JP2009120900A - High temperature steam electrolysis system and operation method thereof - Google Patents
High temperature steam electrolysis system and operation method thereof Download PDFInfo
- Publication number
- JP2009120900A JP2009120900A JP2007295528A JP2007295528A JP2009120900A JP 2009120900 A JP2009120900 A JP 2009120900A JP 2007295528 A JP2007295528 A JP 2007295528A JP 2007295528 A JP2007295528 A JP 2007295528A JP 2009120900 A JP2009120900 A JP 2009120900A
- Authority
- JP
- Japan
- Prior art keywords
- temperature steam
- temperature
- high temperature
- oxygen
- steam electrolysis
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000005868 electrolysis reaction Methods 0.000 title claims abstract description 49
- 238000000034 method Methods 0.000 title claims abstract description 10
- 239000001301 oxygen Substances 0.000 claims abstract description 47
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 47
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 35
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 33
- 239000001257 hydrogen Substances 0.000 claims abstract description 31
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 31
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 27
- 230000008929 regeneration Effects 0.000 claims abstract description 14
- 238000011069 regeneration method Methods 0.000 claims abstract description 14
- 239000007784 solid electrolyte Substances 0.000 claims abstract description 8
- 238000011017 operating method Methods 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 abstract description 18
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 abstract 1
- 239000008236 heating water Substances 0.000 abstract 1
- -1 oxygen ions Chemical class 0.000 description 10
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- 239000003792 electrolyte Substances 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004517 catalytic hydrocracking Methods 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/36—Hydrogen production from non-carbon containing sources, e.g. by water electrolysis
Landscapes
- Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
Abstract
Description
本発明は、水蒸気を高温で電気分解して水素ガスを製造する高温水蒸気電解システムおよびその運転方法に関する。 The present invention relates to a high-temperature steam electrolysis system for producing hydrogen gas by electrolyzing water vapor at a high temperature and an operation method thereof.
水素は水素化分解、脱硫、アンモニア合成、燃料電池などに用いられるが、水素を製造する方法としては近年、固体電解質を用いて高温で水蒸気を電気分解する方法が注目されている。この高温水蒸気電解法においては、高温水蒸気が水素極で水素分子と酸素イオンに分解後、酸素イオン導電性固体電解質層を経由した酸素イオンが酸素極で酸素分子に変換される。 Hydrogen is used in hydrocracking, desulfurization, ammonia synthesis, fuel cells, and the like. Recently, as a method for producing hydrogen, a method of electrolyzing water vapor at a high temperature using a solid electrolyte has attracted attention. In this high-temperature steam electrolysis method, after high-temperature steam is decomposed into hydrogen molecules and oxygen ions at the hydrogen electrode, oxygen ions passing through the oxygen ion conductive solid electrolyte layer are converted into oxygen molecules at the oxygen electrode.
このような高温水蒸気電解法を実施する装置としては、加熱源で加熱した空気と水蒸気を酸素イオン導電性固体電解質を用いた高温水蒸気電解セルに供給して高温下で電気分解し、高温水蒸気電解セルから取り出される水素富化水蒸気と酸素富化空気の有する熱を回収し、水素富化水蒸気から水素ガスを分離するようにしたものがある（たとえば特許文献１，２参照）。
上述した従来の高温水蒸気電解装置においては、空気と水蒸気を加熱源で加熱した後、高温水蒸気電解セルへ供給するため、空気加熱用の熱交換器と水蒸気加熱用の熱交換器が必要である。また、空気と水蒸気の高温水蒸気電解セルへの供給温度を揃えるためには、空気加熱用の熱交換器と水蒸気加熱用の熱交換器を並列に加熱源で加熱する必要があり、各熱交換器へ高温流体を配分する必要がある。また、空気加熱用の熱交換器と水蒸気加熱用の熱交換器を直列に加熱源で加熱する場合は空気と水蒸気の高温水蒸気電解セル供給温度が異なり、熱応力が発生するという問題がある。 In the conventional high-temperature steam electrolysis apparatus described above, a heat exchanger for heating air and a heat exchanger for heating steam are required to supply air and steam to a high-temperature steam electrolysis cell after heating the air and steam with a heating source. . In addition, in order to align the supply temperature of air and water vapor to the high-temperature steam electrolysis cell, it is necessary to heat the heat exchanger for air heating and the heat exchanger for water vapor heating in parallel with a heating source. It is necessary to distribute hot fluid to the vessel. In addition, when a heat exchanger for air heating and a heat exchanger for steam heating are heated in series by a heating source, there is a problem that the supply temperature of the high-temperature steam electrolysis cell for air and steam is different and thermal stress is generated.
本発明は上述した課題を解決するためになされたものであり、空気加熱用の熱交換器が不要で、空気と水蒸気をほぼ同じ温度で高温水蒸気電解セルへ供給できる高温水蒸気電解システムおよびその運転方法を提供することを目的とする。 The present invention has been made to solve the above-described problems, and does not require a heat exchanger for air heating, and can operate at a high temperature steam electrolysis system capable of supplying air and water vapor to a high temperature steam electrolysis cell at substantially the same temperature. It aims to provide a method.
上記課題を解決するために、本発明の高温水蒸気電解システムは、酸素イオン導電性固体電解質を備え水蒸気を電気分解して水素分子と酸素分子を生成する高温水蒸気電解セルと、外部から供給される水を前記高温水蒸気電解セルから排出される水素富化水蒸気によって加熱する水素再生熱交換器と、前記加熱された水をさらに加熱して前記高温水蒸気電解セルに供給される水蒸気を生成する高温熱交換器と、外部から前記高温水蒸気電解セルに供給される空気を前記高温水蒸気電解セルから排出される酸素富化空気によって加熱する酸素再生熱交換器とを備えている構成とする。 In order to solve the above problems, a high-temperature steam electrolysis system of the present invention is supplied from the outside with a high-temperature steam electrolysis cell that includes an oxygen ion conductive solid electrolyte and electrolyzes water vapor to generate hydrogen molecules and oxygen molecules. A hydrogen regeneration heat exchanger that heats water with hydrogen-enriched steam discharged from the high-temperature steam electrolysis cell, and high-temperature heat that further heats the heated water to generate steam supplied to the high-temperature steam electrolysis cell It is set as the structure provided with the exchanger and the oxygen regeneration heat exchanger which heats the air supplied to the said high temperature steam electrolysis cell from the outside with the oxygen enriched air discharged | emitted from the said high temperature steam electrolysis cell.
本発明の高温水蒸気電解システムの運転方法は、前記高温水蒸気電解セルを発熱運転し、あるいはさらに、前記高温水蒸気電解セルに供給される水蒸気の温度と加熱空気の温度がほぼ等しくなるように制御し、あるいはさらに、前記水素富化水蒸気の温度を前記水蒸気の温度より高くし、前記酸素富化空気の温度を前記加熱空気の温度より高くする方法とする。 The operation method of the high-temperature steam electrolysis system according to the present invention controls the high-temperature steam electrolysis cell so that the temperature of the steam supplied to the high-temperature steam electrolysis cell is substantially equal to the temperature of the heated air. Alternatively, the temperature of the hydrogen-enriched steam is made higher than the temperature of the steam, and the temperature of the oxygen-enriched air is made higher than the temperature of the heated air.
本発明によれば、空気加熱用の熱交換器が不要で、空気と水蒸気をほぼ同じ温度で高温水蒸気電解セルへ供給できる高温水蒸気電解システムおよびその運転方法を提供することができる。 ADVANTAGE OF THE INVENTION According to this invention, the heat exchanger for an air heating is unnecessary, and the high temperature steam electrolysis system which can supply air and water vapor | steam to a high temperature steam electrolysis cell at the substantially same temperature, and its operating method can be provided.
以下、本発明に係る高温水蒸気電解システムおよびその運転方法の実施の形態について、図１を参照して説明する。 Hereinafter, an embodiment of a high-temperature steam electrolysis system and an operation method thereof according to the present invention will be described with reference to FIG.
本実施の形態の高温水蒸気電解システムは、高温水蒸気電解セル１と高温熱交換器２と加熱源３と水素再生熱交換器４と酸素再生熱交換器５とから構成されている。高温水蒸気電解セル１は、ＺｒＯ2とＹ2Ｏ3，ＣａＯ，ＭｇＯ等からなる酸素イオン導電性固体電解質層１４と、その両側面に設けられた水素極室８および酸素極室９とから成っている。
The high temperature steam electrolysis system of the present embodiment is composed of a high temperature steam electrolysis cell 1, a high
このように構成された本実施の形態の高温水蒸気電解システムにおいては、外部から供給される水６が水素再生熱交換器４で高温水蒸気電解セル１から排出された水素富化水蒸気７と熱交換して加熱された後、高温熱交換器２で加熱源３との間を循環する熱媒体と熱交換してさらに加熱され水蒸気１２となって、高温水蒸気電解セル１の水素極室８へ供給され、水素極電解反応
２Ｈ2Ｏ＋４ｅ-→２Ｈ2＋２Ｏ2- （１）
により水素分子と酸素イオンに分解される。発生した酸素イオンは電解質層１４を通って酸素極室９へ移動する。その結果、水素極室８からは水素富化水蒸気７が排出される。
In the high-temperature steam electrolysis system of the present embodiment configured as described above, water 6 supplied from the outside exchanges heat with the hydrogen-enriched steam 7 discharged from the high-temperature steam electrolysis cell 1 by the hydrogen regeneration heat exchanger 4. After being heated, the high
Is decomposed into hydrogen molecules and oxygen ions. The generated oxygen ions move to the oxygen electrode chamber 9 through the
一方、外部から供給される空気１０は酸素再生熱交換器５で酸素富化空気１１と熱交換し加熱されて、酸素極室９へ供給される。酸素極室９では、電解質層１４を通ってきた酸素イオンが酸素極電解反応
２Ｏ2-→Ｏ2＋４ｅ- （２）
により、酸素分子と電子に解離される。その結果、酸素極室９からは酸素富化空気１１が排出される。また、電子は外部回路により水素極室８へ移動する。
On the other hand, the air 10 supplied from the outside is heated by exchanging heat with the oxygen-enriched air 11 in the oxygen regeneration heat exchanger 5 and supplied to the oxygen electrode chamber 9. In the oxygen electrode chamber 9, oxygen ions that have passed through the
Is dissociated into oxygen molecules and electrons. As a result, oxygen-enriched air 11 is discharged from the oxygen electrode chamber 9. Electrons move to the
上記過程において、高温水蒸気電解セル１を発熱条件で運転し、水蒸気１２の温度より水素富化水蒸気７の温度を高くする。同様に、加熱空気１３の温度より酸素富化空気１１の温度を高くする。さらに、水蒸気１２の温度と加熱空気１３の温度が等しくなるように空気１０の流量を調整する。 In the above process, the high-temperature steam electrolysis cell 1 is operated under an exothermic condition, and the temperature of the hydrogen-enriched steam 7 is made higher than the temperature of the steam 12. Similarly, the temperature of the oxygen-enriched air 11 is made higher than the temperature of the heated air 13. Further, the flow rate of the air 10 is adjusted so that the temperature of the water vapor 12 and the temperature of the heated air 13 are equal.
本実施の形態によれば、酸素再生熱交換器５には酸素極電解反応（２）による酸素極室９からの質量流量が増大し、高温水蒸気電解セル１のジュール熱で加熱された酸素富化空気１１が供給されるので、加熱源との熱交換による空気１０の加熱が不要である。 According to the present embodiment, the oxygen regeneration heat exchanger 5 has an increased mass flow rate from the oxygen electrode chamber 9 due to the oxygen electrode electrolysis reaction (2), and oxygen enrichment heated by the Joule heat of the high-temperature steam electrolysis cell 1. Since the converted air 11 is supplied, it is not necessary to heat the air 10 by heat exchange with the heating source.
なお、上記説明では水蒸気１２を水素極室８へ供給したが、水蒸気１２に少量の水素を含有させてもよい。また、空気１０の代わりに水を供給して酸素再生熱交換器５において水蒸気を生成し、その水蒸気を酸素極室９へ供給するようにしてもよい。さらに、空気１０に少量の酸素を加えてもよい。
In the above description, the water vapor 12 is supplied to the
１…高温水蒸気電解セル、２…高温熱交換器、３…加熱源、４…水素再生熱交換器、５…酸素再生熱交換器、６…水、７…水素富化水蒸気、８…水素極室、９…酸素極室、１０…空気、１１…酸素富化空気、１２…水蒸気、１３…加熱空気、１４…酸素イオン導電性固体電解質層。 DESCRIPTION OF SYMBOLS 1 ... High temperature steam electrolysis cell, 2 ... High temperature heat exchanger, 3 ... Heat source, 4 ... Hydrogen regeneration heat exchanger, 5 ... Oxygen regeneration heat exchanger, 6 ... Water, 7 ... Hydrogen enriched steam, 8 ... Hydrogen electrode Chamber, 9 ... oxygen electrode chamber, 10 ... air, 11 ... oxygen-enriched air, 12 ... water vapor, 13 ... heated air, 14 ... oxygen ion conductive solid electrolyte layer.
Claims (4)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2007295528A JP2009120900A (en) | 2007-11-14 | 2007-11-14 | High temperature steam electrolysis system and operation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2007295528A JP2009120900A (en) | 2007-11-14 | 2007-11-14 | High temperature steam electrolysis system and operation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2009120900A true JP2009120900A (en) | 2009-06-04 |
Family
ID=40813369
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2007295528A Pending JP2009120900A (en) | 2007-11-14 | 2007-11-14 | High temperature steam electrolysis system and operation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2009120900A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103668307A (en) * | 2013-12-26 | 2014-03-26 | 王树金 | Hydrogen preparing device through electrolyzing high-temperature water vapor and hydrogen preparing method thereof |
| JP2015513531A (en) * | 2012-02-20 | 2015-05-14 | サーモガス ダイナミクス リミテッドＴｈｅｒｍｏｇａｓ Ｄｙｎａｍｉｃｓ Ｌｉｍｉｔｅｄ | Methods and systems for energy conversion and generation |
| WO2019058579A1 (en) * | 2017-09-20 | 2019-03-28 | Kabushiki Kaisha Toshiba | Fuel cell system and hydrogen producing system |
| CN113278993A (en) * | 2021-07-23 | 2021-08-20 | 北京思伟特新能源科技有限公司 | High-safety fuel cell electrolytic cell system and working method thereof |
| JP7673600B2 (en) | 2021-09-08 | 2025-05-09 | 株式会社デンソー | Steam electrolysis system |
-
2007
- 2007-11-14 JP JP2007295528A patent/JP2009120900A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015513531A (en) * | 2012-02-20 | 2015-05-14 | サーモガス ダイナミクス リミテッドＴｈｅｒｍｏｇａｓ Ｄｙｎａｍｉｃｓ Ｌｉｍｉｔｅｄ | Methods and systems for energy conversion and generation |
| US10208665B2 (en) | 2012-02-20 | 2019-02-19 | Thermogas Dynamics Limited | Methods and systems for energy conversion and generation |
| CN103668307A (en) * | 2013-12-26 | 2014-03-26 | 王树金 | Hydrogen preparing device through electrolyzing high-temperature water vapor and hydrogen preparing method thereof |
| WO2019058579A1 (en) * | 2017-09-20 | 2019-03-28 | Kabushiki Kaisha Toshiba | Fuel cell system and hydrogen producing system |
| CN113278993A (en) * | 2021-07-23 | 2021-08-20 | 北京思伟特新能源科技有限公司 | High-safety fuel cell electrolytic cell system and working method thereof |
| CN113278993B (en) * | 2021-07-23 | 2021-09-17 | 北京思伟特新能源科技有限公司 | High-safety fuel cell electrolytic cell system and working method thereof |
| JP7673600B2 (en) | 2021-09-08 | 2025-05-09 | 株式会社デンソー | Steam electrolysis system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP6584499B2 (en) | Electrolysis method and electrolysis apparatus using recirculating cleaning medium | |
| TWI665162B (en) | A process for producing co from co2 in a solid oxide electrolysis cell | |
| WO2004019430A3 (en) | Hydrogen/oxygen generating system with temperature control | |
| CA2590490A1 (en) | Pulsed electrolysis apparatus and method of using same | |
| CA2590487A1 (en) | Multi-cell dual voltage electrolysis apparatus and method of using same | |
| JP2009120900A (en) | High temperature steam electrolysis system and operation method thereof | |
| JP5121269B2 (en) | Fuel cell device | |
| JP2019507718A (en) | Method of producing carbon monoxide optimized by SOEC | |
| JP2008223107A (en) | System and method for electrolyzing high temperature steam | |
| JP3708924B2 (en) | Chemical hydrogen production method using both heat and electricity | |
| JP2012184507A (en) | Method of operating oxygen-consuming electrode | |
| JP2009001878A (en) | High temperature steam electrolysis method and apparatus | |
| JP5132143B2 (en) | Fuel cell device | |
| US20060275197A1 (en) | Gas phase electrolyzer process for producing hydrogen | |
| JP2008115430A (en) | Apparatus for producing hydrogen and method therefor | |
| JP3839812B2 (en) | Fuel cell combination | |
| JP2006299323A (en) | Water electrolyzer | |
| JP2006151731A (en) | Water decomposition method and apparatus, and water decomposition catalyst | |
| JP5350879B2 (en) | Water electrolysis system | |
| JP4677614B2 (en) | Sulfuric acid electrolysis hydrogen production method and apparatus | |
| JP2009174018A (en) | Hydrogen production device | |
| JP4158468B2 (en) | Fuel cell power generation system | |
| JP2002363782A (en) | Water electrolyzing apparatus | |
| JP2003249255A (en) | Fuel cell system | |
| JPH1064566A (en) | Fuel cell power generator and waste heat recovery method for the same |