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Catalyst for decontaminating tail gas of motorcar and preparation method

A technology for purifying catalysts and automobile exhaust. It is applied in the direction of physical/chemical process catalysts, molecular sieve catalysts, chemical instruments and methods, etc. It can solve the problems of poor purification effect and high activation temperature, and achieve enhanced adsorption capacity, low cost and excellent preparation process. simple effect

Inactive Publication Date: 2005-03-30
昆明贵研催化剂有限责任公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can solve the problems of high activation temperature and poor purification effect of current automobile catalysts

Method used

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  • Catalyst for decontaminating tail gas of motorcar and preparation method
  • Catalyst for decontaminating tail gas of motorcar and preparation method
  • Catalyst for decontaminating tail gas of motorcar and preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0032] 200 grams of aluminum glue (containing 72% γ-Al 2 o 3 ) dry powder, 50 grams of mordenite dry powder and 100 grams of La-Ce-Zr solid solution powder and (75% Mn-25% Pr) composite oxide mixed, add 500 milliliters of aqueous solutions that have dissolved 10 grams of barium nitrate, in constant stirring Under the circumstances, it is formulated as a coating slurry. Immerse the ceramic honeycomb carrier in the slurry for 2 minutes and take it out, then dry it at 100°C for 3 hours, and bake it at 600°C for 2 hours to obtain a coated carrier with firm surface coating. Immerse it in pH=5, Pd(NO 3 ) 2 The solution was soaked for 30 minutes, dried at 100° C. for 3 hours, and calcined at 400° C. for 2 hours to obtain a Pd-loaded catalyst. This catalyst is then immersed in pH=5, mass percent concentration is 0.4% Pt(NH 3 NO 2 ) 2 and Rh(NO 3 ) 3 In the mixed solution, soaked for 30 minutes, dried at 100°C for 3 hours, and calcined at 400°C for 2 hours to obtain the final ...

Embodiment 2

[0034] 300 grams of aluminum glue (containing 72% γ-Al 2 o 3 ) dry powder, 60 grams of Cu replacement mordenite dry powder, 200 grams of La-Ce-Zr solid solution powder and (80% Mn-20% V) after mixing, add and dissolve 600 milliliters of aqueous solutions of 15 grams of barium nitrate and 15 grams of cobalt nitrate, Make a coating slurry under constant stirring. Immerse the ceramic honeycomb carrier in the slurry for 2 minutes and take it out, then dry it at 100°C for 4 hours, and bake it at 600°C for 2 hours to obtain a coated carrier with firm surface coating. Immerse it in pH=5, Pd(NO 2 ) 2 (NH 3 ) 2 The solution was immersed for 30 minutes, dried at 100° C. for 3 hours, and calcined at 300° C. for 3 hours to obtain a Pd-loaded catalyst. This catalyst is then immersed in pH=5, mass percent concentration is 0.4% Pt(NO 2 ) 2 (NH 2 Oh) 2 and [Rh(NH 3 ) 6 ](NO 3 ) 3 In the mixed solution, soaked for 30 minutes, dried at 100°C for 4 hours, and calcined at 300°C for ...

Embodiment 3

[0036] 400 grams of aluminum glue (containing 72% γ-Al 2 o 3 ) dry powder, 200 grams of Cu replacement mordenite dry powder, 200 grams of Ce-Zr solid solution powder and (50% La-30% Mn-20% Pr) composite oxide are mixed, add and dissolve 600 milliliters of aqueous solutions of 20 grams of barium nitrate, Make a coating slurry under constant stirring. Immerse the ceramic honeycomb carrier in the slurry for 2 minutes and take it out, then dry it at 100°C for 4 hours, and bake it at 600°C for 2 hours to obtain a coated carrier with firm surface coating. Immerse it in pH=5, Pd(NO 2 ) 2 (NH 3 ) 2 The solution was immersed for 30 minutes, dried at 100° C. for 3 hours, and calcined at 300° C. for 3 hours to obtain a Pd-loaded catalyst. This catalyst is then immersed in pH=5, mass percent concentration is 0.4% Pt(NH 3 NO 2 ) 2 and [Rh(OH)(NH 3 ) 5 ](NO 3 ) 2 In the mixed solution, soaked for 30 minutes, dried at 100°C for 4 hours, and calcined at 300°C for 3 hours to obtai...

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Abstract

A catalyst for cleaning the tail gas of car is prepared from the cordierite ceramics as carrier, the Al gel and mordinate as basic layer of coated layer, the La-Ce-Zr sosoloid or one or more oxides of La, Ce, Zr and Mn as assistant and the Pt, Pd and Rh as active components through mixing Al gel, mordenite, assistant and distilled water to obtain slurry, immersing carrier in it, drying, calcining, immersing in the solution of noble metal precursor, drying and calcining.

Description

technical field [0001] The invention relates to a motor vehicle exhaust gas purification catalyst and a preparation method thereof, in particular to a rare earth composite oxide-precious metal honeycomb catalyst for three-way catalytic purification of automobile pollutants (CO, CHs, NOx) and a preparation method thereof. Background technique [0002] With the rapid development of the automobile industry, automobile exhaust has become the main mobile pollution source that endangers human health. In order to control automobile exhaust pollution, people formulate a series of automobile emission regulations. China began to adopt the European emission regulation system in the 1990s, and fully implemented Euro I, Euro II, and Euro III standards in 2001, 2004, and 2008, respectively. Beijing will implement the Euro III standard in 2005 ahead of schedule in order to coordinate with the victory of the 2008 Olympic Games. Compared with the Euro II standard, the Euro III standard is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/92B01J23/40B01J29/22
Inventor 张爱敏贺小昆赵云昆顾永万桓源峰杨冬霞计永波吴乐刚刘沁曦钱琳黄荣光
Owner 昆明贵研催化剂有限责任公司
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