Acoplamento oxidativo de metano sobre catalisadores Li-Mn/MgO-SiO2

AUTOR(ES)
DATA DE PUBLICAÇÃO

1999

RESUMO

Oxidative coupling of methane is an alternative route for the conversion of methane to hydrocarbons of higher molecular mass and higher boiling points. This reaction has received considerable scientific and industrial attention over the past 20 years. In this work 17 samples of Li-Mn/MgO-Si O IND. 2 were prepared and tested in the oxidative coupling of methane. The solids were prepared changing three different variables in a 2 POT. 3 star factorial design to study the influence of the nominal Mg:Si atom ratio in the supports and of the amount of Li and Mn on the surface of the supports. The mixed oxides of magnesia and silica were prepared by precipitation from aqueous solutions containing MG (N O IND. 3 ) IND. 2 6 H IND. 2 O and amorphous Si O IND. 2 at nomial ratios of Mg:Si equal to 1:0, 1:4, 1:1, 4:1 and 0:1. The active phases, Mn and Li, were added to the supports by the incipient wetmess method. The percentages of Mn and Li added to the mixed oxides varied from 0.2 to 19.8 w/w% and from 0 to 6 w/w%, respectively. The solids were characterized by X-ray diffraction and by BET surface area. The reaction was studied in a quartz reactor at 1100, 1150 and 1200 K, at atmospheric pressure... Note: The complete abstract is available with the full electronic digital thesis or dissertations.

ASSUNTO(S)

metano-oxidação manganes litio catalisadores

ACESSO AO ARTIGO

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