and its concentration was varied through a change in the temperature of the thermostatic water bath which contained the bubblers. The composition of the reactor?s effluent stream was determined by gas chromatography. The data obtain in a tubular integral fixed-bed reactor, in the 215- 305 DEGREES C temperature range, show that, between 215 and 260 DEGREES C methanol decomposes giving essentially H IND. 2 and C H IND. 3 O O C H , and between 260 DEGREES C and 305 DEGREES C, H IND. 2 , CO, C H IND. 2 O and C H IND. 3 O O C H , are formed. Technical support to the catalyst preparation stage, was given through several physical and chemical characterization tests, which included B.E.T., X.R.D., X.P.S., T.P.S. and I.R. An analysis of the results shows that it is possible to conciliate the fact of obtaining several products in the methanol decomposition with the fact that both reactions, synthesis and decomposition occur through a mechanism formed by the same intermediate products, just as it is imposed by the Microscopic Reversibility Principle

ASSUNTO(S)

processos quimicos metanol - biodegradação

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