A multifunctional composite sulfur recovery catalyst and its preparation method

Abstract

The invention discloses a multifunctional composite sulfur recovery catalyst and a preparation method thereof. The multifunctional composite sulfur recovery catalyst is composed of the following components: 80-90 parts by weight of a porous carrier with a particle size of 600-1000 μm, 6-15 Graphene, 1.2-1.8 parts by weight of vanadium pentoxide, 0.1-0.3 parts by weight of lanthanum oxide, 0.2-0.3 parts by weight of rhenium oxide, 0.1-0.2 parts by weight of cobalt oxide and 12-15 parts by weight of iron oxide Iron salt; the porous carrier is composed of 20-30 parts by weight of activated alumina, 15-20 parts by weight of titanium dioxide, 30-40 parts by weight of silica and 2-3 parts by weight of zinc oxide. The sulfur recovery catalyst in the present invention not only has better Claus activity and organic sulfur hydrolysis activity, but also has better antioxidant function, and the prepared catalyst has relatively uniform performance.

Description

technical field [0001] The invention relates to the technical field of sulfur recovery, in particular to a multifunctional composite sulfur recovery catalyst and a preparation method thereof. Background technique [0002] Sulfur recovery is usually achieved using a process called "Claus". Sulfur-containing feed gas is commonly referred to as sour gas. The acid gas is first burned with air or oxygen in a device called a furnace. Strictly control the amount of air or oxygen, so that the volume ratio of hydrogen sulfide to sulfur dioxide gas in the combustion products is 2:1. The combustion gas is then cooled and the sulfur in the gas is condensed and recovered. But the existing sulfur recovery catalyst, in the case of ensuring better Claus activity, its organic sulfur hydrolysis activity is difficult to guarantee, and the anti-oxidation function is also poor, when obtaining better Claus activity and organic sulfur hydrolysis activity Under the premise of this, the cost of ...

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Problems solved by technology

But the existing sulfur recovery catalyst, in the case of ensuring better Claus activity, its organic sulfur hydrolysis activity is difficult to guarantee, and the anti-oxidation function is also poor, when obtaining better Claus activity and organic sulfur hydrolysis activity Under the premise that the catalyst cost is high, and it cannot obtain a good anti-oxidation function, and the existing sulfur recovery catalyst has a short effective use time under the condition that the oxygen concentration exceeds 20,000ppm

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