Special catalyst for removing hydrogen sulfide through selective catalytic oxidation and preparation method for special catalyst

Abstract

The invention provides a special catalyst for removing hydrogen sulfide through selective catalytic oxidation and a preparation method for the special catalyst, and belongs to the technical field of catalyst. A catalyst DXY-1 comprises the following components in percentage by mass: 25 percent of titantium oxide, 15 percent of aluminum oxide, 10 percent of iron oxide, 8 percent of boehmite powder, 5 percent of ferric citrate ammonium, 30 percent of silicon oxide, 5 percent of triamine citrate, 1 percent of sodium aluminate and 1 percent of aluminum sulfate; and A catalyst DXY-2 comprises the following components in percentage by mass: 32 percent of titanium oxide, 18 percent of aluminum oxide, 5 percent of palladium oxide, 3 percent of boehmite powder, 10 percent of ferric citrate ammonium, 25 percent of silicon oxide, 1 percent of lemon chrome, 1 percent of triamine citrate, 3 percent of sodium silicate and 2 percent of aluminum sulfate. The invention further provides a preparation method for catalysts DXY-1 and DXY-2. The catalyst provided by the invention is high in selection, gives priority to hydrogen sulfide removal, is wide in adaption, can be suitable for gas desulfuration with smallest hydrogen sulfide content being 3000ppm, and biggest hydrogen sulfide content being 100000ppm, and has relatively high catalytic efficiency.

Description

technical field [0001] The invention belongs to the technical field of catalysts, and in particular relates to a special catalyst for selective catalytic oxidation removal of hydrogen sulfide and a preparation method thereof. Background technique [0002] Sulfur in coal will be converted into inorganic sulfide (H 2 S) or the form of organic sulfides are converted into the gas phase. Sulfur in gas exists in different forms of sulfide, most of which are inorganic sulfide in the form of hydrogen sulfide, and a small amount of organic sulfide (mainly carbonyl sulfide, carbon disulfide, mercaptan, sulfide, etc.) , most organic sulfides can be converted into hydrogen sulfide at higher temperatures in a hydrogen environment. Therefore, under normal circumstances, most of the sulfur in the gas exists in the form of hydrogen sulfide, and the desulfurization of gas is mainly carried out around the removal of hydrogen sulfide. [0003] Coal gas desulfurization can be divided into dr...

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Problems solved by technology

in H 2 When the sulfur content of S>12%, the corrosiveness of the gas is enhanced, the toxicity is high, and it is flammable and explosive. In NHD or low-temperature methanol washing device, H 2 S needs to be repeatedly absorbed, analyzed and concentrated, and finally barely reaches more than 12%, which is barely suitable for the Claus sulfur recovery technology, and the H in the tail gas after Claus sulfur recovery and desulfurization 2 S or SO 2 It is difficult to meet the national emission standards, and the common content is 300-3000ppm, which often needs further treatment. Claus sulfur recovery technology is obviously not an ideal acid gas desulfurization technology

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