| 摘要 |
<p>PURPOSE:To stably and readily obtain a highly desulfurized town gas with a small amount of a desulfurizing agent for a long period by desulfurizing the town gas without containing hydrogen gas with the specific desulfurizing agent while adding the hydroger to the town gas. CONSTITUTION:Hydrogen in an amount of preferably 1-5% is added to a town gas without containing the hydrogen gas and the town gas is simultaneously desulfurized with a copper-zinc-based desulfurizing agent prepared by a coprecipitation method to desulfurize the town gas. A Cu-Zn-based desulfurizing agent, etc., obtained by mixing an aqueous solution containing a cooper compound and a zinc compound with an aqueous solution of an alkaline substance, forming a precipitate, then washing the precipitate with water, filtering and drying the resultant precipitate, burning the dried precipitate at 270-400 deg.C and further reducing the burned substance with hydrogen is preferred as the desulfurizing agent. The desulfurization is usually carried out by passing the town gas and hydrogen through a desulfurizing tube filled with the desulfurizing agent. Furthermore, the town gas is preferably preheated with a heater, etc., and desulfurized at 250-300 deg.C.</p> |
