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Catalyst used for diesel engine tail gas soot collection catalysis

A catalyst and diesel engine technology, applied in the direction of physical/chemical process catalysts, catalyst carriers, catalyst activation/preparation, etc., can solve the problems of increasing the cost of diesel engine exhaust treatment, cumbersome catalyst devices, and high cost, so as to improve the anti-sulfur performance and improve Anti-corrosion performance, the effect of improving the anti-sulfur performance

Inactive Publication Date: 2014-06-18
SHANGHAI LANGT AUTOCATALYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The catalyst device is cumbersome and costly, which increases the exhaust gas treatment cost of the diesel engine; at the same time, the pressure drop is high and it is easy to be poisoned

Method used

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  • Catalyst used for diesel engine tail gas soot collection catalysis
  • Catalyst used for diesel engine tail gas soot collection catalysis
  • Catalyst used for diesel engine tail gas soot collection catalysis

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Embodiment 1 prepares blue liquid

[0051] Mix sodium nitrite, sodium nitrate, sodium hydroxide, sodium carbonate, and water glass in a mass ratio of 5:15:5:5:1, and then add water. The water content accounts for 90% of the weight of the final bluish liquid.

Embodiment 2

[0052] Embodiment 2 prepares blue liquid

[0053] Mix sodium nitrite, sodium nitrate, sodium hydroxide, sodium carbonate, and water glass in a mass ratio of 3:10:3:8:2, and then add water. The water content accounts for 85% of the weight of the final bluish liquid.

Embodiment 3

[0054] Embodiment 3 prepares stainless steel mesh catalyst according to following steps successively

[0055] 1. adopt the blue liquid of embodiment 1;

[0056] 2. Select a stainless steel screen with an aperture of 0.2mm, a chemical composition of 6% aluminum, 20% chromium and 84% iron, and the wire diameter of the screen is 0.1mm;

[0057] 3. Treat the stainless steel screen with the bluing liquid: put the stainless steel screen in the bluing liquid and heat and boil for 15 minutes at a heating temperature of 90°C;

[0058] 4. Preparation of rare earth solution: Ce 2 (SO 4 ) 3 and H 2 o 2 Mix according to the ratio of 20:1, then add water, and finally the mass concentration of the rare earth solution is 30%;

[0059] 5. Preparation of titanium liquid: Titanium sulfate, nickel sulfate, nickel chloride, boric acid, sodium lauryl sulfate and saccharin are mixed according to the mass ratio of 76:7:7:3:5:2 to obtain titanium liquid;

[0060] 6. Prepare precious metal solut...

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Abstract

The invention provides a catalyst used for diesel engine tail gas soot collection catalysis. The catalyst is prepared via following processing on stainless steel meshes: the stainless steel meshes are subjected to bluing liquid treatment, electroplating, and pressure wave treatment, are cut into strips, are rolled, and then are delivered into stainless steel pipes for encapsulation brazing. The catalyst can be used for diesel engine tail gas soot collection catalysis; pressure reduction is less; and catalysis performance is excellent.

Description

technical field [0001] The invention relates to the field of motor vehicle tail gas treatment, in particular to a catalyst carrier used for collecting and catalyzing soot from diesel engine tail gas. Background technique [0002] In recent years, the particulate matter (hereinafter referred to as "PM"), especially in diesel engine exhaust, mainly contains solid carbon particles (hereinafter referred to as "SOOT"), sulfates (hereinafter referred to as "sulfates"), and liquid macromolecules. Hydrocarbon particles (hereinafter referred to as "SOF") have caused environmental health problems. The particle size of PM is generally between 0.01 μm and 10 μm, and 90% of the particles are less than 1 μm in size, so they are easy to float in the air and pass through the respiratory tract into the human body. Therefore, the government formulates relevant policies to strengthen the control of PM emissions from diesel engines. At the same time, when the diesel engine is operating optima...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/89B01J32/00B01J37/34B01D53/94
Inventor 张现龙姜瑞霞焦雪静张蓓周坚刚
Owner SHANGHAI LANGT AUTOCATALYST
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