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Aluminum-cerium composite oxide catalyst as well as preparation method and application thereof

A kind of composite oxide, catalyst technology

Active Publication Date: 2021-08-03
GUIZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the single metal oxide support has disadvantages such as low activity, poor thermal stability, and poor toxicity resistance, so it needs to be modified by adding another metal
CeO 2 It has excellent oxygen storage and oxygen release capacity, and it is mainly expressed as Ce in the oxidation-reduction reaction 4+ / C 3+ Interconversion, but CeO 2 Disadvantages such as small specific surface area and poor thermal stability

Method used

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  • Aluminum-cerium composite oxide catalyst as well as preparation method and application thereof
  • Aluminum-cerium composite oxide catalyst as well as preparation method and application thereof
  • Aluminum-cerium composite oxide catalyst as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Example 1: 5wt% CuO / Al 1 Ce 1 Preparation of composite oxide catalysts;

[0039] 3.0010g of Al(NO 3 ) 3 9H 2 O and 3.4729g of Ce(NO 3 ) 3 ·6H 2 O was dissolved in 80ml deionized water, and 0.1618g of PEG-6000 was added at the same time to obtain A mixed solution. Under stirring at 400 rpm / min, 25% ammonia water was added dropwise as a precipitating agent, the pH of the solution was controlled to be 9, and the stirring was continued for 1 hour. The temperature of the water bath was controlled at 40° C., and the B reaction solution was obtained at this time. Add the B reaction solution into a polytetrafluoro-lined hydrothermal kettle, raise the temperature to 180°C, and react for 24 hours to obtain a suspension; centrifuge the suspension, wash, dry at 100°C, grind, roast at 550°C, and keep warm for 4 hours to obtain al 1 Ce 1 Composite oxide carrier powder. to Cu(NO 3 ) 2 ·3H 2 Add 1 g of Al to the O solution 1 Ce 1 The composite oxide carrier was impregna...

Embodiment 2

[0040] Example 2: 7wt% CuO / Al 1 Ce 1 Preparation of composite oxide catalysts;

[0041] 3.0010g of Al(NO 3 ) 3 9H 2 O and 3.4729g of Ce(NO 3 ) 3 ·6H 2 O was dissolved in 80ml deionized water, and 0.1618g of PEG-6000 was added at the same time to obtain A mixed solution. Under stirring at 400 rpm / min, 25% ammonia water was added dropwise as a precipitating agent, the pH of the solution was controlled to be 9, and the stirring was continued for 1 hour. The temperature of the water bath was controlled at 40° C., and the B reaction solution was obtained at this time. Add the B reaction solution into a polytetrafluoro-lined hydrothermal kettle, raise the temperature to 180°C, and react for 24 hours to obtain a suspension; centrifuge the suspension, wash, dry at 100°C, grind, roast at 550°C, and keep warm for 4 hours to obtain al 1 Ce 1 Composite oxide carrier powder. to Cu(NO 3 ) 2 ·3H 2 Add 1 g of Al to the O solution 1 Ce 1 The composite oxide carrier was impregna...

Embodiment 3

[0042] Example 3: 10wt% CuO / Al 1 Ce 1 Preparation of composite oxide catalysts;

[0043] 3.0010g of Al(NO 3 ) 3 9H 2 O and 3.4729g of Ce(NO 3 ) 3 ·6H 2 O was dissolved in 80ml deionized water, and 0.1618g of PEG-6000 was added at the same time to obtain A mixed solution. Under stirring at 400 rpm / min, 25% ammonia water was added dropwise as a precipitating agent, the pH of the solution was controlled to be 9, and the stirring was continued for 1 hour. The temperature of the water bath was controlled at 40° C., and the B reaction solution was obtained at this time. Add the B reaction solution into a polytetrafluoro-lined hydrothermal kettle, raise the temperature to 180°C, and react for 24 hours to obtain a suspension; centrifuge the suspension, wash, dry at 100°C, grind, roast at 550°C, and keep warm for 4 hours to obtain al 1 Ce 1 Composite oxide carrier powder. to Cu(NO 3 ) 2 ·3H 2 Add 1 g of Al to the O solution 1 Ce 1 The composite oxide carrier was impregn...

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Abstract

The invention discloses an aluminum-cerium composite oxide catalyst as well as a preparation method and application thereof. An AlxCey composite oxide carrier is prepared by adopting a hydrothermal method, CuO is loaded by adopting an impregnation method to obtain a series of mCuO / AlxCey composite oxide catalysts, wherein m represents the loading capacity of active components and is equal to 5-20wt%, x / y represents the molar ratio of Al / Ce, and x / y = (1-3): (1-3). The mCuO / AlxCey composite oxide catalyst is applied to the field of catalytic oxidation of CO and HC. The results show that the T50 of the 15wt% CuO / Al1Ce1 composite oxide catalyst prepared by the hydrothermal method to CO is 67 DEG C, the T90 of th catalyst to CO is 112 DEG C, the T50 to C3H8 is 325 DEG C, and the T90 to C3H8 is 400 DEG C. Compared with a coprecipitation method, the powder prepared by the hydrothermal method has the advantages of complete crystal grain development, small particle size, uniform distribution and no agglomeration phenomenon, and the catalytic oxidation performance is obviously improved.

Description

technical field [0001] The invention relates to a composite oxide catalyst, in particular to an aluminum-cerium composite oxide catalyst, a preparation method and application thereof. Background technique [0002] As we all know, with the rapid development of the global economy and the continuous progress of the automobile industry, diesel vehicles are widely used due to their advantages such as low fuel consumption, high thermal efficiency, and good stability. However, carbon monoxide (CO), hydrocarbons (HC), and nitrogen oxides (NO) x ), particulate matter (PM) and sulfur dioxide (SO 2 ) and other harmful pollutants are the main causes of smog and acid rain, posing a serious threat to human health and the environment. [0003] At present, an integrated catalyst system for diesel vehicles has been developed, which consists of an oxidation catalyst (DOC), a diesel particulate filter (DPF) and a selective catalytic reduction technology (SCR). DOC is mainly used to oxidize ...

Claims

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Application Information

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IPC IPC(8): B01J23/83B01J37/03B01J37/10B01J37/08B01J37/02B01D53/86B01D53/62B01D53/72
CPCB01J23/83B01J23/002B01J37/031B01J37/10B01J37/082B01J37/0201B01J37/088B01D53/864B01D2257/502B01D2257/7022B01J2523/00B01J2523/17B01J2523/31B01J2523/3712Y02T10/12
Inventor 田蒙奎李帆谭义凤赵冰李茂坤
Owner GUIZHOU UNIV
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