| abstract |
The present invention is characterized in that a sulfur component is not contained and a desulfurization facility is unnecessary as compared with a raw material, transportation efficiency is high compared with the case where methanol is used as a raw material, thermal energy required for evaporation is not required, The present invention also provides a method for producing an appropriate city gas, comprising the steps of evaporating dimethyl ether as a solution and heating the mixture in a heating furnace (33) in the presence of steam to lead to a multitubular reforming reactor (35) Contact. As a result, a gas containing carbon dioxide, carbon monoxide, and hydrogen can be obtained mainly using methane. Subsequently, the reformed gas obtained is led to the pressure swing adsorption device 37 to adsorb and remove carbon dioxide, and is then led to the methanation reactor 38 to methaneize hydrogen, carbon monoxide, and carbon dioxide, thereby producing a raw material gas for city gas, do. Finally, the dimethyl ether of the raw material is added as a heat enhancer to adjust the calorific value to obtain a city gas. |