PROCESS FOR THE PREPARATION OF SYNTHESIS GAS

摘要

The invention relates to a process for the preparation of synthesis gas. Process for the preparation of synthesis gas by auto-thermal reforming of carbon dioxide and methane comprising the steps of (a) introducing a methane-comprising feed gas, carbon dioxide and an oxygen-containing gas into a carbon dioxide-methane auto-thermal reforming reactor comprising a bed of reforming catalyst; (b) mixing the methane-comprising feed gas, carbon dioxide and oxygen-containing gas; (c) reacting methane with oxygen in an oxidation reaction; (d) reacting methane with carbon dioxide in a reforming reaction in the presence of the reforming catalyst using the heat released in the oxidation reaction in step (c); and (e) recovering the synthesis gas produced in steps (c) and (d). The process realizes the self-supply of heat in the high temperature reforming reactor by utilizing the heat generated in the exothermic oxidation reaction between methane and oxygen in the endothermic carbon dioxide-methane reforming reaction. The invention, accordingly, not only solves the heating problems of the reforming reactor at high temperatures, but also decreases the energy consumption and operating cost of the system.