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Sulfureous resistant four-effect catalyst for purifying tail gas of vehicle

A technology of automobile exhaust and catalyst, applied in the field of automobile exhaust purification, can solve the problems of difficult desorption, sulfur poisoning, strong adsorption capacity, etc., and achieve the effect of large geometric surface area, reduced volume and high mechanical strength

Inactive Publication Date: 2011-08-17
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Non-precious metal catalysts have good catalytic activity, which is similar to that of noble metals, but their adsorption capacity is strong and desorption is difficult, especially for SO 2 The adsorption of sulfur is highly prone to sulfur poisoning

Method used

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  • Sulfureous resistant four-effect catalyst for purifying tail gas of vehicle
  • Sulfureous resistant four-effect catalyst for purifying tail gas of vehicle
  • Sulfureous resistant four-effect catalyst for purifying tail gas of vehicle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Take aluminum nitrate nonahydrate (Al(NO 3 ) 3 9H 2 O) 5 grams, nickel nitrate hexahydrate (Ni(NO 3 ) 2 6H 2 O) 5 grams; cobalt nitrate hexahydrate (Co(NO 3 ) 2 6H 2 O) Add 10ml of distilled water to 5 grams, and then mix the aqueous solutions of nitrates, take 1 gram of boric acid and 10 grams of distilled water to make a solution, mix with the nitrate mixed solution, and stir for 0.5 hours at 25°C until all The salt is completely dissolved, and 40 grams of a mixture of nitrate and boric acid is taken out.

[0040] Weigh 2ml of 80% ethanol, 1ml of water, 0.1ml of 65% concentrated nitric acid, mix the three solutions and stir evenly, then weigh 15ml of tetraethylorthosilicate, slowly, intermittently, and simultaneously Pour into the above three mixtures with vigorous stirring to finally form a transparent mixed solution. Use hydrochloric acid to adjust the pH of the solution to 4, then take 15 grams of the pH-adjusted mixed solution, and slow down the solution. Slowly inje...

Embodiment 2

[0047] Take aluminum nitrate nonahydrate (Al(NO 3 ) 3 9H 2 O) 5 grams, manganese nitrate (Mn(NO 3 ) 5 grams, copper nitrate trihydrate (Cu(NO 3 ) 2 3H 2 O) 5g, add 10ml of distilled water respectively, then mix the aqueous solutions of nitrates, take 1g of boric acid and 10ml of distilled water to make a solution, mix with the mixed solution of nitrates, stir at 30℃ for 0.5 hours, until all The salt is completely dissolved, and 35 grams of the mixture of nitrate and boric acid is taken out.

[0048] Weigh 3ml of ethanol with a concentration of 80%, 2ml of water, and 0.1ml of concentrated nitric acid with a concentration of 65%. After the three solutions are mixed and stirred uniformly, weigh out 20ml of tetraethylorthosilicate, slowly, intermittently, and simultaneously Pour into the above three mixtures with vigorous stirring, and finally form a transparent mixed solution. Adjust the pH of the solution to 4, then take 20 grams of the mixed solution with the adjusted pH value and ...

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Abstract

The present invention relates to an anti-sulfur four-way catalyst which is provided with optimal performance and used for purifying automobile exhaust. First, a glass coating solution is prepared, then a metal alloy carrier is repeatedly immerged into the glass coating solution for coating, drying, calcinating so as to get the glass coating on the carrier, then the glass coating is repeatedly immerged into a mixed solution composed of titanium and zirconium salts and into a precious metal catalyst solution; after being baked and calcinated, the anti-sulfur four-way catalyst which is provided with optimal performance and used for purifying automobile exhaust and takes the alloy metal as a carrier is obtained. The four-way catalyst of the present invention has the following advantages that: (1) PM and NOxare catalyzed on the same catalytic bed; (2) the catalytic efficiency is not affected if the concentration of SO2 ranges from 500 to 800ppm; (3) compared with other catalysts, the catalyst has high anti-sulfur performance and takes metal as the carrier. Besides, the catalyst can ensure an engine meeting the emission of European III in a laboratory, a bench experimental testing and application to meet the requirements for emission standards above European IV.

Description

Technical field [0001] The invention belongs to the field of exhaust gas purification of automobiles (including diesel vehicles and gasoline automobiles), and particularly relates to an anti-sulfur four-way catalyst with optimized performance for purifying automobile exhaust. technical background [0002] The development of the automobile industry has brought convenience to human transportation, but it also brought serious air pollution. The exhaust gas emitted by automobiles mainly contains PM, NOx, CO, and HC, which can cause acid rain and urban photochemical smog, affect the ecological environment, and endanger human health. In order to solve this problem, the installation of catalytic converters for exhaust gas is an off-machine purification method commonly used in various countries. The catalyst is the core part of the catalytic converter. It must meet the requirements of high conversion rate, good heat resistance, long service life and good anti-toxicity. The development ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/89B01D53/94
Inventor 韩炜牛晓巍王婧姝
Owner JILIN UNIV
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