Carbonyl sulfide hydrolysis catalyst and preparation method thereof

Abstract

The invention discloses a carbonyl sulfide hydrolysis catalyst. The carbonyl sulfide hydrolysis catalyst comprises the following components in parts by weight: 0.001-10 parts of gold chloride, 0.001-10 parts of silver nitrate, 0.1-25 parts of an alkali metal compound, 0.1-25 parts of an alkaline earth metal compound, 65-99 parts of a catalyst and 0.01-100 parts of deionized water. The invention belongs to the technical field of catalysts for removing organic sulfur, and particularly relates to the carbonyl sulfide hydrolysis catalyst and a preparation method thereof. The purpose is achieved byadopting bifunctional active component. The catalyst is suitable for a wide temperature range from a low temperature (20 DEG C) to a medium temperature (400 DEG C), has no special limitation on the sulfur content in the raw material, can maintain long-term catalytic activity in the range of oxygen content of 5% in the raw material gas, and has relatively good sulfation resistance and sulfur deposition resistance functions.

Description

technical field [0001] The invention belongs to the technical field of catalysts for removing organic sulfur, and specifically refers to a carbonyl sulfide hydrolysis catalyst and a preparation method thereof. Background technique [0002] Carbonyl sulfide (COS) widely exists in synthesis gas with coal, coke, and heavy oil as raw materials, and also in coke oven gas in the coking industry and blast furnace gas in the iron and steel industry. Its existence has caused poison to downstream catalysts in the production process, and affected the performance of downstream catalysts. In addition, when coke oven gas and blast furnace gas are used as combustion gas, it also causes problems of equipment corrosion and environmental pollution. COS hydrolysis is the most practical way to remove organic sulfur, it is through the following reaction under the action of carbonyl sulfide hydrolysis catalyst: COS+hour 2 O → hour 2 S+CO 2 , convert COS into easily removed inorganic sulfides ...

AI Technical Summary

Problems solved by technology

[0003] U.S. Patents USP4444987, USP4455446 and Chinese Patent CN102343271A disclose a catalyst that supports platinum sulfide on activated alumina. The disadvantage of this catalyst is that the cost of the catalyst is high, the COS content in the applicable raw material gas is low, and it needs to be regenerated regularly

[0004] Chinese patent CN108745338A discloses a magnesium-aluminum spinel medium-temperature carbonyl sulfide hydrolysis catalyst, which has the disadvantages of complex catalyst preparation process, high reaction temperature (above 300°C) and high energy consumption; Chinese patent CN106824149B uses polystyrene microspheres as macropores Template agent, using P123 as mesoporous template agent, using soluble titanium salt and soluble silicon as raw materials to synthesize a titania-based COS hydrolysis catalyst with an ordered pore structure with a large specific surface area, which can improve the sulfation resistance of the catalyst

The disadvantage is that the reaction temperature is 200-300 ° C, and there are certain requirements for the sulfur content in the raw material gas

Chinese patent CN100493699C discloses a medium temperature carbonyl sulfide hydrolysis catalyst K 2 O-V 2 o 5 - Aluminum oxide, which has good anti-oxidation properties, but its disadvantage is that the reaction temperature is high (200-400°C)