JP2021504504A - 車両排気からの二酸化炭素の液体燃料および燃料添加剤への変換 - Google Patents
車両排気からの二酸化炭素の液体燃料および燃料添加剤への変換 Download PDFInfo
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Abstract
Description
2H+(aq)+2e−→H2(g) (1)
同様に、正帯電アノードで酸化反応が起こり、酸素ガスを発生させ、アノードに電子を供与して、反応(2)に従って回路を完成させる。
2H2O(l)→O2(g)+4H+(aq)+4e− (2)
2つの半反応を組み合わせた場合の全体的な反応により、反応(3)に従って2分子毎の水(H2O)から2分子の水素ガス(H2)および1分子の酸素ガス(O2)が生成される。
2H2O(l)→2H2(g)+O2(g) (3)
水素および水への水の電気分解反応の標準電位は−1.23Vであり、水を分解するために、理想的には1.23ボルトの電位差を必要とすることを意味する。しかし、純水の電気分解は、様々な活性化障壁を克服するために、過電圧の形で過剰なエネルギーを必要とする。過剰なエネルギーがなければ、水の自己イオン化が制限されるため、純水の電気分解は非常にゆっくりと起こるか、またはまったく起こらない。電解槽30の効率は、塩、酸または塩基などの電解質の添加、および電極触媒の使用によって増加され得る。
非化石燃料源からの液体燃料および燃料添加剤の形成は、算術的に実現可能であると確認し得る。具体的には、車両の排気から捕捉したCO2を処理し、それを様々な液体燃料および燃料添加剤に変換するために必要な原材料およびエネルギーを計算することができる。CO2の60%が捕捉され、車両に搭載されて、二酸化炭素収集システム10に送達されるとすると、各車両は燃料サイクルあたり約137キログラム(kg)または3113モルのCO2を供給する。さらに、捕捉したCO2を、CO2のΔfG°が−394.39であり、H2Oのそれが−237.14kJ/molである液体燃料に100%転換すると仮定すると、特定の液体燃料および燃料添加剤への変換に必要なエネルギーが決定され得る。
Claims (15)
- 車両排気からの二酸化炭素を液体燃料および燃料添加剤へ変換するためのシステムであって、
二酸化炭素収集システムと、
外部電源と、
電解槽と、
二酸化炭素変換システムと、
を含み、
前記二酸化炭素収集システムが、車両に搭載された車載二酸化炭素捕捉システムと連動して、車両排気から捕捉したCO2を前記二酸化炭素収集システムの容器に移送し、
前記外部電源が、前記二酸化炭素変換システムおよび前記電解槽の動作に必要なエネルギーを提供し、
前記電解槽が、水供給を水素と酸素とに分離して、水素供給および酸素供給を発生させて、
前記二酸化炭素変換システムが、車両の排気から収集され、前記二酸化炭素収集システムに送達されたCO2と、前記電解槽からの前記水素供給を、電気化学的還元により有用な液体燃料および燃料添加剤に変換する、システム。 - 前記システムが、前記二酸化炭素変換システムによって生成された前記液体燃料および燃料添加剤を様々な比率で組み合わせるか、または前記二酸化炭素変換システムによって生成された前記液体燃料および燃料添加剤のうちの1つ以上と、1つ以上の従来の化石燃料とを様々な比率で組み合わせる1つ以上の混合ユニットを含む、液体燃料混合システムをさらに含む、請求項1に記載のシステム。
- 前記二酸化炭素変換システムの1つ以上の生成物をディーゼル燃料と混合して、高セタン価ディーゼルを生成する、請求項2に記載のシステム。
- 前記二酸化炭素変換システムの1つ以上の生成物をガソリンと混合して、高オクタン価ガソリンを生成する、請求項2に記載のシステム。
- 前記二酸化炭素変換システムからのジメチルエーテルとメタノールとを混合して、中間オクタン価液体燃料を形成する、請求項2に記載のシステム。
- 前記外部電源が、非化石エネルギーを含む、請求項1に記載のシステム。
- 前記二酸化炭素変換システムが触媒を利用して、液体燃料および燃料添加剤へのCO2の前記電気化学的還元を促進する、請求項1に記載のシステム。
- 前記システムが、元の燃料、前記二酸化炭素変換システムによって発生した液体燃料、または両方の混合物を酸化させ、より高いオクタン価またはより高いセタン価を有する生成物にするように構成された酸化反応器をさらに含む、請求項1に記載のシステム。
- 前記酸化反応器が、前記電解槽で発生した前記酸素供給を酸化剤として利用して、前記元の燃料、前記二酸化炭素変換システムによって発生した前記液体燃料および燃料添加剤、または前記両方の混合物を酸化させ、より高いオクタン価またはより高いセタン価を有する生成物にする、請求項8に記載のシステム。
- 前記酸化反応器内の燃料の酸化によって放出される熱エネルギーが、前記外部電源のエネルギー需要を低減するために利用される、請求項8に記載のシステム。
- 前記熱エネルギーが、代替の補助熱の必要性を低減または排除するため、開始のための熱を必要とする反応でのCO2の化学変換のために、前記二酸化炭素変換システムで直接利用される、請求項10に記載のシステム。
- 前記熱エネルギーが、前記外部電源を増強する電力を発生する発電機を動作させるために間接的に利用される、請求項10に記載のシステム。
- 車両排気からの二酸化炭素を液体燃料および燃料添加剤に変換するためのシステムであって、
二酸化炭素収集システムと、
外部電源と、
二酸化炭素変換システムと、
液体燃料混合システムと、
を含み、
前記二酸化炭素収集システムが、車両に搭載された車載二酸化炭素捕捉システムと連動して、車両排気から捕捉したCO2を前記二酸化炭素収集システムの容器に移送し、
前記外部電源が、前記二酸化炭素変換システムの動作に必要なエネルギーを提供し、
前記二酸化炭素変換システムが、車両の排気から収集され、前記二酸化炭素収集に送達されたCO2を、電気化学的還元により有用な液体燃料および燃料添加剤に変換し、
前記二酸化炭素変換システムによって生成された前記液体燃料および燃料添加剤を様々な比率で組み合わせるか、または前記二酸化炭素変換システムによって生成された前記液体燃料および燃料添加剤のうちの1つ以上と、1つ以上の従来の化石燃料とを様々な比率で組み合わせる1つ以上の混合ユニットを含む、前記液体燃料混合システム、を含むシステム。 - 前記外部電源が、現場風力発電機、現場太陽光発電アレイ、または現場水力発電機のうちの1つ以上を含む、請求項13に記載のシステム。
- 前記システムが、元の燃料、前記二酸化炭素変換システムによって発生した液体燃料および燃料添加剤、または両方の混合物を酸化させ、より高いオクタン価もしくはより高いセタン価を有する生成物にするように構成された酸化反応器をさらに含む、請求項13に記載のシステム。
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