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Oxygen carrier, preparation method therefor, and applications thereof

A technology of oxygen carrier and carrier, which is applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, fuel additives, etc. Oxygen rate is limited and other issues, to achieve the effect of improving efficiency and hydrogen production, increasing specific surface area, and rapid and thorough reaction

Active Publication Date: 2013-10-30
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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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Take 1.2 mol of CTABr, dissolve in 0.5mol×L -1 In the sodium hydroxide solution, take 1 mol of Ce(NO 3 ) 3 ·6H 2 O is the source of cerium, and the solution of CTABr and cerium is successively added to the three-neck flask, wherein Ce(NO 3 ) 3 ·6H 2 The molar ratio of O to CTABr was 1.2 / 1, and the pH was adjusted to 12 with NaOH at the same time. Join ready-made Al 2 o 3 Small balls (particle size is about 0.1cm, specific surface area is 300m 2 / g), after continuous stirring for 1 h, it was aged at 90°C for 4 days in a sealed bottle. After filtering, washing with water and ethanol, drying at 90°C for 12 h, and calcining at 900°C for 4 h, the prepared CeO 2 -Al 2 o 3 Medium CeO 2 Accounted for 20%.

[0023] With Ni(NO 3 ) 2 ·6H 2 O is the nickel source, and a certain amount of Ni solution was loaded on CeO by the over-volume impregnation method. 2 -Al 2 o 3 and then dried at room temperature, then dried at 100°C for 8 hours and then fired at 800°C for ...

Embodiment 2

[0025] Take 2mol of CTABr, dissolve in 0.5mol×L -1 In the sodium hydroxide solution, take 1 mol of Ce(NO 3 ) 3 ·6H 2 O is the source of cerium, and the solution of CTABr and cerium is successively added to the three-neck flask, wherein Ce(NO 3 ) 3 ·6H 2 The molar ratio of O to CTABr was 2 / 1, and the pH value was adjusted to 11 with NaOH at the same time. Join ready-made Al 2 o 3 Small balls (particle size is about 0.1cm, specific surface area is 300m 2 / g), after continuous stirring for 8 h, put it into a sealed bottle for aging at 50°C for 2 days. After filtering, washing with water and ethanol, drying at 50°C for 8 h, and calcining at 1000°C for 2 h, the prepared CeO 2 -Al 2 o 3 Medium CeO 2 Accounted for 30%.

[0026] With Ni(NO 3 ) 2 ·6H 2 O is the nickel source, and a certain amount of Ni solution was loaded on CeO by the over-volume impregnation method. 2 -Al 2 o 3 , then dried at room temperature, then dried at 110°C for 16 hours and then fired at 100...

Embodiment 3

[0028] Take 3mol of CTABr, dissolve in 0.5mol×L -1 In the sodium hydroxide solution, take 1 mol of Ce(NO 3 ) 3 ·6H 2 O is the source of cerium, and the solution of CTABr and cerium is successively added to the three-neck flask, wherein Ce(NO 3 ) 3 ·6H 2 The molar ratio of O to CTABr was 3 / 1, and the pH was adjusted to 10 with NaOH at the same time. Join ready-made Al 2 o 3 Small balls (particle size is about 0.15cm, specific surface area is 240m 2 / g), after continuous stirring for 4 h, put it into a sealed bottle for aging at 70°C for 3 days. After filtering, washing with water and ethanol, drying at 70°C for 2h, and calcining at 800°C for 6h, the prepared CeO 2 -Al 2 o 3 Medium CeO 2 Accounted for 40%.

[0029] With Ni(NO 3 ) 2 ·6H 2 O is the nickel source, and a certain amount of Ni solution was loaded on CeO by the over-volume impregnation method. 2 -Al 2 o 3 , then dried at room temperature, then dried at 120°C for 12 hours and then fired at 900°C for 8...

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PUM

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Abstract

The invention discloses an oxygen carrier. The oxygen carrier employs CeO2-Al2O3 as a carrier and NiO as an active component. CeO2 is coated on the surface of Al2O3 in the carrier CeO2-Al2O3. CeO2 weighs 10-50% of the total weight of the carrier, the preference being 20-40%. According to the final weight content of the oxygen carrier, the content of the active component NiO in the oxygen carrier is 1-20%, the preference being 1-10%. The oxygen carrier has a pore size of 10-100 nm. The oxygen carrier is advantaged by mesoporous structure, and small particle size and homodisperse of the active component. The oxygen carrier has advantages of high activity, good stability and the like during chemical looping combustion and hydrogen production.

Description

technical field [0001] The invention relates to an oxygen carrier and its preparation method and application, belonging to the catalyst technology in the field of chemical looping combustion or hydrogen production. Background technique [0002] At present, with the rapid growth of population, the continuous deepening of industrialization and the increasing demand for energy, electricity generation based on fossil fuels not only meets the energy demand, but also brings great environmental hazards. CO emitted 2 lead to atmospheric CO 2 Concentrations are increasing, and the greenhouse effect is increasing, so CO from the combustion of fossil fuels 2 The control and reduction of emissions has been closely watched by the international community. [0003] 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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L10/00B01J23/83C01B3/02
Inventor 梁皓张喜文张舒东
Owner CHINA PETROLEUM & CHEM CORP
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