MANUFACTURING METHOD FOR SYNGAS USING TRI-REFORMING REACTION

摘要

Provided is a method for producing a synthetic gas in which natural gas-carbon dioxide-vapor and oxidizer is simultaneously supplied to tri-reformer, and tri-reforming reaction is effected at high temperature, so as to produce a synthetic gas mainly consisting of hydrogen and carbon monooxide with desired range of composition. The method comprises the steps of (a) introducing a feedstock comprising C1-C4 hydrocarbon and carbon dioxide, and a preheated vapor(3) into methane cracker(100), so as to form a fuel mixture(5) comprising at least 90 vol% of methane gas and the rest of hydrogen, carbon dioxide, carbon monooxide, and unreacted vapor by cracking reaction of C1-C4 hydrocarbon into methane; (b) introducing the fuel mixture into tri-reformer(200), passing the fuel mixture through catalyst layer of the tri-reformer, and simultaneously performing CO2 dry reforming and steam reforming so as to obtain a gas mixture of reaction product(7) comprising hydrogen, carbon monooxide, and unreacted reactants; and (c) cooling the gas mixture, separating and recovering a synthetic gas comprising hydrogen and carbon monooxide by gas-liquid separation. The catalyst comprises 14.03-17.32 wt% of Ni, 1.16-1.43 wt% of Ce, 6.93-8.55 wt% of ZrO2, 16.36-20.20 wt% of MgO, 20.05-24.75 wt% of Cr, and 31.47-38.85 wt% of gamma-Al2O3.