Quadruple effect catalyst of diesel tail gas and preparation method and application of quadruple effect catalyst

A catalyst, diesel vehicle technology, applied in chemical instruments and methods, physical/chemical process catalysts, separation methods, etc., can solve the problems of narrow operating temperature window, poor thermal stability, easy sulfur poisoning, etc., to improve storage capacity, reduce Combustion temperature, the effect of reducing emissions

Active Publication Date: 2011-09-21
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the narrow operating temperature window, poor thermal stability and susceptibility to sulfur poisoning limit the practical application of this type of catalyst.

Method used

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  • Quadruple effect catalyst of diesel tail gas and preparation method and application of quadruple effect catalyst
  • Quadruple effect catalyst of diesel tail gas and preparation method and application of quadruple effect catalyst
  • Quadruple effect catalyst of diesel tail gas and preparation method and application of quadruple effect catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Mg(NO 3 ) 2 ?6H 2 O and Al(NO 3 ) 3 ?9H 2 Mixed salt solution of O, Mg 2+ and A1 3+ The total concentration of ions is 1.5 mol / l. Prepare a mixed alkali solution of sodium carbonate and sodium hydroxide at room temperature, (CO 3 2+ ):(OH - ) in a molar ratio of 1:2. The two solutions were dripped into a 500ml beaker filled with a certain amount of deionized water at a certain dropping speed (water temperature 65°C, water volume 100ml), while vigorously stirring to adjust the dropping speed of the two solutions to keep the pH value of the slurry at around 10. After dripping, the resulting slurry was aged at 65°C for half an hour, stirred at room temperature for 18 hours, then suction filtered, and the filter cake was beaten and washed for half an hour, then suction filtered, and repeated several times. Finally, the filter cake was evaporated in an oven at 120°C overnight, and the evaporated filter cake was baked in a horse boiling furnace at 950°C for 12 hour...

Embodiment 2

[0042] Mg(NO 3 ) 2 ?6H 2 O and Al(NO 3 ) 3 ?9H 2 Mixed salt solution of O, Mg 2+ and A1 3+ The total concentration of ions is 1.5 mol / l. Prepare a mixed alkali solution of sodium carbonate and sodium hydroxide at room temperature, (CO 3 2+ ):(OH - ) in a molar ratio of 1:2. The two solutions were dripped into a 500ml beaker filled with a certain amount of deionized water at a certain rate (water temperature 65°C, water volume 100ml), while vigorously stirring to adjust the rate of the two solutions so that the pH value of the slurry was maintained at about 10. After dripping, the resulting slurry was aged at 65°C for half an hour, stirred at room temperature for 18 hours, then suction filtered, and the filter cake was beaten and washed for half an hour, then suction filtered, and repeated several times. Finally, the filter cake was evaporated in an oven at 120°C overnight, and the evaporated filter cake was baked in a horse boiling furnace at 950°C for 12 hours to o...

Embodiment 3

[0045]Mg(NO 3 ) 2 ?6H 2 O and Al(NO 3 ) 3 ?9H 2 Mixed salt solution of O, Mg 2+ and A1 3+ The total concentration of ions is 1.5 mol / l. Prepare a mixed alkali solution of sodium carbonate and sodium hydroxide at room temperature, (CO 3 2+ ):(OH - ) in a molar ratio of 1:2. The two solutions were dripped into a 500ml beaker filled with a certain amount of deionized water at a certain dropping speed (water temperature 60°C, water volume 200ml), while stirring vigorously, adjusting the dropping speed of the two solutions so that the pH value of the slurry remained at about 9.5. After dripping, age the obtained slurry at 60°C for half an hour, stir at room temperature for 18-20 hours, then filter with suction, beat and wash the filter cake for half an hour, and filter with suction again, repeating several times. Finally, the filter cake was evaporated in an oven at 110°C overnight, and the evaporated filter cake was baked in a horse boiling furnace at 900°C for 14 hours...

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PUM

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Abstract

The invention discloses a quadruple effect catalyst of diesel tail gas. The catalyst consists of carrier magnesium-aluminium (Mg-Al) hydrotalcite composite oxide, potassium (K) and noble metal, wherein the K and the noble metal are loaded on the carrier Mg-Al hydrotalcite composite oxide; the noble metal is palladium (Pd), platinum (Pt) or rhodium (Rh); the load capacity of the K is 7 to 10 weight percent; and the load capacity of the noble metal is 1 to 2 weight percent. Meanwhile, the invention also discloses a preparation method and application of the catalyst. The catalyst is simple in preparation and easy to operate; the prepared catalyst can remove four main pollutants, namely carbon smoke particles (PM), nitrogen oxide (NOx), carbon oxide (CO) and unburned hydrocarbons (HC); and after being coated on a diesel particle filter, the catalyst can be directly applied to post-treatment of the diesel tail gas, has a good treatment effect and is applied to industrial promotion.

Description

technical field [0001] The present invention relates to a catalyst for diesel vehicle exhaust treatment and its preparation method and application, in particular to a four-way catalyst capable of simultaneously eliminating soot particles, nitrogen oxides, carbon monoxide and unburned hydrocarbons in diesel vehicle exhaust and its The preparation method and application belong to the technical field of diesel vehicle tail gas catalytic purification. Background technique [0002] China's motor vehicles and the number of vehicles are developing at a high speed, and the emission of motor vehicle pollutants has obviously affected the air quality of big cities. In order to promote the upgrading and progress of automobile industry technology and control the emission level of pollutants, the state has formulated strict emission standards for various types of motor vehicles. The use of exhaust after-treatment technology can effectively control the emission of motor vehicle pollutants...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/58B01D53/94B01D53/56B01D53/62B01D53/72
CPCY02A50/20
Inventor 张昭良张业新辛颖王仲鹏李倩
Owner UNIV OF JINAN
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