PROCESS FOR THE PREPARATION OF BENZENE FROM METHANE AND CARBON DIOXIDE WITH A FLUID-TIGHT DIVIDING WALL IN THE REACTOR

摘要

The present invention relates to a novel process for preparing benzene in a reactor, comprising the steps of: a) catalytic aromatization of methane to benzene and hydrogen; b) catalytic reaction of carbon dioxide with hydrogen obtained from step a) to give methane and water; and c) combustion of hydrogen with oxygen to give water and/or methane with oxygen to give carbon dioxide and water; wherein the catalytic aromatization of methane to give benzene and hydrogen is executed in a reactor having at least one reaction zone for execution of the aromatization and at least one combustion zone for execution of the combustion of at least hydrogen and/or methane in step b); wherein i) the hydrogen obtained in the aromatization of a) and/or the methane unreacted in the aromatization in step a) is combusted in the combustion zone, optionally with methane from step c); and ii) any carbon dioxide formed in the combustion of b) is converted together with a portion of the hydrogen obtained from the aromatization in step a) to methane in step c); and iii) the methane thus formed from step c) is used at least partly for the aromatization in step a); and wherein the combustion zone and the reaction zone for the aromatization in the reactor in step a) are separated by means of a wall impervious to fluids.