Catalyst for eliminating carbon smoke from copper and cerium and preparing method

A catalyst and soot technology, applied in the direction of catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve problems such as threats to human health and carcinogenicity, and achieve low production costs, accelerated combustion speed, and low temperature requirements required effect

Inactive Publication Date: 2009-07-29
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the harmful particles emitted by diesel engines are much higher than gasoline engines, especially soot particles with a diameter of 0.01-10 microns have carcinogenic effects and seriously threaten human health. This has become one of the bottlenecks restricting the further application of diesel engines

Method used

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  • Catalyst for eliminating carbon smoke from copper and cerium and preparing method
  • Catalyst for eliminating carbon smoke from copper and cerium and preparing method
  • Catalyst for eliminating carbon smoke from copper and cerium and preparing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] In the beaker of 200ml, add the water of 7.462g cerous nitrate, 0.462g cupric nitrate and 60ml, stir and dissolve, then add 5.393g citric acid under the condition of room temperature and stirring, add dropwise 0.5ml polyethylene glycol ( Molecular weight 400), after the dropwise addition, heat and stir at 80°C until the water evaporates to produce a viscous colloid. Then the obtained colloid was dried at 110°C in the air atmosphere for 12 hours, taken out and ground into fine powder, pre-fired at 300°C for 1 hour, calcined at 500°C for 3 hours, and the catalyst was obtained after furnace cooling, abbreviated as Cu 0.1 Ce 0.9 o 1.9 . The content of copper in the catalyst is 10 mol%.

Embodiment 2

[0029] In the beaker of 200ml, add the water of 14.427g ceric ammonium nitrate, 1.589g copper nitrate and 100ml, stir and dissolve, then add 10.138g citric acid under the condition of stirring at room temperature, add dropwise 1.0ml polyethylene glycol ( Molecular weight 200), after the dropwise addition, heat and stir at 80°C until the water evaporates to produce a viscous colloid. Then the obtained colloid was dried at 110°C in the air atmosphere for 12 hours, taken out and ground into fine powder, pre-fired at 300°C for 1 hour, calcined at 500°C for 3 hours, and the catalyst was obtained after furnace cooling, abbreviated as Cu 0.2 Ce 0.8 o 1.8 . The content of copper in the catalyst is 20 mol%.

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PUM

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Abstract

The invention discloses a belongs to exhaust gas catalyst technology area, specially relates to a removable copper cerium carbon smoke catalyst of selective oxidation removing diesel truck exhaust gas carbon smoke and its preparation method. Its characteristic is: used soluble cerium salt and copper salt as raw materials, a certain mole rate citric acid as complexant, a few assemble ethylene glycol as thickener, adjust the different Cu / Ce mole rate, use sol-gel method prepare CuxCe1-xO2-x catalyst, with the catalyst, the carbon smoke temperature can reduced from about 550degree centigrade to 320~420degree centigrade, carbon smoke in the oxygen-enriched atmosphere oxidized to CO2 removing, basically no CO in the products, and has better high temperature steady. Fundamentally the invention satisfied the low temperature require of modern diesel truck exhaust, and greatly increased the burning velocity, the particle trap can quickly rebirth.

Description

[0001] Technical field [0002] The invention belongs to the technical field of diesel vehicle exhaust catalysts, in particular to a copper cerium soot removal catalyst for selective oxidation and removal of diesel vehicle exhaust soot and a preparation method thereof. Background technique [0003] Diesel engine is a widely used power device with good power, economy and durability. However, the harmful particles emitted by diesel engines are much higher than gasoline engines, especially soot particles with a diameter of 0.01-10 microns are carcinogenic and seriously threaten human health. This has become one of the bottlenecks restricting the further application of diesel engines. At present, installing a particulate filter on the exhaust line of a diesel engine is an effective and economical aftertreatment technology. It collects the soot particles in the diesel engine exhaust in the trap by means of interception and deposition. When the soot accumulates to a certain extent,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/83B01J37/03B01D53/94
CPCY02T10/24Y02T10/12
Inventor 吴晓东梁清翁端
Owner TSINGHUA UNIV
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