JP2010257916A - 燃料電池用改質装置 - Google Patents
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Abstract
【解決手段】燃料電池用改質装置10は、原燃料を改質して水素を主成分とする改質ガスを生成する改質部30と、改質部30で生成した改質ガスのCO濃度をシフト反応により低減するCO変成部60と、CO変成部60によりCO濃度が低減された改質ガスのCO濃度を選択酸化触媒を用いてさらに低減するCO除去部70と、CO除去部70の上流側のガス流路に接続された空気供給用流路102を経由してガス流路に空気を導入可能な構成を備える。改質部30への原燃料の供給を停止した後、CO除去部70の上流側のガス流路に空気が導入される。
【選択図】図2
Description
空気極:1/2O2+2H++2e−→H2O・・・・(2)
実用的には、固体高分子形燃料電池の燃料となる水素は、比較的容易かつ安価に入手可能な天然ガス、ナフサ等の炭化水素系ガスまたはメタノール等のアルコール類の原燃料ガスと水蒸気とを混合して、改質部で改質することで得る手法が採用されている。改質により得られた水素ガスは燃料電池の燃料極に供給され、発電に用いられる。
燃料電池用改質装置10の起動時には、原燃料供給ポンプ14が駆動されるとともに、開閉弁16が開放され、脱硫部20に原燃料が供給される。原燃料は脱硫部20で脱硫された後、水蒸気とともに改質部30に供給され、改質反応により水素を含む改質ガスが生成される。改質部30で生成した改質ガスは熱交換部50を通過した後、CO変成部60に供給され、改質ガス中のCO濃度がシフト反応により低減される。シフト反応部の出口ガスはCO除去部70に供給される。また、開閉弁106が開放されるとともに、空気供給用ポンプ104を駆動させることにより、選択酸化反応用の空気が拡散部80の上流側のガス流路に供給される。なお、このとき、開閉弁108は閉じられている。また、開閉弁18は開放されており、水素を含む改質ガスが燃料電池12に供給される。燃料電池12への改質ガスの供給が開始された後、開閉弁110が開放されるとともに、空気供給用ポンプ112を駆動させることにより、燃料電池12に空気が供給される。
次に、燃料電池用改質装置10を停止する場合の手順について説明する。燃料電池用改質装置10の停止に際して、まず、原燃料供給ポンプ14の駆動が停止されるとともに、開閉弁16を閉じることにより、燃料電池用改質装置10への原燃料の供給が停止される。これと並行して、改質水供給ポンプ90の駆動が停止され、燃料電池用改質装置10への改質水の供給が停止される。また、バーナー32の燃料用の燃料および空気の供給が停止される。
Claims (6)
- 原燃料を改質して水素を主成分とする改質ガスを生成する改質部と、
前記改質部で生成した改質ガスのCO濃度をシフト反応により低減するCO変成部と、
前記CO変成部によりCO濃度が低減された改質ガスのCO濃度を選択酸化触媒を用いてさらに低減するCO除去部と、
前記CO除去部の上流側のガス流路に接続された空気供給用流路を経由して、前記ガス流路に空気を導入可能な空気供給部と、
を備え、
前記改質部への原燃料の供給を停止した後、前記CO除去部の上流側のガス流路に空気が導入されることを特徴とする燃料電池用改質装置。 - 前記CO変成部から、前記空気供給用流路が接続された箇所までのガス流路の容積が、前記空気供給用流路が接続された箇所から前記CO除去部までのガス流路の容積に比べて小さい請求項1に記載の燃料電池用改質装置。
- 前記CO変成部から、前記空気供給用流路が接続された箇所までのガス流路の容積が、前記空気供給用流路が接続された箇所から前記CO除去部までのガス流路の容積の1/6以下である請求項2に記載の燃料電池用改質装置。
- 前記ガス流路に接続された部分の前記空気供給用流路は、前記CO除去部における選択酸化に用いられる空気を供給するための経路を兼ねている請求項1乃至3のいずれか1項に記載の燃料電池用改質装置。
- 前記空気供給用流路が接続された箇所に対して下流側に位置する前記ガス流路にガスの流れを拡散する拡散部が設けられている請求項4に記載の燃料電池用改質装置。
- 前記空気供給部は、ノーマルオープン型の開閉弁を有する請求項1乃至5のいずれか1項に記載の燃料電池用改質装置。
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JP2009110059A JP5466871B2 (ja) | 2009-04-28 | 2009-04-28 | 燃料電池用改質装置 |
KR1020117028130A KR20120029401A (ko) | 2009-04-28 | 2010-03-05 | 연료 전지용 개질 장치 |
EP10769434.1A EP2426770A4 (en) | 2009-04-28 | 2010-03-05 | REFORMER FOR FUEL CELL |
PCT/JP2010/001570 WO2010125732A1 (ja) | 2009-04-28 | 2010-03-05 | 燃料電池用改質装置 |
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JP4863195B2 (ja) | 2005-09-29 | 2012-01-25 | 三洋電機株式会社 | 燃料電池発電システムおよびその停止方法 |
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JPH10302821A (ja) * | 1997-04-25 | 1998-11-13 | Toshiba Corp | 固体高分子燃料電池用一酸化炭素低減装置及びその運転方法 |
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KR20120029401A (ko) | 2012-03-26 |
EP2426770A4 (en) | 2013-05-29 |
EP2426770A1 (en) | 2012-03-07 |
WO2010125732A1 (ja) | 2010-11-04 |
JP5466871B2 (ja) | 2014-04-09 |
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