[특허]Promoter enhanced chilled ammonia based system and method for removal of CO2 from flue gas stream

Promoter enhanced chilled ammonia based system and method for removal of CO2 from flue gas stream 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	B01D-053/14
출원번호	US-0958816 (2010-12-02)
등록번호	US-8168149 (2012-05-01)
발명자 / 주소	Gal, Eli Bade, Otto Morten Jayaweera, Indira Krishnan, Gopala
출원인 / 주소	ALSTOM Technology Ltd
대리인 / 주소	Vacca, Rita D.
인용정보	피인용 횟수 : 6 인용 특허 : 41

초록 ▼

A method and system for CO2 capture from flue gas uses an absorber vessel in which a flue gas stream containing CO2 is contacted with an ammoniated solution to remove CO2 from the flue gas, and a regenerator vessel in which CO2 is released from the ammoniated solution. Parasitic energy consumption of the system can be reduced by adding to the ammoniated solution a promoter effective to enhance the formation of ammonium bicarbonate within the ammoniated solution. The amount of ammoniated solution recycled from the regenerator vessel to the absorber vessel is less than that which would be required using the ammoniated solution without the promoter for removal of the same amount of CO2 from the flue gas.

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1. A method of reducing power consumed by a system for capturing CO2 from flue gas, the method comprising: contacting in a contacting step a flue gas stream containing CO2 with an ammoniated solution lean in CO2 to provide an ammoniated solution rich in CO2;regenerating in a regenerating step the ammoniated solution rich in CO2 to release CO2 from the ammoniated solution, thereby producing the ammoniated solution lean in CO2;recycling the ammoniated solution lean in CO2 from the regenerating step to the contacting step;adding a promoter to the ammoniated solution lean in CO2, the promoter being effective to enhance the formation of ammonium bicarbonate within the ammoniated solution lean in CO2, thereby increasing the CO2 absorption capacity of the ammoniated solution lean in CO2; andreducing the amount of ammoniated solution lean in CO2 that is recycled from the regenerating step to the contacting step, thereby reducing the power consumed by the system. 2. The method of claim 1 wherein the promoter comprises an amine. 3. The method of claim 2 wherein the amine comprises piperazine. 4. The method of claim 3, wherein the promoter includes 0.2-2.0 molar piperazine. 5. The method of claim 4, wherein the promoter includes 0.4-1.0 molar piperazine. 6. The method of claim 1 wherein the promoter includes an enzyme. 7. A method of capturing CO2 from flue gas using system comprising an absorber vessel in which a flue gas stream containing CO2 is contacted with an ammoniated solution to remove CO2 from the flue gas, and a regenerator vessel in which CO2 is released from the ammoniated solution, the method comprising: adding to the ammoniated solution a promoter effective to enhance the formation of ammonium bicarbonate within the ammoniated solution; andrecycling an amount of the ammoniated solution from the regenerator vessel to the absorber vessel to remove an amount of CO2 from the flue gas, the amount of the ammoniated solution being less than that which would be required to remove the amount of CO2 from the flue gas using the ammoniated solution without the promoter. 8. The method of claim 7 wherein the promoter comprises an amine. 9. The method of claim 8 wherein the amine comprises piperazine. 10. The method of claim 9, wherein the promoter includes 0.2-2.0 molar piperazine. 11. The method of claim 10, wherein the promoter includes 0.4-1.0 molar piperazine. 12. The method of claim 7 wherein the promoter includes an enzyme. 13. The method of claim 7, wherein the absorber vessel is reduced from the physical size required for removal of the amount of CO2 from the flue gas using the ammoniated solution without the promoter. 14. The method of claim 13, wherein the absorber vessel is reduced 50-80% from the physical size required for removal of the amount of CO2 from the flue gas using the ammoniated solution without the promoter.

이 특허에 인용된 특허 (41)

Wood Glenn C. (Houston TX) Mehra Yuv R. (The Woodlands TX), Absorption process without external solvent.
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Hammer, Michael T.; Mengel, Michael L., Flue gas desulfurization process and apparatus for removing nitrogen oxides.
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Khang,Soon Jai; Keener,Timothy, Method for treating flue gas.
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Promoter enhanced chilled ammonia based system and method for removal of CO2 from flue gas stream 원문보기

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Promoter enhanced chilled ammonia based system and method for removal of CO2 from flue gas stream 원문보기

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