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Nano-quantum-dot-level fuel borne catalyst for diesel vehicle as well as preparation method and application thereof

A technology of nano-quantum dots and catalysts, which is applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc. and other problems, to achieve the effect of convenient operation, more selectivity of raw materials, and simple reaction

Inactive Publication Date: 2011-07-20
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although a lot of work has been done in the literature, there are shortcomings such as large synthetic particles, complicated methods, high precursor prices, or incapable of industrial production.

Method used

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  • Nano-quantum-dot-level fuel borne catalyst for diesel vehicle as well as preparation method and application thereof
  • Nano-quantum-dot-level fuel borne catalyst for diesel vehicle as well as preparation method and application thereof
  • Nano-quantum-dot-level fuel borne catalyst for diesel vehicle as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Weigh 0.868 g Ce(NO 3 ) 3 ·6H 2O was added to a three-necked flask containing 50 mL of triethylene glycol, condensed and refluxed at 100 °C for 30 min, and then heated to 160 °C and condensed and refluxed for 30 min to obtain quantum CeO below 5 nm. 2 colloid.

Embodiment 2

[0037] Weigh 0.7812 g Ce(NO 3 ) 3 ·6H 2 O and 0.0808 g Fe(NO 3 ) 3 9H 2 O was added to a three-necked flask containing 50 mL of triethylene glycol, condensed and refluxed at a temperature of 100 °C for 30 min, continued to heat up to 200 °C and kept at this temperature for 90 min to obtain Colloidal cerium-iron composite oxide, in which the atomic ratio of Fe / (Ce+Fe) is 10%.

Embodiment 3

[0039] By deposition precipitation method, the CeO 2 Deposited on the soot to achieve the effect of close contact between soot and catalyst, the ratio of soot to catalyst is 1:9. The specific method is to add 0.0396 g of soot to 50 mLCeO 2 In the colloid, ultrasonically disperse for 30 minutes and mix evenly, then add absolute ethanol and ammonia water to the mixture according to the ratio of 1:1:1.5, centrifuge at 9000 r / min for 60 minutes, and the obtained precipitate is vacuum-dried in a vacuum oven at 80 °C 24 h, to get CeO 2 Samples in close contact with soot.

[0040] o 2 The temperature-programmed oxidation test was carried out in a fixed-bed reactor. Dilute 50 mg CeO with quartz wool 2 The sample and soot sample were packaged in a quartz reaction tube, heated to 200 °C in 50 mL / min He gas, and pretreated for 30 min. After cooling down to room temperature, switch to a reaction gas of 200 mL / min, where O 2 The concentration is 5 vol.%, and the balance gas is He ga...

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Abstract

The invention discloses a nano-quantum-dot-level fuel borne catalyst for a diesel vehicle as well as a preparation method and an application thereof, and the preparation method comprises the following steps: adding a trivalent cerium metal salt or a mixture of trivalent cerium and a trivalent iron metal salt into alcohol ether, and preparing a solution enabling the total concentration of cations to be 0.001-0.04mol / L; and adopting the two-section heating method to perform a heating reaction on the solution, firstly heating to 100 DEG C, condensing, refluxing till the solution is uniformly mixed, then heating to 160-200 DEG C, performing the reaction till the color of the solution changes, and finally getting a cerium oxide catalyst or a cerium-iron composite oxide catalyst. In the preparation method, pH does not need to be regulated, the reaction is performed at normal temperature and normal pressure, the reaction is simple and can be controlled through the temperature, the operation is convenient, the appearance of the catalyst can achieve 100%, the yield is high, and the catalyst can be applied in diesel engineering machinery, diesel trucks, diesel passenger vehicles, diesel urban buses and other tools in a large-scale manner.

Description

technical field [0001] The invention relates to a diesel vehicle catalyst and its preparation method and application, in particular to a diesel vehicle fuel-adding catalyst used for regeneration of particulate matter traps and reducing part of nitrogen oxides, and its preparation method and application, belonging to diesel vehicles Particle filter regeneration and catalyst technology. Background technique [0002] Diesel engines are widely used for their good power, economy and reliability. PM and NO x These are the two major pollutants emitted by diesel engines. The main means to achieve PM emission control at this stage is to install a wall-flow DPF (diesel particulate filter) in the exhaust pipe. DPF achieves the purpose of removing particles in the exhaust gas through diffusion, deposition and impact collection. However, due to the continuous deposition of PM on the DPF, the back pressure continues to increase, and it must be removed in time to promote its regenerati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/745B01J23/83B01D53/94B01D53/56B82Y40/00
Inventor 张昭良杨曦辛颖蒋品王仲鹏李倩
Owner UNIV OF JINAN
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