JP7659543B2 - 逆流反応器中のco2水素化 - Google Patents
逆流反応器中のco2水素化 Download PDFInfo
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Description
逆流反応器システムにおいて実行することができる反応の例は、逆水性ガスシフト反応である。逆流反応器などのスイング反応器の作動の一般概要として、反応サイクルの再生ステップ又は部分を使用して、反応器に熱を提供することができる。次いで、逆水性ガスシフト反応が、サイクルの変換ステップ又は部分の間に反応器内で起こることが可能であり、逆水性ガスシフト反応は反応器再生ステップの間に提供される熱を消費する。反応器再生の間、燃料、酸化体及び希釈剤は、反応器の再生終端から反応器に導入される。反応器の再生部分の層及び/又はモノリスは熱を吸収することができるが、改質触媒などの逆水性ガスシフト反応のための触媒を典型的に含まない。燃料、酸化体及び希釈剤が再生部分を通過すると、再生部分から燃料及び酸化体へと熱は伝達する。燃焼は即座に起こらないが、その代わりに、燃焼の位置は、反応器の中央部分で起こるように制御される。再生ステップの間、燃料、酸化体及び希釈剤の流れは続き、そして反応器の改質終端への燃焼から生じた熱の追加的な伝達が導かれる。
(1)RWGS:H2+CO2<=>CO+H2O
(2)蒸気改質:CH4+H2O=CO+3H2
逆水性ガスシフト反応又は炭化水素改質などの高温で実行される吸熱反応のために、逆流反応器は、吸熱反応に熱を提供するために適切な反応環境を提供することができる。
以下は、予言的な例である。合成ガス供給物の一般的な工業用途は、メタノール及び/又はジメチルエーテルの形成である。メタノール及び/又はジメチルエーテルへの変換の後、より大きい炭化水素を形成するために様々な合成経路が利用可能である。
実施形態1.逆流反応器中で反応を実行する方法であって、逆流反応器内の燃焼領域において、燃焼条件下、燃料、0.1体積%以上のO2及び希釈剤を含む燃料混合物を反応させ、燃焼ガスを形成し、そして触媒組成物を含む変換領域を400℃以上の平均変換領域温度まで加熱すること、並びに5.0体積%~50体積%のCO2、20体積%以上のH2を含み、CO2に対するH2の比率が2.0以上である反応物の流れを、逆水性ガスシフト反応条件下で変換領域において触媒組成物に暴露して、H2O及びCOを含む生成物の流れを形成することを含み、反応領域内の反応物の流れの方向が、燃料混合物の流れの方向に対して逆である、方法。
をさらに含む、上記実施形態のいずれかの方法。
Claims (16)
- 逆流反応器中で反応を実行する方法であって、逆流反応器内の燃焼領域において、燃焼条件下、燃料、0.1体積%以上のO2及び希釈剤を含む燃料混合物を反応させ、燃焼ガスを形成し、触媒組成物を含む変換領域を400℃以上の平均変換領域温度まで加熱すること、並びに5.0体積%~50体積%のCO2、20体積%以上のH2を含み、CO2に対するH2の比率が2.0以上である反応物の流れを、逆水性ガスシフト反応条件下で前記変換領域において前記触媒組成物に暴露して、H2O及びCOを含む生成物の流れを形成することを含み、反応領域内の前記反応物の流れの方向が、前記燃料混合物の流れの方向に対して逆であり、
前記反応物の流れが0.5体積%~15体積%の改質可能な炭化水素をさらに含み、
前記逆水性ガスシフト反応条件が1.4MPa-g以上の圧力を含む、方法。 - 前記反応物の流れが3.0以上のCO2に対するH2の比率を含むか、又は前記反応物の流れが10体積%以上のCO2を含むか、或いはその組合せである、請求項1に記載の方法。
- 10体積%以上のCO2を含む合成ガス供給物をH2含有流と混合し、前記反応物の流れを形成することをさらに含む、請求項1又は2に記載の方法。
- 前記生成物の流れがH2を含み、且つ前記生成物の流れが2.0以上の合成ガス比率を含む、請求項1~3のいずれか一項に記載の方法。
- 前記変換領域が500℃以上の平均変換領域温度まで加熱されるか、又は前記燃料混合物の反応の終了時のピーク変換領域温度が800℃以上であるか、或いはその組合せである、請求項1~4のいずれか一項に記載の方法。
- 前記反応物の流れの暴露を停止すること;及び
前記暴露後、前記燃焼領域において前記燃料混合物を燃焼条件下で反応させ、前記変換領域を前記平均変換領域温度まで加熱すること
をさらに含む、請求項1~5のいずれか一項に記載の方法。 - 前記改質可能な炭化水素がメタンを任意選択的に含む、請求項1~6のいずれか一項に記載の方法。
- 前記反応物の流れが5.0体積%~50体積%のH2Oをさらに含み、改質可能な炭化水素に対するH2Oの比率が3.0以上である、請求項7に記載の方法。
- 前記生成物の流れが前記改質可能な炭化水素を含み、前記生成物の流れ中の前記改質可能な炭化水素の体積百分率が、暴露ステップ間の前記反応物の流れ中の前記改質可能な炭化水素の体積百分率未満である、請求項7又は8に記載の方法。
- 前記逆水性ガスシフト反応条件が10,000時間-1~50,000時間-1の気体空間速度を含む、請求項1~9のいずれか一項に記載の方法。
- 前記触媒組成物が改質触媒を含む、請求項1~10のいずれか一項に記載の方法。
- 前記触媒組成物が、Ni、Co、Fe、Pd、Rh、Ru、Pt、Ir、Cu、Ag、Au、Zr、Cr、Ti、V、W、Mo、Nb、Mn、Sr、La又はその組合せを含む、請求項11に記載の方法。
- 前記燃料がH2を含む、請求項1~12のいずれか一項に記載の方法。
- 前記反応器が、復熱器部分と、前記変換領域を含む部分とを含む反応器システムを含む、請求項1~13のいずれか一項に記載の方法。
- 前記逆水性ガスシフト反応条件が、平均変換領域温度、及び前記燃料混合物の反応の終了時のピーク変換領域温度の少なくとも1つを含む、請求項1~14のいずれか一項に記載の方法。
- 前記逆水性ガスシフト反応条件が、0MPa-g~10.3MPa-g又は1.4MPa-g~10.3MPa-gの圧力、及び1,000時間-1~50,000時間-1又は10,000時間-1~50,000時間-1の気体空間速度を含む、請求項1~15のいずれか一項に記載の方法。
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| US62/903,214 | 2019-09-20 | ||
| PCT/US2020/026391 WO2021040811A1 (en) | 2019-08-26 | 2020-04-02 | C02 hydrogenation in reverse flow reactors |
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| US20230150823A1 (en) * | 2021-11-16 | 2023-05-18 | Dennis Schuetzle | CO2 hydrogenation catalysts for the commercial production of syngas |
| US12331253B2 (en) | 2022-02-16 | 2025-06-17 | Saudi Arabian Oil Company | Integrated hydrocracking and carbon dioxide hydrogenation to produce oxygenated and hydrocarbon fuels |
| US12570524B2 (en) | 2022-11-02 | 2026-03-10 | ExxonMobil Technology and Engineering Company | Reverse flow reactor with integrated partial oxidation |
| WO2024097735A1 (en) * | 2022-11-02 | 2024-05-10 | ExxonMobil Technology and Engineering Company | Passive temperature control in cyclic flow reactors |
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| JP2010525118A (ja) | 2007-04-27 | 2010-07-22 | サウディ ベーシック インダストリーズ コーポレイション | 二酸化炭素の合成ガスへの接触水素化 |
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