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Honeycomb catalyst for catalytically incinerating sulfur recovery tail gases and preparation method

A catalytic incineration and catalyst technology, applied in physical/chemical process catalysts, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc. High speed, poor sulfur resistance and other problems, to achieve the effects of small air resistance, high operating space velocity, and low catalyst cost

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 have one or more deficiencies in complex components, poor sulfur resistance, high cost, and the need to adopt complex processes. In addition, the above-mentioned catalysts are generally spherical and filled with such catalysts The catalytic incineration reactor bed has a large air resistance and a high operating space velocity

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] 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 solutions B of 25%, 5%, 10% and 60% volume ratios 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. Boil the honeycomb ceramic carrier in 5% nitric acid solution for 30 minutes, take it out, wash it with distilled water for 5 times, and dry it. After immersing the processed honeycomb ceramics in the sol for 2 minutes, take it out slowly, dry it at 105°C, then bake it in a muffle furnace at 500°C for 2 hours, cool it down to room temperature naturally, repeat the above steps 6 times, and obtain the desired titanium dioxide coating thick carrier.

[0019] Weigh 100g oxalic acid (C 2 h 2 o 4 2H 2 ...

Embodiment 2

[0025] The titanium dioxide powder of 300g, the methyl cellulose powder of 5g and the ammonium metavanadate of 20g are mixed and ground 45min in ball mill, add ferric nitrate solution (the Fe(NO of 68g 3 ) 3 9H 2 O dissolved in 70mL distilled water), continue to grind for 15min, and add distilled water to make the ground material evenly mixed into a paste with appropriate hardness, put the paste into a honeycomb mold for extrusion molding, dry at 60°C for 5h and at 105°C 6h, 250°C for 8h and 500°C for 10h. The specific surface area of ​​the prepared catalyst is 1150m 2 / m 3 , the hole spacing is 3.0mm, and the wall thickness is 0.5mm. The composition of the catalyst is V 2 o 5 4.5%, Fe 2 o 3 4.0%, TiO 2 90.5%.

Embodiment 3

[0027] The titanium dioxide powder of 450g, the vanadium pentoxide powder of 25g, the ferric oxide powder of 20g, the polyacrylamide of 6g and the active carbon powder of 2g are mixed and ground 45min in ball mill, while grinding, slowly add ethanolamine solution (ethanolamine and The distilled water volume ratio is 1:5) to make a paste with appropriate hardness, put the paste into a honeycomb mold for extrusion molding, dry at 60°C for 7 hours and 105°C for 4 hours, bake at 250°C for 8 hours and 500°C Roasting 10h. The specific surface area of ​​the prepared catalyst is 980m 2 / m 3 , the hole spacing is 3.0mm, and the wall thickness is 0.5mm. The composition of the catalyst is V 2 o 5 5.0%, Fe 2 o 3 4.0%, TiO 2 91.0%.

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Abstract

The invention provides a honeycomb catalyst for catalytically incinerating sulfur recovery tail gases and a preparation method. The catalyst is a honeycomb monomer and comprises the following active ingredients by weight percent: 1.0-15% of oxide of vanadium, 1.0-12.0% of oxide of iron and 73-98% of oxide of titanium. The preparation method is characterized by dipping vanadium and iron on a honeycomb titanium dioxide carrier. The catalyst has the characteristics of high performance, low cost, simple adaptable process, high removal rates of hydrogen sulfide and carbonyl sulfide and the like, and can be used for incinerating compounds in the sulfur recovery tail gases or other waste gases, such as hydrogen sulfide, carbon disulfide, carbonyl sulfide and the like.

Description

technical field [0001] The invention relates to a honeycomb catalyst for sulfur recovery tail gas catalytic incineration and a preparation method thereof, which is suitable for the treatment of various waste gases containing sulfur compounds such as hydrogen sulfide, carbon disulfide and carbonyl sulfide, and can convert the above-mentioned sulfides into odor and low toxicity It is especially suitable for catalytic incineration treatment of sulfur recovery Claus process exhaust gas and geothermal power plant exhaust gas. Background technique [0002] Hydrogen sulfide and organic sulfide (such as carbon disulfide, carbonyl sulfide) are a class of odor 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. The pollutant emission standard (GB 14554-93) strictly limits its emission. Taking an oil refinery as an example, most of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/847B01J35/04B01D53/52B01D53/48B01D53/86C01B17/52
Inventor 李凌波刘忠生
Owner CHINA PETROLEUM & CHEM CORP
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