Oxidação parcial do metanol : influencia das relações molares agua/metanol e oxigenio/metanol na seletividade

AUTOR(ES)
DATA DE PUBLICAÇÃO

1998

RESUMO

The partial oxidation of methanol to formaldehyde over an iron molybdenum oxide catalyst has been studied in a continuous flow packed bed microreactor. In the present work it was investigated the influence of molar ratios water/methanol and oxygen/methanol over reaction rate and selectivity. The air?s nitrogen is used at conventional process of production of formaldehyde like inert and remover of heat released by reaction; however it can be replaced by water vapor decreasing the emission of VOCs in the atmosphere. The collect of kinetics data was led in the atmospheric pressure and isothermal conditions between 300 and ?340 DEGREES?C, molar ratio oxygen/methanol (Ra) between 0,5 and 0,95, molar ratio water/methanol between 1,3 and 1,9 and residence time (w/?F IND. Ao?) between 8,5 and 34,93 ?g IND. cat.? min/??NL IND. metanol.? A rate model has been proposed for generating the rate expression and as from kinetic data, realize the fit as parameters. The experimental results showed total convertion of methanol, with a pratically total yield in formaldehyde. It is showed that the effect of molar ratios water/methanol over main reaction, in this operation conditions, is very small, and is compensated by an increase of about ?25 DEGREES?C in temperature... Note: The complete abstract is available with the full electronic digital thesis or dissertations

ASSUNTO(S)

formaldeido reatores quimicos controle de poluição - industria metanol catalise heterogenea

ACESSO AO ARTIGO

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