Preparation method and application of efficient catalyst used for organic sulfur hydrogenation conversion

Abstract

A preparation method of an efficient catalyst used for organic sulfur hydrogenation conversion comprises: reacting a mixed solution of TiCl4 and AlCl3 with an ammonia-water solution in a microwave-heated reactor, performing ageing and spray drying, and performing microwave calcination to obtain catalyst carrier powder; mixing a mixed solution of ammonium paramolybdate and soluble first active auxiliary agent salt with the carrier powder, performing impregnating in supersonic wave and performing drying, and calcinating the obtained product in a microwave calcinator to obtain a semi-finished catalyst powder; mixing a mixed solution of ammonium paramolybdate, the soluble first active auxiliary agent salt, and soluble second active auxiliary agent salt with the semi-finished catalyst powder, performing impregnating in supersonic wave, and calcinating the obtained product to obtain finished catalyst powder; and uniformly mixing the finished catalyst powder, a binder, a pore forming agent and water, and performing extrusion moulding, drying and calcination to obtain the finished catalyst used for organic sulfur hydrogenation. The catalyst is high in conversion rate and long in life.

Description

technical field [0001] The invention belongs to organic sulfur hydrogenation conversion catalysts, in particular to a preparation method and application of an efficient organic sulfur hydrogenation conversion catalyst used in synthesis gas, natural gas, coke oven gas and refinery dry gas raw material gas. technical background [0002] Gases such as coal-based synthesis gas, coke oven gas, natural gas and smelting dry gas contain a large amount of organic sulfides. When used in industrial production, organic sulfides may lead to the deactivation of subsequent synthesis catalysts, resulting in a decline in industrial yield. Therefore, in the conversion and utilization or discharge process of the above-mentioned gases, the organic sulfur in the gas must be converted and removed to meet the environmental protection requirements of the subsequent synthesis or discharge. The sulfur in the feed gas is usually more than 90% H 2 S, the content of organic sulfur is generally less th...

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Problems solved by technology

[0004] Patent CN101797508A discloses a coke oven gas hydrodesulfurization catalyst and its preparation method. The catalyst uses γ-Al 2 o 3 As a carrier, the active component is loaded on the catalyst carrier by impregnation method. The catalyst has a certain inhibitory effect on the methanation reaction and the disproportionation reaction of CO, and shows good anti-coking performance, but its organic sulfur The hydrogenation activity is low, and the conversion rate of organic sulfur is only about 80% at 300 °C, and the catalyst has high requirements for the reaction temperature and hydrogen partial pressure of the hydrogenation conversion of thiophene

Patent CN102489336A discloses a catalyst carrier for organic sulfur hydrogenation and its preparation method. After the carrier of the catalyst is modified by immersion in alkaline solution and acid solution, the content of impurities in the pores of the carrier is reduced, which is beneficial to the loading of active components. The loading capacity of the active components of the carrier is increased, thereby improving the catalytic efficiency of hydrogenation of organic sulfur, but the use temperature of the catalyst is about 350°C, and the hydrogenation conversion rate of thiophene is 70% under the condition of 350°C. % or less, resulting in low overall organic sulfur hydrogenation conversion efficiency

[0005] The above patents disclose a variety of catalysts for the hydrogenation conversion of organic sulfur. Although they have high conversion efficiency for some organic sulfur such as COS under high temperature conditions, their catalytic efficiency for hydrogenation of organic sulfur such as thiophene is relatively poor. The above catalysts also have the disadvantages of low catalytic efficiency at low temperature and easy carbon deposition at high temperature