JP5616787B2 - メタン又は天然ガスの再改質を用いた二酸化炭素のメタノールへの変換 - Google Patents
メタン又は天然ガスの再改質を用いた二酸化炭素のメタノールへの変換 Download PDFInfo
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Description
一の実施態様では、本発明は、単一段階又は多段階で水素及び一酸化炭素の混合物を形成するのに充分な反応条件下で、メタン、水及び二酸化炭素、好適には混合物中で混合し、並びにメタノールを形成するのに充分な反応条件下、水素及び一酸化炭素の混合物を反応させることによってメタノールを製造する方法を提供する。一酸化炭素に対する水素のモル比は、一酸化炭素1モルあたり少なくとも2モルの水素であり、好ましくは2:1〜2.1:1である。メタン、水及び二酸化炭素のモル比は、約3:2:1である。
本発明の特徴及び利益は、以下の実施態様の詳細な説明及び図面を精査することでより明らかになるであろう。
90%の過剰量でメタンとCO2の変換を可能にする、CO2、メタン(又は天然ガス)及び蒸気(水)の適切なモル混合物を、約800℃〜850℃でNiO等の触媒上、流式反応器で単一段階で改質して、一酸化炭素1モルあたり約2.05モルの水素のモル比でガス混合物を製造した。
メタン、CO2及びH2Oの混合物(モル比3:1:2)をナノ構造の高表面ヒュームド・シリカ上に担持されたV2O5/NiOからなる触媒上で反応させて、メタノールの製造に適切な2:1近くの水素/一酸化炭素ガス混合物を得た。
実施例1及び2のように、製造された2:1のモル比に近い水素及び一酸化炭素を銅系触媒を用いた触媒反応条件下で変換して、メタノールを製造した。
実施例3で製造されたメタノールを、100℃〜200℃の範囲でナフィオン(Nafion)H等の固体酸触媒を用いてジメチルエーテルに脱水することができた。
メタノールのジメチルエーテルへの脱水中に形成された水を、CH4及びCO2と2:3:1の全モル比で1段階のBI-REFORMING(登録商標)方法で反応させた。ジメチルエーテルの再利用を用いたかかる水は、全モル比3:1のメタン及びCO2を用いることによって製造された。
1:1のモル比のメタン及び二酸化炭素をフロー方式でヒュームド・シリカ上のNiO/V2O5上で、850℃で乾燥改質して、約1:1のモル比の水素及び一酸化炭素の混合物を得た。
Claims (13)
- メタン源と水から一酸化炭素及び水素を形成するためにメタンの水蒸気改質を行う工程;
メタン源と二酸化炭素から一酸化炭素及び水素を形成するためにメタンの乾燥改質を行う工程;
水素と一酸化炭素のモル比が2:1ないし2.1:1である水素及び一酸化炭素の混合物を製造するために、成分を分離することなく水蒸気改質及び乾燥改質からの一酸化炭素と水素を結合する工程;及び
水素及び一酸化炭素の上記モル比の混合物を、メタノールを専ら形成するのに充分な条件下で転換する工程
を含む二酸化炭素及びメタン源からメタノールを製造する方法。 - 前記水蒸気改質及び乾燥改質の結合が、2つの分離した工程もしくは単一の工程のいずれかで、前記の比率の水素及び一酸化炭素の混合物を供給するために充分な化学量論的な量のメタン、二酸化炭素及び水の存在下で行われる請求項1に記載の方法。
- 前記の比率の水素及び一酸化炭素の混合物を供給するために、メタン、二酸化炭素及び水を単一の結合された再改質工程において、これらを3:1:2の比率で反応させる請求項2に記載の方法。
- 反応物質が、3CH4+2H2O+CO2のとおり、3:1:2のモル比率であるメタン、二酸化炭素及び水のみである、再改質反応を行う工程:
次式のとおり、一酸化炭素及び水素を形成するために、メタン源からのメタンを水で水蒸気改質を行う工程:
2CH4 + 2H2O → 2CO + 6H2 ;
次式のとおり、一酸化炭素及び水素を形成するために、メタン源からのメタンを二酸化炭素で乾燥改質を行う工程:
CH4 + CO2 → 2CO + 2H2 ;
改質反応の成分を分離することなく水蒸気改質及び乾燥改質からの一酸化炭素及び水素からなる流出物を、水素と一酸化炭素のモル比が2:1ないし2.1:1である水素及び一酸化炭素の混合物を製造するために結合する工程;及び
次式のとおり、水素及び一酸化炭素の上記モル比の混合物を、メタノールを専ら形成するのに充分な条件下で転換する工程
4CO + 8H2 → 4CH3OH ;
を含む二酸化炭素、水及びメタン源からメタノールを製造する方法。 - 単一段階で、前記メタン、二酸化炭素及び水が反応する請求項4に記載の方法。
- 前記水素及び一酸化炭素の混合物が、2.05対1のモル比である請求項1〜5のいずれかに記載の方法。
- 前記結合された再改質工程が、800℃〜1100℃の温度で行われる請求項1〜6のいずれかに記載の方法。
- 追加の一酸化炭素を形成するように、前記の製造過程で生成した任意のコークスを二酸化炭素と反応させ、反応により水又は二酸化炭素の副産物を発生することなく、実質的にすべての一酸化炭素がメタノールの製造のために反応し、再改質が有意な量のコークスの生成なしに行われる請求項1〜7のいずれかに記載の方法。
- 前記再改質が、金属及び金属酸化物の混合触媒の存在下で行われる請求項1〜7のいずれかに記載の方法。
- 前記混合触媒が、Ni及びV2O5、Ni2O3及びV2O5、又はNi2V2O7及びNi3V2O8である請求項9に記載の方法。
- 前記混合触媒がシリカ、アルミナ、金属酸化物又は金属を含む高表面又はナノ構造の担体に担持されている請求項9又は10に記載の方法。
- さらに、ジメチルエーテルを形成するための前記メタノールの脱水工程を含む請求項1又は4に記載の方法。
- 前記の工程で用いる前記二酸化炭素が、
(a)石炭又は化石燃料火力発電所;
(b)大量の二酸化炭素を生産する工場;又は
(c)大気
から再利用される請求項1又は4に記載の方法。
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
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US94550107P | 2007-06-21 | 2007-06-21 | |
US60/945,501 | 2007-06-21 | ||
US11/850,501 | 2007-09-05 | ||
US11/850,501 US7906559B2 (en) | 2007-06-21 | 2007-09-05 | Conversion of carbon dioxide to methanol and/or dimethyl ether using bi-reforming of methane or natural gas |
PCT/US2008/067462 WO2008157673A1 (en) | 2007-06-21 | 2008-06-19 | Conversion of carbon dioxide to methanol using bi-reforming of methane or natural gas |
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JP2010530878A JP2010530878A (ja) | 2010-09-16 |
JP5616787B2 true JP5616787B2 (ja) | 2014-10-29 |
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JP2010513405A Active JP5587183B2 (ja) | 2007-06-21 | 2008-06-19 | メタン又は天然ガスの再改質を用いた二酸化炭素のジメチルエーテルへの変換 |
JP2010513402A Expired - Fee Related JP5616787B2 (ja) | 2007-06-21 | 2008-06-19 | メタン又は天然ガスの再改質を用いた二酸化炭素のメタノールへの変換 |
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US (4) | US7906559B2 (ja) |
EP (2) | EP2167451B1 (ja) |
JP (2) | JP5587183B2 (ja) |
KR (2) | KR101579051B1 (ja) |
CN (3) | CN105175225A (ja) |
AU (2) | AU2008265677B2 (ja) |
CA (2) | CA2690836C (ja) |
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