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Applications and preparation of high-activity oxygen carrier in chemical looping circulation hydrogen production

An oxygen carrier and chemical chain technology, applied in the field of chemical chain hydrogen production, can solve the problems of low dispersion of metal oxides, low cycle reactivity, limited oxygen loading rate, etc., to improve anti-sintering ability and simple preparation method , the effect of large hydrogen production

Active Publication Date: 2013-01-09
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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  • Applications and preparation of high-activity oxygen carrier in chemical looping circulation hydrogen production

Examples

Experimental program
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Effect test

Embodiment 1

[0019] Take 49.15g Fe(NO 3 ) 3 ·6H 2 O, put it into a 500mL beaker, add 100mL of distilled water, and then place the beaker in a water bath at 80°C with a stirring speed of 400rpm. 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 cobalt nitrate solution, and stir while adding dropwise. Take 40g of citric acid, 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, and stir while adding it dropwise. After stirring for 5 hours, the 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 the dried perovskite precursor, place it in a muffle furnace, raise the temperature from room temperature to 400 °C at a rate of 3 °C / min, roast at a constant t...

Embodiment 2

[0021] Take 42.79g Fe(NO 3 ) 3 ·6H 2 O, put it into a 500mL beaker, add 100mL of distilled water, and then place the beaker in a water bath at 80°C with a stirring speed of 400rpm. 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 cobalt nitrate solution, and stir while adding dropwise. Take 40g of citric acid, 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, and stir while adding it dropwise. After stirring for 5 hours, the 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 the dried perovskite precursor, place it in a muffle furnace, raise the temperature from room temperature to 400 °C at a rate of 3 °C / min, roast at a constant te...

Embodiment 3

[0023] Take 64.37g Fe (NO 3 ) 3 ·6H 2 O, put it into a 500mL beaker, add 100mL of distilled water, and then place the beaker in a water bath at 80°C with a stirring speed of 400rpm. 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 ferric nitrate solution, and stir while adding dropwise. Take 40g of citric acid, 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, and stir while adding it dropwise. After stirring for 5 hours, the 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 the dried perovskite precursor, place it in a muffle furnace, raise the temperature from room temperature to 400 °C at a rate of 3 °C / min, roast at a constant ...

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Abstract

The invention discloses applications and preparation of a high-activity oxygen carrier in chemical looping circulation hydrogen production. The oxygen carrier is composed of a LaFeO3 composite metallic oxide with a perovskite structure and ferric oxide. According to weight of a final oxygen carrier, the content of the LaFeO3 composite metallic oxide is 50%-95%, and the content of the ferric oxide is 5%-50%. In the applications of the high-activity oxygen carrier in the chemical looping circulation hydrogen production, the reaction temperature of the oxygen carrier in fuel is 600-1200 DEG C, and the reaction temperature of the oxygen carrier in steam is 600-1200 DEG C. The oxygen carrier can be further prepared by using a seeping method or a citric acid complexing one-step method. The oxygen carrier is high in oxygen carrying rate, good in activity stability, resistant to high temperature, high in hydrogen productivity, simple in preparation method and suitable to industrial application.

Description

technical field [0001] The invention relates to the application and preparation method of an oxygen carrier in chemical chain cycle hydrogen production technology, belonging to the field of chemical chain hydrogen production. Background technique [0002] To control CO during coal-fired electricity generation 2 CO2 emissions related to improving power generation efficiency and using other fuels with lower C / H and renewable resources 2 control route compared to coal and other fossil fuels during electricity production for CO 2 Recovery and storage (CCS) is the only effective way to achieve effective CO emission reductions in the short term 2 target, but the three COs to which CCS belongs 2 Emission reduction methods (including pre-combustion, oxy-combustion and post-combustion) and related technologies can achieve CO 2 recovery target, but would result in lower system efficiency and CO 2 The increase in recovery cost makes the CO 2 The popularization and application of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B3/06
CPCY02E60/36
Inventor 梁皓倪向前张舒冬张喜文
Owner CHINA PETROLEUM & CHEM CORP
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