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Catalyst carrier composite for resisting high temperature sintering and preparation method thereof

A technology of catalyst carrier and composite material, applied in the direction of catalyst carrier, chemical instrument and method, physical/chemical process catalyst, etc., can solve the problems of limitation, thermal shock resistance, poor mechanical strength at high temperature and chemical stability, etc. The effect of stability, excellent high temperature sintering resistance, and simple preparation method

Inactive Publication Date: 2014-01-01
INNER MONGOLIA INORWICH TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because these carrier materials are prone to crystal transformation or solid-state reaction at higher temperatures, thermal shock resistance, high-temperature mechanical strength and chemical stability are poor, so the application under high-temperature combustion conditions is limited.

Method used

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  • Catalyst carrier composite for resisting high temperature sintering and preparation method thereof
  • Catalyst carrier composite for resisting high temperature sintering and preparation method thereof
  • Catalyst carrier composite for resisting high temperature sintering and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] 0.85g (4.0×10 -3 mol)Sr(NO 3 ) 2 , 2.138g (8×10 -3 mol)ZrO(NO 3 ) 2 2H 2 O with 1.73g (4.0×10 -3 mol)La(NO 3 ) 3 ·6H 2 O was dissolved in deionized water to obtain a mixed solution (1); 3 g of PVP was dissolved in absolute ethanol and stirred with electromagnetic stirring for 1 h to obtain a solution (2); the solutions (1) and (2) were mixed and stirred with electromagnetic stirring for 3 h The solution (3) was obtained; the mixed solution (3) was evaporated to dryness at 80°C in a water bath, and then calcined at 1000°C for 6h to obtain the powder (4), that is, the catalyst carrier composite material powder Sr 0.5 La 0.5 ZrO 3.25 . figure 1 is the Sr after 6h after calcination at 1000℃ 0.5 La 0.5 ZrO 3.25 The XRD pattern of the powder, indicating the generation of SrZrO 3 with La 2 Zr 2 o 7 two-phase composites. The powder was calcined at high temperature to test its high temperature sintering resistance and phase stability. Among them, the specifi...

Embodiment 2

[0021] 1.016g (4.8×10 -3 mol)Sr(NO 3 ) 2 , 2.138g (8×10 -3 mol)ZrO(NO 3 ) 2 2H 2 O with 1.442g (3.2×10 -3 mol)Sm(NO 3 ) 3 ·6H 2 O was dissolved in deionized water to prepare a mixed solution (1); 4g of PVP was dissolved in absolute ethanol and stirred with electromagnetic stirring for 2h to prepare a solution (2); the solutions (1) and (2) were mixed and stirred with electromagnetic stirring for 4h The solution (3) was prepared; the mixed solution (3) was evaporated to dryness at 70°C in a water bath, and then calcined at 1000°C for 8h to obtain the powder (4), that is, the catalyst carrier composite material powder Sr 0.6 SM 0.4 ZrO 3.2 . After the powder was calcined at 1000°C and 1400°C for 12 hours, the specific surface area reached 10.85m 2 g -1 and 6.27m 2 g -1 . After the powder was calcined at 1400°C for 50h, the SrZrO 3 with La 2 Zr 2 o 7 two-phase composition.

Embodiment 3

[0023] 0.508g (2.4×10 -3 mol)Sr(NO 3 ) 2 , 2.138g (8×10 -3 mol)ZrO(NO 3 ) 2 2H 2 O with 2.498g (5.6×10 -3 mol)Eu(NO 3 ) 3 ·6H 2 O was dissolved in deionized water to make a mixed solution (1); 5g of PVP was dissolved in absolute ethanol and stirred with electromagnetic stirring for 3h to make a solution (2); the solutions (1) and (2) were mixed and stirred with electromagnetic stirring for 4h The solution (3) is prepared; the mixed solution (3) is evaporated to dryness in a water bath at 80°C, and then calcined at 1000°C for 10 hours to obtain the powder (4), that is, the catalyst carrier composite material powder Sr 0.3 Eu 0.7 ZrO 3.35 . After the powder was calcined at 1000°C and 1400°C for 12 hours, the specific surface area reached 10.15m 2 g -1 and 5.93m 2 g -1 . After the powder was calcined at 1400°C for 50h, the SrZrO 3 with La 2 Zr 2 o 7 two-phase composition.

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Abstract

The invention relates to a catalyst carrier material for resisting high temperature sintering and a preparation method thereof. The material is powder or fiber and the chemical composition of the material is [Sr(1-x)RxZrO(3+delta), wherein x more than or equal to 0.1 and is less than or equal to 0.9; and R is one of La, Nd, Sm, Eu, Gd and Dy. The material has the following advantages: the material has excellent sintering resistance; the specific surface areas of the powder and fiber can respectively reach 3.50-5.20m<2>.g<-1> and 5.00-6.70m<2>.g<-1> after heat treatment is carried out on the powder and fiber at 1400 DEG C for 50 hours; the fiber structure can improve the sintering resistance of the material; undergoing long-term heat treatment at 1400 DEG C or high temperature quenching to the room temperature, the material still keeps stable crystal structure, without phase change; the coefficient of heat expansion of the material is 8.0*10<-6>K<-1>-12.0*10<-6>K<-1>; and the material is used for catalytic combustion in gas turbines and boilers.

Description

technical field [0001] The invention relates to a class of catalyst carrier materials, in particular to a catalyst carrier composite material resistant to high temperature sintering. Background technique [0002] As a clean energy with abundant reserves, natural gas produces ash, CO 2 , CO, SO 2 The average is much lower than that of coal and oil. Using it as an alternative energy source can not only alleviate part of the energy crisis, but also greatly reduce environmental pollution caused by burning coal. With the further implementation of my country's western development strategy, more and more attention has been paid to natural gas as industrial and civil fuels such as power generation and chemical industry. As the main component of natural gas, methane is a high-quality clean fuel, but in the process of using gas turbines to generate electricity, the flame adiabatic temperature exceeds 2000 ° C, which promotes the N in the air 2 and O 2 react to produce NO x ; At ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J32/00B01J23/10
Inventor 马文刘伟董红英王平贾志成王建军
Owner INNER MONGOLIA INORWICH TECH
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