Integrated Fischer-Tropsch and power production plant with low CO2 emissions
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F02C-003/22
출원번호
US-0612573
(2003-07-01)
발명자
/ 주소
Sheppard, Richard O.
Yakobson, Dennis L.
출원인 / 주소
Rentech, Inc.
대리인 / 주소
Patent Law Offices of Rick Martin, P.C.
인용정보
피인용 횟수 :
34인용 특허 :
48
초록▼
A plant for producing Fischer-Tropsch liquids and electrical power with greatly reduced emissions of carbon dioxide to the atmosphere is made up of a syngas generator unit, an air separation unit, a Fischer-Tropsch unit, a CO2 removal unit, and a combined cycle electricity generation unit. Each of F
A plant for producing Fischer-Tropsch liquids and electrical power with greatly reduced emissions of carbon dioxide to the atmosphere is made up of a syngas generator unit, an air separation unit, a Fischer-Tropsch unit, a CO2 removal unit, and a combined cycle electricity generation unit. Each of Fischer-Tropsch liquids, carbon dioxide, and electrical power can be recoverable under proper economic conditions. Electrical power is recoverable by the use of a gas turbine fueled by predominantly hydrogen and a steam turbine powered by steam generated by cooling exhaust gases from the gas turbine. Sequestration of CO2 and fueling the gas turbine with hydrogen reduces the amount of greenhouse gases emitted to the atmosphere.
대표청구항▼
1. A process comprising:introducing a carbonaceous raw material, water and oxygen into a syngas generator under syngas forming operating conditions to form a syngas; introducing a portion of the syngas into a Fischer-Tropsch reactor and forming primarily aliphatic hydrocarbons and carbon dioxide; se
1. A process comprising:introducing a carbonaceous raw material, water and oxygen into a syngas generator under syngas forming operating conditions to form a syngas; introducing a portion of the syngas into a Fischer-Tropsch reactor and forming primarily aliphatic hydrocarbons and carbon dioxide; separating liquid hydrocarbons from the carbon dioxide, unconverted carbon monoxide, and hydrogen, which are Fischer-Tropsch tail gases; introducing a portion of the syngas along with water and the Fischer-Tropsch tail gases into a water-gas-shift reactor to produce primarily hydrogen and carbon dioxide; scrubbing the carbon dioxide from gases emitted from the shift reactor using a CO2 scrubber; collecting the carbon dioxide for sale or sequestration; and burning the gases rich in hydrogen from the CO2 scrubber in a gas turbine combustor of a combined cycle plant to drive a generator mechanically coupled to the gas turbine during a production of electricity. 2. The process of claim 1, wherein said syngas forming operating conditions comprise a syngas generator temperature operating from about 2400° F. to about 2700° F.3. The process of claim 1 further comprising desulfurizing the syngas before it enters the Fischer-Tropsch reactor.4. The process of claim 1, wherein the gas turbine produces a stack gas having a low CO2 content.5. The process of claim 1 further comprising a catalyst of unsupported precipitated iron to be used in the Fischer-Tropsch reactor.6. The process of claim 5, wherein the Fischer-Tropsch catalyst is doped with potassium and copper.7. The process of claim 6, wherein the weight ratio of potassium to iron in the catalyst is between about 0.007 and about 0.010.8. The process of claim 6, wherein the weight ratio of copper to iron in the catalyst is between about 0.005 and about 0.015.9. A process comprising:separating oxygen from nitrogen from the air in an air separation unit; introducing a carbonaceous raw material, water and oxygen from the air separation unit into a syngas generator under syngas forming operating conditions to form syngas; introducing a portion of the syngas into a Fischer-Tropsch reactor and forming primarily aliphatic hydrocarbons and carbon dioxide; separating liquid hydrocarbons from the carbon dioxide, unconverted carbon monoxide, and hydrogen of Fischer-Tropsch tail gases; introducing a portion of the syngas along with water and the Fischer-Tropsch tail gases into a water-gas-shift reactor to produce primarily hydrogen and carbon dioxide; scrubbing the carbon dioxide from effluent from the shift reactor using a CO2 scrubber; collecting the carbon dioxide for sale or sequestration; and burning the gases rich in hydrogen from the CO2 scrubber in a gas turbine combustor of a combined cycle plant to drive a generator mechanically coupled to the gas turbine during a production of electricity. 10. The process of claim 9, wherein said syngas forming operating conditions comprise a syngas generator temperature operating from about 2400° F. to about 2700° F.11. The process of claim 9 further comprising desulfurizing the syngas before it enters the Fischer-Tropsch reactor.12. The process of claim 9, wherein the gas turbine produces a stack gas having a low CO2 content.13. The process of claim 9 further comprising a catalyst of unsupported precipitated iron to be used in the Fischer-Tropsch reactor.14. The process of claim 13, wherein the Fischer-Tropsch catalyst is doped with potassium and copper.15. The process of claim 14, wherein the weight ratio of potassium to iron in the catalyst is between about 0.007 and about 0.010.16. The process of claim 14, wherein the weight ratio of potassium to iron in the catalyst is between about 0.005 and about 0.015.17. A process comprising:separating oxygen from nitrogen from the air in an air separation unit; introducing a carbonaceous raw material, water and oxygen from the air separation unit into a syngas generator under syngas forming operating conditions to form syngas; introducing a portion of the syngas into a Fischer-Tropsch reactor having an iron-based catalyst, and forming primarily aliphatic hydrocarbons and carbon dioxide; separating liquid hydrocarbons from the carbon dioxide, unconverted carbon monoxide, and hydrogen, which are Fischer-Tropsch tail gases; introducing a portion of the syngas along with water and the Fischer-Tropsch tail gases into a water-gas-shift reactor to produce primarily hydrogen and carbon dioxide; scrubbing the carbon dioxide from gases emitted from the shift reactor using a CO2 scrubber; collecting the carbon dioxide for sale or sequestration; and burning the gases rich in hydrogen from the CO2 scrubber in a gas turbine combustor of a combined cycle plant to drive a generator mechanically coupled to the gas turbine during a production of electricity. 18. The process of claim 17, wherein said syngas forming operating conditions comprise a syngas generator temperature operating from about 2400° F. to about 2700° F.19. The process of claim 17 further comprising desulfurizing the syngas before it enters the Fischer-Tropsch reactor.20. The process of claim 17, wherein the gas turbine produces a stack gas having a low CO2 content.21. The process of claim 17, wherein the catalyst to be used in the Fischer-Tropsch reactor is unsupported precipitated iron.22. The process of claim 21, wherein the Fischer-Tropsch catalyst is doped with potassium and copper.23. The process of claim 22, wherein the weight ratio of potassium to iron in the catalyst is between about 0.007 and about 0.010.24. The process of claim 22, wherein the weight ratio of copper to iron in the catalyst is between about 0.005 and about 0.015.
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