Sulfur tail gas hydrogenation catalyst and preparation method thereof

Abstract

The invention belongs to the technical field of sulfur recovery, and in particular relates to a sulfur tail gas hydrogenation catalyst and a preparation method thereof. The raw materials of the carrier include pseudo-boehmite, modified diatomite and antioxidant additives, and the active components are molybdenum, nickel and iron; the modified diatomite is as follows: diatomite is treated with phosphoric acid, filtered, Roasting after drying to obtain modified diatomite; the specific surface area of ​​diatomite is greater than 50m 2 / g. The invention further increases the oxygen resistance by adding low-temperature catalytic active components and anti-oxidation additives, and has the characteristics of strong anti-oxidation ability, high low-temperature activity, anti-coke and adaptability to high water vapor content, and can be used to induce liquid sulfur removal The gas enters the hydrogenation reactor for treatment, which meets the new national environmental protection standards to be implemented, and has significant economic and social benefits; it can be widely used in various sulfur recovery tail gas treatment devices.

Description

technical field [0001] The invention belongs to the technical field of sulfur recovery, and in particular relates to a sulfur tail gas hydrogenation catalyst and a preparation method thereof. Background technique [0002] In recent years, some large-scale high-sulfur gas fields in my country have been developed one after another, which puts forward new requirements for natural gas purification process. So far, the Puguang Gas Field Natural Gas Purification Plant of Sinopec Zhongyuan Oilfield is the largest gas purification plant in my country. The plant has an annual processing capacity of 12 billion cubic meters of mixed natural gas and an annual sulfur production capacity of 2.4 million tons. It has six sets (12 trains) with a single train scale of 20 The 10,000-ton / year sulfur recovery device adopts the technology package of Black&Veatch Company in the United States, and the supporting catalysts are all imported. Imported catalysts are expensive, and it costs a lot to repl...

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Problems solved by technology

The catalyst has poor oxygen resistance. At the same time, ammonia water is used in the preparation process, which has the problem of ammonia escape and pollutes the environment.

[0005] "CN101108348A" discloses a nickel-based Claus tail gas hydrogenation catalyst and its preparation method. The catalyst consists of three components: main active component, auxiliary active component and alumina. The main active component is nickel oxide. The auxiliary active component is any one of chromium oxide, copper oxide, and iron oxide or a mixture of more than one of them. Although it has the characteristics of good low-temperature catalytic activity, it has poor anti-coking performance.

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