PROCÉDÉ DE PRODUCTION DE MÉTHANOL À HAUT RENDEMENT CAPABLE DE RÉDUIRE LES ÉMISSIONS DE DIOXYDE DE CARBONE

摘要

The present invention relates to a method for producing high-efficiency methanol capable of reducing emission of carbon dioxide, and more particularly, to a method for producing high-efficiency methanol, including: a first step of preparing mixed gas by using steam and natural gas as reaction raw materials and converting C 2+ hydrocarbon contained in the natural gas into methane on a catalyst; a second step of preparing a synthetic gas including carbon monoxide, carbon dioxide, and hydrogen by reforming the mixed gas in a reformer reactor filled with a reforming catalyst; and a third step of preparing methanol by using the synthesis gas as the reaction raw material and reacting the synthesis gas, wherein an appropriate of carbon dioxide is injected into any one of the reformer reactor of the second step and the methanol synthesis reactor of the third step or divisionally injected into both the reformer reactor of the second step and the methanol synthesis reactor of the third step, the unreacted synthesis gas emitted in the methanol synthesis process of the third step is recalculated to both the second step process and the third step process or only to the third step process again to be reused as the raw material, some unreacted synthesis gas is used as gas for combustion of a heating furnace for supplying reaction heat required in the second step together with the natural gas, and heat of high-temperature post-combustion gas emitted from the heating furnace is efficiently recovered and used by a series of heat exchangers, thereby maximizing carbon efficiency and heat efficiency of the overall process while reducing the use amount of the natural gas.