| 摘要 |
<p>A process for producing a town gas which comprises evaporating dimethyl ether, heating it in the presence of steam in a heating furnace (33), and introducing it into a multi-tubular reforming reactor (35) to contact it with a reformation catalyst, thereby producing a gas containing methane as a main component, carbon dioxide, carbon monoxide and hydrogen; then introducing the resultant reformed gas into an adsorption unit (37) of pressure-swing type to remove carbon dioxide by adsorption, and introducing it to a methanation reactor (38) to methanate the carbon monoxide and carbon dioxide, thereby producing a raw material gas for a town gas; and finally adding dimethyl ether to it, which is the raw material used in this process, as a calorific value-enhancing agent, thereby adjusting the calorific value of the resultant town gas. The process requires no desulfurization units due to its use of a raw material containing no sulfur, exhibits high transportation efficiency compared to a process using methanol as a raw material, and does not require excess energy upon evaporation, and hence is also suitable for the commercialization of small-to-medium scale.</p> |
