Honeycomb catalyst for catalytic incineration of gas containing sulfur and preparation method thereof

A honeycomb catalyst and catalytic incineration technology, applied in the direction of physical/chemical process catalysts, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problem of large air resistance in the catalytic incineration reactor bed Solve the problems of poor sulfur resistance and low operating space speed, and achieve the effect of low cost, high operating space speed and excellent performance

Active Publication Date: 2011-05-04
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The above-mentioned existing sulfur-containing compound exhaust gas catalytic incineration catalysts generally have one or more of the disadvantages of complex components, poor sulfur resistance, high cost, and the need

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0019] Example 1

[0020] Measure 50 mL of tetrabutyl titanate into a 500 mL beaker, add 50 mL of absolute ethanol under electromagnetic stirring, and stir evenly at room temperature to prepare solution A. Prepare 100 mL of solution B with a volume ratio of 25%, 5%, 10% and 60% of glacial acetic acid, hydrochloric acid, distilled water and absolute ethanol, respectively. Solution A was added dropwise to solution B under electromagnetic stirring, and a light yellow sol was prepared after fully stirring. The honeycomb ceramic carrier was boiled in a 5% nitric acid solution for 30 min, taken out, washed with distilled water for 5 times, and dried. After immersing the treated honeycomb ceramic in the sol for 2 minutes, slowly take it out, dry it at 105 °C, then bake it in a muffle furnace at 500 °C for 2 hours, naturally cool it to room temperature, and repeat the above steps 6 times to obtain the desired titanium dioxide coating. thickness of the carrier.

[0021] Weigh 75.6g ...

Example Embodiment

[0026] Example 2

[0027] 460g of titanium dioxide powder, 8g of methylcellulose powder and 41.7g of lanthanum nitrate (La(NO) 3 ) 3 ·6H 2 O) Mix and grind in a ball mill for 45min, add bismuth nitrate solution (46.4g of Bi(NO) 3 ) 3 ·5H 2 (O dissolved in 70mL of 10% dilute nitric acid), continue to grind for 15min, and add distilled water to make the ground material evenly mixed into a paste with appropriate hardness, put this paste into a honeycomb mold and extrude it, dry at 60°C for 5h and Dry at 105℃ for 6h, calcinate at 250℃ for 8h and calcinate at 500℃ for 10h. The specific surface area of ​​the obtained catalyst is 1170m 2 / m 3 , the hole spacing is 3.0mm, and the wall thickness is 0.5mm. The composition of the catalyst is La 2 O 3 3.2% (La 2.7%), Bi 2 O 3 4.5% (Bi 4.0%), TiO 2 92.8%, the La / Bi molar ratio is about 1:1.

Example Embodiment

[0028] Example 3

[0029] Mix and grind 450g of titanium dioxide powder, 44g of bismuth oxide powder, 15g of copper oxide powder, 6g of polyacrylamide and 2g of activated carbon powder in a ball mill for 45min, while grinding, slowly add ethanolamine solution (the volume ratio of ethanolamine and distilled water is 1:5) to make a paste with appropriate hardness, put the paste into a honeycomb mold and extrude it, dry at 70°C for 7h and 110°C for 4h, bake at 270°C for 8h and 480°C for 10h. The specific surface area of ​​the obtained catalyst is 920m 2 / m 3 , the hole spacing is 3.0mm, and the wall thickness is 0.5mm. The composition of the catalyst is CuO 2.9%, Bi 2 O 3 8.6%, TiO 2 88.5%, and the Cu / Bi molar ratio is about 1:1.

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Abstract

The invention provides a honeycomb catalyst for catalytic incineration of gas containing sulfur and a preparation method thereof. The honeycomb catalyst for catalytic incineration of gas containing sulfur is honeycomb-shaped; active ingredientd comprise a first active component, a second active component and titanium dioxide. The first active component is oxide of bismuth, and calculated by catalyst according to weight, the content of the bismuth is 1.0%-10%. The second active component is one or more of oxide of copper, cerium and lanthanum. The other active ingredients are mainly titanium dioxide. The preparation method of the catalyst comprises the modes such as dipping the first active component and the second active component in titanium dioxide carrier and the like. In the invention, the activity of the catalyst is high, the sulfation resistance is achieved, and the honeycomb catalyst can be used for carrying out catalytic incineration treatment of waste gas of compounds containing hydrogen sulfide, carbon disulfide or carbonyl sulfide and the like, and oxidizing the waste gas into sulfur, sulfur dioxide and water. Under suitable conditions, the oxidation rate of the hydrogen sulfide is 100%, and the oxidation rate of carbonyl sulfide is higher than 85%.

Description

technical field [0001] The invention relates to a hydrogen sulfide-containing gas incineration catalyst and a preparation method thereof, which is suitable for the treatment of various waste gases containing sulfur-containing compounds such as hydrogen sulfide, carbon disulfide and carbonyl sulfide, and can convert the above-mentioned sulfide into sulfur dioxide with low odor and toxicity Or sulfur, especially suitable for catalytic incineration treatment of sulfur recovery Claus process tail gas and geothermal power plant waste gas. Background technique [0002] Hydrogen sulfide and organic sulfides (such as carbon disulfide, carbonyl sulfide, etc.) are a class of odorous pollutants with varying degrees of toxicity to the human body, mainly from industrial exhaust gases such as oil refining, natural gas, chemical industry, sewage treatment, and geothermal power generation. Pollutant discharge standard (GB 14554-93) strictly limits its discharge. Taking an oil refinery as a...

Claims

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Application Information

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IPC IPC(8): B01J23/843B01J23/18B01J35/04B01D53/52B01D53/48B01D53/86C01B17/52
Inventor 李凌波刘忠生
Owner CHINA PETROLEUM & CHEM CORP
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