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Combustion catalyst of hydrogen sulfide in gas and its preparation and use method

A catalyst, hydrogen sulfide technology, applied in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc., can solve problems such as unsatisfactory results, and achieve the goal of overcoming sulfuric acid The effect of salinization poisoning, high conversion rate, and total calorie reduction

Inactive Publication Date: 2003-04-16
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These substances can exist in the form of oxides, hydroxides, carbonates and sulfates, but the results of the use of this catalyst are not satisfactory, because with this catalyst, the temperature must be increased by 5% per day

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Weigh crystalline Fe(NO 3 ) 3 9H 2 o 3 Dissolve 3g in 18ml of distilled water, soak 20g of spherical activated silica carrier with an outer diameter of 4~6mm that has been dried at 120°C in it, stir evenly, place it for 12 hours, then dry it at 120°C for 2 hours, and then soak it in NH 2 VO 3 1.0g, crystal C 2 h 2 o 4 2H 2 o 4 In a solution consisting of 1.4 g and 16 ml of distilled water, heat the prepared solution at 30°C and stir evenly for 30 minutes, then place it for 12 hours, then dry it at 120°C for 2 hours, and then bake it at 500°C for 4 hours in an air atmosphere to obtain the catalyst sample a. The specific surface area of ​​the sample is 285m 2 / g, the average crushing strength is 110N / piece.

Embodiment 2

[0026] Weigh NH 4 VO 3 11g, crystal C 2 h 2 o 4 2H 2 O 14g, crystalline Fe(NO 3 ) 3 9H 2 O 33g was dissolved in 180ml of distilled water, then slowly added 4ml of pure nitric acid to the resulting solution, and stirred for 30 minutes. Immerse 200g of spherical activated silica carrier with an outer diameter of 4~6mm that has been dried at 120°C, place it for 12 hours, then dry it at 120°C for 2 hours, and bake it at 500°C for 4 hours to obtain catalyst sample D . The specific surface area of ​​the sample is 27m 2 / g, the average crushing strength is 104N / piece.

Embodiment 3

[0036] Fill 5ml of the catalyst sample crushed to 20-40 mesh into a stainless steel tubular reactor with an inner diameter of 5mm, and fill the upper part of the catalyst with 5ml of quartz sand of the same particle size (40-60 mesh) for mixing and preheating. Using Shimadzu GC-14B gas chromatograph on-line to analyze H in the inlet and outlet gas of the reactor 2 S, SO 2 The content of sulfide was analyzed using CDX-301 carrier, the column temperature was 80°C, and 5A molecular sieve was used to analyze O 2 content, the column temperature is 40°C, a thermal conductivity detector is used, the detector temperature is 100°C, hydrogen is used as the carrier gas, and the post-column flow rate is 28ml / min.

[0037] by For the index reaction, investigate the activity of the catalyst sample, the inlet gas composition (dry basis): H 2 S 1% ψB , O 2 4% ψB , H 2 O 30% ψB (ψB represents volume percentage), the rest is N 2 , the gas volumetric space velocity is 500h -1 , t...

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Abstract

A combustion catalyst for the hydrogen sulfide in gas is composed of silicon oxide as carrier (75-96 wt.%), vanadium oxide (0.5-15) and iron oxide (0.2-10). Its advantages are high selectivity to hydrogen sulfide, high conversion rate of SO2 and catalytic activity, low operation temp. (250-350 deg.C), and high specific surface area and strength.

Description

technical field [0001] The invention relates to an incineration catalyst for hydrogen sulfide in gas and its preparation and use method, and is especially suitable for treating the tail gas of the sulfur recovery Claus process and the waste gas of a geothermal power plant. Background technique [0002] With the development of global industry, environmental protection work is also strengthened and deepened synchronously. 2 S exhaust gas emission standards are becoming increasingly stringent. Certain industrial exhaust gases, especially those from oil refineries, sewage treatment plants, geothermal power plants, pharmaceutical and chemical plants, contain sulfur and polluting oxidizable sulfides. The sulfides present in exhaust gas mainly include hydrogen sulfide and organic sulfur compounds. These gases need to be oxidized and converted into sulfur dioxide before they can be discharged into the atmosphere. However, the treatment of low-concentratio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/52B01D53/86B01J23/847
Inventor 殷树青唐昭峥高淑美达建文周晓双张玉红胡文宾
Owner CHINA PETROLEUM & CHEM CORP
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