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A kind of oxygen carrier for chemical looping combustion, its preparation method and application

A chemical looping combustion and oxygen carrier technology, which is applied in chemical instruments and methods, chemical/physical processes, physical/chemical process catalysts, etc., can solve the problems of low dispersion of metal oxides and high reaction temperature of chemical chain oxygen carriers , to achieve the effects of lower temperature, high low temperature activity, and strong ion exchange

Active Publication Date: 2018-04-10
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem of high reaction temperature of chemical chain oxygen carrier and low dispersion degree of metal oxide in oxygen carrier in the prior art, the present invention provides a HAp / SiO 2 Co as carrier 2 o 3 / HAp / SiO 2 Oxygen carrier, which has the advantages of high low temperature activity, high dispersion of metal oxides in the oxygen carrier, and good catalytic performance

Method used

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  • A kind of oxygen carrier for chemical looping combustion, its preparation method and application

Examples

Experimental program
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Effect test

Embodiment 1

[0027] Weigh 62g 60~80 mesh SiO 2 , put into a beaker, add 200mL of distilled water, and start stirring. Weigh 29.6gCa(NO 3 ) 2 ﹒ 4H 2 O was dissolved in 125mL of absolute ethanol, 19.8g of diammonium hydrogen phosphate was weighed and dissolved in 75mL of deionized water, the two solutions were mixed, added dropwise to silicon oxide water, and the pH value was adjusted to 9 with ammonia water, and then placed in a water bath at 30°C Stir for 1h, age at 30°C for 24h, then filter with suction, wash with distilled water for 3 times, then dry at 110°C for 24h, and bake at 900°C for 6 hours to obtain the carrier HAp / SiO 2 .

[0028] Weigh the measured amount of cobalt nitrate, dissolve it in an appropriate amount of deionized water, and impregnate the measured amount of HAp / SiO 2 overnight, then dried in a 120°C drying oven for 12h, and calcined in a 900°C muffle furnace for 4h to obtain Co 2 o 3 / HAp / SiO 2 Oxygen carrier, where Co 2 o 3 The mass content is 10%, the mas...

Embodiment 2

[0030] Weigh 62g 60~80 mesh SiO 2 , put into a beaker, add 200mL of distilled water, and start stirring. Weigh 29.6gCa(NO 3 ) 2 ﹒ 4H 2 O was dissolved in 125mL of absolute ethanol, 49.5g of diammonium hydrogen phosphate was weighed and dissolved in 75mL of deionized water, the two solutions were mixed, added dropwise to silicon oxide water, and the pH value was adjusted to 9 with ammonia water, and then placed in a water bath at 30°C Stir for 1h, age at 30°C for 24h, then filter with suction, wash with distilled water for 3 times, then dry at 110°C for 24h, and bake at 900°C for 6 hours to obtain the carrier HAp / SiO 2 .

[0031] Weigh the measured amount of cobalt nitrate, dissolve it in an appropriate amount of deionized water, and impregnate the measured amount of HAp / SiO 2 overnight, then dried in a 120°C drying oven for 12h, and calcined in a 900°C muffle furnace for 4h to obtain Co 2 o 3 / HAp / SiO 2 Oxygen carrier, where Co 2 o 3 The mass content is 10%, the mas...

Embodiment 3

[0033] Weigh 62g 60~80 mesh SiO 2 , put into a beaker, add 200mL of distilled water, and start stirring. Weigh 59.2gCa(NO 3 ) 2 ﹒ 4H 2 O was dissolved in 125mL of absolute ethanol, weighed 19.8g of diammonium hydrogen phosphate and dissolved in 75mL of deionized water, mixed the two solutions, added dropwise to silicon oxide water, adjusted the pH value to 9 with ammonia water, and then placed in a water bath at 30°C Stir for 1h, age at 30°C for 24h, then filter with suction, wash with distilled water for 3 times, then dry at 110°C for 24h, and bake at 900°C for 6 hours to obtain the carrier HAp / SiO 2 .

[0034] Weigh the measured amount of cobalt nitrate, dissolve it in an appropriate amount of deionized water, and impregnate the measured amount of HAp / SiO 2 overnight, then dried in a 120°C drying oven for 12h, and calcined in a 900°C muffle furnace for 4h to obtain Co 2 o 3 / HAp / SiO 2 Oxygen carrier, where Co 2 o 3 The mass content is 20%, the mass content of HAp ...

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Abstract

The invention discloses an oxygen carrier used for chemical looping combustion, and a preparation method and applications thereof. The oxygen carrier comprises 5 to 65% of Co2O3, 5 to 65% of hydroxylapatite, and 30 to 90% of SiO2. According to the preparation method, HAp / SiO2 is taken as a carrier, deposition-precipitation method is adopted, calcium nitrate and diammonium hydrogen phosphate are taken as the precursors of hydroxylapatite, and are added into a SiO2 suspension liquid dropwise so as to obtain the HAp / SiO2 carrier, the HAp / SiO2 carrier is loaded with Co2O3 as an active component so as to obtain the Co2O3 / HAp / SiO2 oxygen carrier. The oxygen carrier can be used for chemical looping combustion, is high in low temperature activity and active component dispersity, is capable of reducing reaction temperature of chemical looping, saving a large amount of energy consumption, and increasing reaction activity.

Description

technical field [0001] The invention relates to an oxygen carrier, in particular to an oxygen carrier of chemical looping combustion technology, which belongs to the catalyst technology in the field of chemical looping combustion. Background technique [0002] carbon dioxide (CO 2 ) is a major greenhouse gas, reducing CO emissions during combustion 2 has become a research hotspot. Thermal power technologies use air as the oxidant, and CO in the generated flue gas 2 Only 10% to 20%, CO 2 Subsequent processing costs are too high to be implemented. High concentrations of CO are produced during combustion 2 or facilitate CO 2 Separated gas phase mixtures such as (CO 2 +H 2 O), while eliminating the generation and emission of other pollutants (such as NOx, SOx and Hg, etc.), is an effective way to choose pure oxygen as the oxidant, which has been generally recognized. However, the production of pure oxygen or enriched oxygen requires a large amount of energy. For power p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10L10/00B01J27/185
CPCB01J27/1853C10L10/00
Inventor 梁皓孙兆松尹泽群张锦桦
Owner CHINA PETROLEUM & CHEM CORP
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