Multifunctional raw gas purifying agent, preparation method and application method thereof

Abstract

The invention relates to a multifunctional raw gas purifying agent, a preparation method and an application method thereof. According to the present invention, active alumina is adopted as a carrier, and the carrier loads ammonium molybdate, one or two materials selected from copper acetate, zinc acetate, lead acetate, nickel oxalate and ammonium metavanadate, and one material selected from magnesium chloride, potassium carbonate and sodium carbonate to prepare the multifunctional raw gas purifying agent, wherein the mass of the loaded ammonium molybdate is 1-10% of the mass of the carrier, the total mass of the other two or three loaded metal compounds is 10-25% of the mass of the carrier. The preparation method for the multifunctional raw gas purifying agent comprises: impregnating the carrier for 2-6 hours by the metal compound solution; drying for 2-4 hours at a temperature of 120 DEG C; carrying out baking for 4-6 hours at the temperature of 280-350 DEG C to prepare the multifunctional raw gas purifying agent. The multifunctional raw gas purifying agent of the present invention is adopted in the raw gases of water gas, semi-water gas, coke oven gas or IGCC power generation fuel gas to purify COS, CS2, HCN, SO2, SO3 O2 and other impurities, wherein the conversion rates of the COS, the CS2, the HCN, the SO2 and the SO3 are more than or equal to 90%, and the O2 removal rate is more than or equal to 95%.

Description

Technical field: [0001] The invention relates to a multifunctional raw material gas purifier and its preparation and application method in raw material gases such as water gas, semi-water gas, coke oven gas and IGCC power generation gas. Background technique: [0002] In water gas, semi-water gas, coke oven gas, IGCC power generation gas and other raw materials, there is often a certain amount of H 2 S, COS, CS 2 , HCN, SO 2 and SO 3 , also contains ≤1% O 2 , these impurities will poison the downstream catalyst or corrode the downstream equipment, where H 2 S removal technology is relatively mature, and COS and CS have been studied in previous patents or industrial applications 2 hydrolysis, which is hydrolyzed to H 2 S, then remove (patent CN01106660.1), or use different catalysts or methods to remove COS and CS respectively 2 and HCN (patents CN02131302.4, CN02131303.2, CN02131304.0, CN02155489.7, CN031242596), or only study deoxidation or sulfur-resistant deoxidize...

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Problems solved by technology

[0002] In water gas, semi-water gas, coke oven gas, IGCC power generation gas and other raw materials, there is often a certain amount of H 2 S, COS, CS 2 , HCN, SO 2 and SO 3 , also contains ≤1% O 2 , these impurities will poison the downstream catalyst or corrode the downstream equipment, where H 2 S removal technology is relatively mature, and COS and CS have been studied in previous patents or industrial applications 2 hydrolysis, which is hydrolyzed to H 2 S, then remove (patent CN01106660.1), or use different catalysts or methods to remove COS and CS respectively 2 and HCN (patents CN02131302.4, CN02131303.2, CN02131304.0, CN02155489.7, CN031242596), or only study deoxidation or sulfur-resistant deoxidizers under sulfur-free conditions (patents ZL02135207.0, ZL93112631.2, CN200610019605.0 ), for the above-mentioned SO 2 and SO 3 There are few studies on the conversion and removal of the above-mentioned six impurities, and there are no patents and industrial application reports on the simultaneous conversion and removal of the above six impurities using a catalyst

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