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Chemical looping combustion double perovskite type oxide oxygen carrier and preparation method and application thereof

A chemical chain combustion, double perovskite technology, applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, chemical/physical processes, etc. problems such as low reactivity and high reaction temperature, to achieve the effects of good high temperature thermal stability, high activity and simple preparation method

Inactive Publication Date: 2012-05-09
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Relatively speaking, the oxygen carrier NiO / NiAl 2 o 4 (CHO P etc. Fuel, 2004, 83(9)), Fe 2 o 3 / Al 2 o 3 (MATTISSON T etc. Fuel, 2001, 80 (13)) and CoO-NiO / YSZ (JIN H G etc. Energy Fuels, 1998, 12 (6)) have better overall performance, but there are limited oxygen loading rates and cyclic reactions low resistance, inability to withstand high reaction temperature, low dispersion of metal oxides in oxygen carriers, etc.

Method used

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  • Chemical looping combustion double perovskite type oxide oxygen carrier and preparation method and application thereof
  • Chemical looping combustion double perovskite type oxide oxygen carrier and preparation method and application thereof
  • Chemical looping combustion double perovskite type oxide oxygen carrier and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0018] Take 16g Fe(NO 3 ) 3 9H 2 O, 11.5gNi(NO 3 ) 2 ·6H 2 Put O into a 500mL beaker, where the molar ratio of Fe to Ni is 1 / 1, add 100mL of distilled water, then place the beaker in a water bath at 80°C, stir at 400rpm, and stir until completely dissolved. Take 34.3g La(NO 3 ) 3 ·6H 2 O, put it in a beaker with 100mL distilled water, stir until it is completely dissolved. Then add the lanthanum nitrate solution dropwise into the mixed solution of ferric nitrate and nickel nitrate, and stir while adding dropwise. Take 40g of citric acid, the molar ratio of citric acid to the total amount of metal ions is 1.2:1, put it into a 100mL beaker and stir until it is completely dissolved. After the above mixed solution is stirred for 30 minutes, slowly add the citric acid solution, while adding While stirring. After stirring for 5 hours, the brown solution had been dehydrated and turned into a viscous gel. The gel was taken out and placed in a drying oven at 110° C. to dry ov...

Embodiment 2

[0020] Take 16g Fe(NO 3 ) 3 9H 2 O, 11.5gNi(NO 3 ) 2 ·6H 2 Put O into a 500mL beaker, where the molar ratio of Fe to Ni is 1 / 1, add 100mL of distilled water, then place the beaker in a water bath at 80°C, stir at 400rpm, and stir until completely dissolved. Take 34.3g La(NO 3 ) 3 ·6H 2O, put it in a beaker with 100mL distilled water, stir until it is completely dissolved. Then add the lanthanum nitrate solution dropwise into the mixed solution of ferric nitrate and nickel nitrate, and stir while adding dropwise. Take 67g of citric acid, the molar ratio of citric acid to the total amount of metal ions is 1.2:1, put it into a 100mL beaker and stir until it is completely dissolved. After the above mixed solution is stirred for 30 minutes, slowly add the citric acid solution, while adding While stirring. After stirring for 5 hours, the brown solution had been dehydrated and turned into a viscous gel. The gel was taken out and placed in a drying oven at 110° C. to dry ove...

Embodiment 3

[0022] Take 16g Fe(NO 3 ) 3 9H 2 O, 11.5gNi(NO 3 ) 2 ·6H 2 Put O into a 500mL beaker, where the molar ratio of Fe to Ni is 1 / 1, add 100mL of distilled water, then place the beaker in a water bath at 80°C, stir at 400rpm, and stir until completely dissolved. Take 34.3g La(NO 3 ) 3 ·6H2O, put into a beaker with 100mL distilled water, stir until completely dissolved. Then add the lanthanum nitrate solution dropwise into the mixed solution of ferric nitrate and nickel nitrate, and stir while adding dropwise. Take 100g of citric acid, the molar ratio of citric acid to the total amount of metal ions is 3:1, put it into a 100mL beaker and stir until completely dissolved, after stirring the above mixed solution for 30 minutes, slowly add the citric acid solution, dropwise While stirring. After stirring for 5 hours, the brown solution had been dehydrated and turned into a viscous gel. The gel was taken out and placed in a drying oven at 110° C. to dry overnight. Then take out...

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Abstract

The invention discloses a chemical looping combustion double perovskite type oxide oxygen carrier and a preparation method and application thereof. The oxygen carrier is a composite metal oxide with a double perovskite structure; and the general formula of the composite metal oxide is A2B'B''O6, wherein A is rare earth metal lanthanum, B' is transition metal nickel, and B'' is transition metal iron. In the application of the oxygen carrier in a chemical looping combustion technology, the temperature of the oxygen carrier in an air reactor is 500-1,000 DEG C; and the temperature of the oxygen carrier in a combustion reactor is 500-1,000 DEG C. The preparation method of the oxygen carrier comprises the following steps of: taking iron nitrate, nickel nitrate and lanthanum nitrate as precursors; taking citric acid as a complexing agent; preparing a solution from the precursors and the complexing agent, and evenly mixing and stirring; carrying out water evaporation while the solution changes into viscous gel from transparent colloidal sol; then, drying; and finally, roasting, wherein the roasted sample is the composite metal oxide with the double perovskite structure. The oxygen carrier disclosed by the invention has high oxygen-carrying rate, high activity and good stability.

Description

technical field [0001] The invention relates to a chemical looping combustion double perovskite oxide oxygen carrier and a preparation method and application thereof, belonging to the catalyst technology in the field of chemical looping combustion. Background technique [0002] With the development of industrial production and the improvement of people's living standards, more and more carbon dioxide is released from the combustion of coal, oil, natural gas and other substances, which has become one of the main reasons for the increasingly serious greenhouse effect. hotspots of world research. From the point of view of thermodynamic performance, the combustion process is the process in which the working medium (energy carrier) loses the most energy in the thermal system. Therefore, the greatest potential to solve the problems of energy utilization and environmental pollution lies in the combustion process. Generate high mass concentrations of CO during combustion 2 or faci...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/83C01B3/02
Inventor 梁皓张舒冬倪向前
Owner CHINA PETROLEUM & CHEM CORP
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