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A kind of monolithic cdpf composite material for diesel vehicles and preparation method thereof

A composite material and integrated technology, which is applied in the field of integral cDPF composite materials for diesel vehicles and its preparation, can solve the problems of increased DPF back pressure, affecting the normal operation of the engine, etc., and achieves improved filtration efficiency, high-efficiency filtration performance and passive The effect of regeneration performance, high specific surface area

Active Publication Date: 2021-11-02
CATARC AUTOMOTIVE TEST CENT TIANJIN CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, as the DPF captures soot particles for a longer period of time, soot particles will accumulate on the surface of the DPF, which will increase the back pressure of the DPF and affect the normal operation of the engine.

Method used

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  • A kind of monolithic cdpf composite material for diesel vehicles and preparation method thereof
  • A kind of monolithic cdpf composite material for diesel vehicles and preparation method thereof
  • A kind of monolithic cdpf composite material for diesel vehicles and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Step 1: Roasting aluminum sulfate octadecahydrate at a certain temperature for a certain period of time to obtain dehydrated aluminum sulfate.

[0034] Step 2: Weigh diatomite, aluminum sulfate and sodium sulfate according to the ratio of 1:3:40, grind and mix them evenly with a mortar, cover them on the cordierite sample in the crucible and make The cordierite can be completely covered, and then the crucible is put into a muffle furnace and fired at 1000° C. for 3 hours to obtain whisker-modified cordierite.

[0035] Step 3: Weigh lanthanum nitrate, cobalt nitrate, and manganese acetate according to the ratio of 1:0.9:0.1. Add deionized water and stir for a while to form a solution. After the solute is completely dissolved, add citric acid to form a mixture of a certain concentration. solution. The amount of substances added by citric acid is the sum of the amounts of substances of lanthanum nitrate, cobalt nitrate, and manganese acetate.

[0036] Step 4: Put the mix...

Embodiment 2

[0039] This example provides a method for preparing an integral cDPF composite material for diesel vehicles. The difference between this example and Example 1 is that the ratio of lanthanum nitrate, cobalt nitrate, and manganese acetate is 1:0.8:0.2.

Embodiment 3

[0041] This example provides a method for preparing an integral cDPF composite material for diesel vehicles. The difference between this example and Example 1 is that the ratio of lanthanum nitrate, cobalt nitrate, and manganese acetate is 1:0.7:0.3.

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PUM

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Abstract

The invention provides an integral cDPF composite material for diesel vehicles and a preparation method thereof, comprising the following steps: preparing cordierite modified by whiskers; mixing lanthanum nitrate, cobalt nitrate, manganese acetate, deionized water and citric acid It is configured into a mixed solution; the cordierite is immersed in the mixed solution, taken out and dried, and then placed in a muffle furnace for roasting to obtain a product. The composite material of the present invention uses the cordierite modified on the surface of the mullite whisker as the substrate, has a higher specific surface area, can support more catalysts, greatly improves the filtration efficiency of the DPF, and supports the surface of the whisker. The perovskite LaCoO3 catalyst can realize passive regeneration of DPF, and the prepared monolithic cDPF composite has high filtration performance and passive regeneration performance.

Description

technical field [0001] The invention belongs to the technical field of diesel vehicle tail gas treatment, and in particular relates to an integral cDPF composite material for diesel vehicles and a preparation method thereof. Background technique [0002] The diesel particulate filter (Diesel Particulate Filter, DPF for short) has a high efficiency of particulate matter purification, and is recognized as the most effective way of post-treatment of diesel soot particles. DPF often adopts a wall-flow design. This design allows the exhaust gas to pass through the porous ceramic wall from one end of the opening and then enter the adjacent outlet channel. At this time, the particles in the exhaust gas will stay on the porous ceramic wall. capture of particulate matter. Cordierite-based honeycomb ceramic is an excellent DPF material, its chemical composition is: 2MgO: 5SiO 2 : 2Al 2 o 3 , and has high mechanical strength, low thermal expansion coefficient and good high temperat...

Claims

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Application Information

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IPC IPC(8): B01J23/889B01J23/83B01J37/02B01J37/08B01J35/10B01J32/00B01J21/14B01D53/94
CPCB01J23/8892B01J23/83B01J37/0201B01J37/082B01J37/086B01J23/002B01J21/14B01D53/94B01J2523/00B01D2258/01B01J35/61
Inventor 李振国温伯霖邵元凯孔祥辰任晓宁李凯祥吕从杰
Owner CATARC AUTOMOTIVE TEST CENT TIANJIN CO LTD