[특허]Systems and methods for actively controlling steam-to-carbon ratio in hydrogen-producing fuel processing systems

Systems and methods for actively controlling steam-to-carbon ratio in hydrogen-producing fuel processing systems 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	F01N-003/20 B01J-008/00 B01J-007/00 H01M-008/06 H01M-008/04 C01B-003/38
출원번호	US-0028044 (2011-02-15)
등록번호	US-8920732 (2014-12-30)
발명자 / 주소	Chen, Zhen Ouyang, Xun
출원인 / 주소	DCNS
대리인 / 주소	Dascenzo Intellectual Property Law, P.C.
인용정보	피인용 횟수 : 0 인용 특허 : 67

초록 ▼

The present disclosure is directed to systems and methods for actively controlling the steam-to-carbon ratio in hydrogen-producing fuel processing systems that include a feedstock delivery system. The feedstock delivery system supplies a combined feedstock stream including steam and carbon-containing feedstock to a hydrogen-producing region, which produces a mixed gas stream including hydrogen gas as a majority component therefrom. The systems and methods may include measuring a thermodynamic property of a steam stream, a carbon-containing feedstock stream, and/or the combined feedstock stream and controlling the flow rate and/or pressure of a water stream, the steam stream, and/or the carbon-containing feedstock stream based on a desired steam-to-carbon ratio in the combined feedstock stream and/or a desired flow rate of the mixed gas stream and may include feedforward and/or feedback control strategies.

대표청구항 ▼

1. A method of controlling the operation of a hydrogen-producing fuel processing system that includes a reactant delivery system, the method comprising: providing a carbon-containing feedstock stream from a carbon-containing feedstock source;supplying a steam stream from a steam source;combining the carbon-containing feedstock stream and the steam stream to produce a combined feedstock stream;measuring a temperature of the steam stream, a temperature of the carbon-containing feedstock stream, and a temperature of the combined feedstock stream;controlling a steam-to-carbon ratio within the combined feedstock stream, wherein the Controlling includes controlling based at least in part on the temperature of the steam stream, and at least in part on the temperature of the carbon-containing feedstock stream, and at least in part on the temperature of the combined feedstock stream; andapplying the combined feedstock stream to a hydrogen-producing region of the hydrogen-producing fuel processing system to produce a mixed gas stream that includes hydrogen gas as a majority component. 2. The method of claim 1, wherein the method further includes calculating the steam-to-carbon ratio in the combined feedstock stream from the temperature of the steam stream, the temperature of the carbon-containing feedstock stream, and the temperature of the combined feedstock stream, and further wherein the controlling includes controlling the steam-to-carbon ratio to a desired steam-to-carbon ratio. 3. The method of claim 2, wherein calculating the steam-to-carbon ratio in the combined feedstock stream includes calculating the steam-to-carbon ratio utilizing the formula: SC=[aCCF2⁢(TCF2-TCCF2)+bCCF⁡(TCF-TCCF)][aS2⁢(TS2-TCF2)+bS⁡(TS-TCF)]⁢x. 4. The method of claim 1, wherein the controlling includes controlling at least one of a flow rate of the carbon-containing feedstock stream and a flow rate of the steam stream. 5. The method of claim 4, wherein the controlling includes a feedforward portion, and further wherein the method includes controlling the flow rate of the carbon-containing feedstock stream and the flow rate of the steam stream based at least in part on the desired steam-to-carbon ratio and a desired flow rate of the mixed gas stream from the hydrogen-producing region. 6. The method of claim 4, wherein the controlling further includes a feedback portion, and further wherein the method includes adjusting at least one of the flow rate of the carbon-containing feedstock stream and the flow rate of the steam stream based at least in part on a comparison of a calculated steam-to-carbon ratio to a desired steam-to-carbon ratio. 7. The method of claim 1, wherein the carbon-containing feedstock includes at least one of methane, propane, and natural gas. 8. The method of claim 1, wherein the combining includes combining the steam stream and the carbon-containing feedstock stream within a mixing device. 9. The method of claim 1, wherein the combining is at least substantially isenthalpic. 10. The method of claim 1, wherein the controlling includes controlling a flow-regulating device, and further wherein the flow-regulating device includes at least one of a pressure regulator, a pump, and a compressor. 11. The method of claim 1, wherein the controlling includes controlling a ratio of the carbon-containing feedstock stream to the steam stream to control the steam-to-carbon ratio in the combined feedstock stream, and further wherein the controlling includes controlling the steam-to-carbon ratio to be between 2:1 and 2.5:1. 12. The method of claim 1, wherein the hydrogen-producing region includes a steam reforming region. 13. The method of claim 1, wherein the method further includes reacting at least a portion of the mixed gas stream with an oxidant stream in a fuel cell stack and producing an electrical output therefrom.

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Systems and methods for actively controlling steam-to-carbon ratio in hydrogen-producing fuel processing systems 원문보기

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Systems and methods for actively controlling steam-to-carbon ratio in hydrogen-producing fuel processing systems 원문보기

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