JP7254908B2 - 多段階炭酸塩鉱物化 - Google Patents
多段階炭酸塩鉱物化 Download PDFInfo
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- JP7254908B2 JP7254908B2 JP2021512972A JP2021512972A JP7254908B2 JP 7254908 B2 JP7254908 B2 JP 7254908B2 JP 2021512972 A JP2021512972 A JP 2021512972A JP 2021512972 A JP2021512972 A JP 2021512972A JP 7254908 B2 JP7254908 B2 JP 7254908B2
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- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 title description 16
- 230000033558 biomineral tissue development Effects 0.000 title description 10
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 180
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 90
- 238000000034 method Methods 0.000 claims description 78
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- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 32
- 229910052749 magnesium Inorganic materials 0.000 claims description 32
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- JLVVSXFLKOJNIY-UHFFFAOYSA-N Magnesium ion Chemical compound [Mg+2] JLVVSXFLKOJNIY-UHFFFAOYSA-N 0.000 claims description 30
- 229910001425 magnesium ion Inorganic materials 0.000 claims description 30
- 239000001569 carbon dioxide Substances 0.000 claims description 29
- HCWCAKKEBCNQJP-UHFFFAOYSA-N magnesium orthosilicate Chemical class [Mg+2].[Mg+2].[O-][Si]([O-])([O-])[O-] HCWCAKKEBCNQJP-UHFFFAOYSA-N 0.000 claims description 27
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 26
- 239000007864 aqueous solution Substances 0.000 claims description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 14
- 239000000377 silicon dioxide Substances 0.000 claims description 13
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 12
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- 239000002253 acid Substances 0.000 claims description 7
- 229910052742 iron Inorganic materials 0.000 claims description 6
- 238000002386 leaching Methods 0.000 claims description 6
- 230000001376 precipitating effect Effects 0.000 claims description 6
- 238000000926 separation method Methods 0.000 claims description 5
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- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical class O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 1
- 125000005624 silicic acid group Chemical group 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 1
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Description
a)水性液と活性化ケイ酸マグネシウム鉱物を含む粒子状固体とを含む水性スラリーを提供するステップ;
b)溶解段階において、CO2含有ガス流を、前記鉱物からマグネシウムを溶解させてマグネシウムイオン濃縮炭酸水性液(magnesium ion enriched carbonated aqueous liquid)とマグネシウム枯渇固体残渣(magnesium depleted solid residue)とを含むスラリーを提供するために、該水性スラリーと第1の圧力で接触させるステップ;および
c)沈殿段階において、ステップb)で溶解したマグネシウムイオンから炭酸マグネシウムを、各段階を先行する段階と比べて低い圧力とする複数連続的段階的減圧により、沈殿させるステップ;
を含む、二酸化炭素の回収、隔離および利用のための統合プロセスであって、
ここで、CO2が各連続的段階的減圧により放出され、相応して段階的に圧縮されて溶解段階にリサイクルされる、統合プロセスを提供する。
-沈殿段階から実質的に純粋なCO2の流れを回収すること。このCO2を溶解段階にリサイクルできるため、排ガスインプット流と比較して、より高濃度のCO2を溶解のために提供する;
-沈殿段階での段階的減圧による、これらの流れの再圧縮における大幅なエネルギーの節約。各段階から放出されるCO2を再圧縮するために必要な全体的エネルギーは、すべてのCO2が、単一段階の減圧を伴う単一の沈殿段階で放出される場合よりも少ない。各段階から放出されたCO2は、全放出CO2の一部のみを構成し、それ自身の圧力から先行する圧縮段階の圧力までのみ圧縮されることができるのであり、放出された全てのCO2を最終的な低圧から溶解段階の圧力まで再圧縮するものではない。したがって、沈殿段階および再圧縮段階の操作圧力は、全体的な再圧縮エネルギーを最小化しながら沈殿を最適化するように選択され得る;および
-段階と段階の間の再圧縮されたCO2流の段階間冷却は、必要とされる再圧縮エネルギーのさらなる削減と、最も好ましいポイントでプロセスに戻すことができる同伴水または水蒸気の回収を提供する。これらのポイントは、プロセス内の温度およびスラリー濃度を最適化するように選択し得る。
図1は、本発明の実施形態を例示するプロセスフローシートを示す。簡略化のため、中間の熱交換機、ポンプ、その他のプロセスユニットは省略されている。そのような中間のユニットは、プロセスのある特定の点で必要となることが、当業者に理解される。
図2は、本発明のさらなる実施形態を例示するプロセスフローシートを示す。簡略化のため、中間の熱交換機、ポンプ、その他のプロセスユニットは省略されている。そのような中間のユニットは、プロセスのある特定の点で必要となることが、当業者に理解される。
図3は、本発明のさらなる実施形態を例示するプロセスフローシートを示す。簡略化のため、中間の熱交換機、ポンプ、その他のプロセスユニットは省略されている。そのような中間のユニットは、プロセスのある特定の点で必要となることが、当業者に理解される。
Claims (13)
- a) 水性液と活性化ケイ酸マグネシウム鉱物を含む粒子状固体とを含む水性スラリーを提供するステップ;
b) 溶解段階において、CO2含有ガス流を、前記鉱物からマグネシウムを溶解させてマグネシウムイオン濃縮炭酸水性液とマグネシウム枯渇固体残渣とを含むスラリーを提供するために、前記水性スラリーと第1の圧力で接触させるステップ;および
c) 沈殿段階において、各段階を先行する段階と比べて低い圧力とする複数連続的段階的減圧によりCO 2 を放出させ、pHを上昇させることにより、ステップb)で溶解したマグネシウムイオンから炭酸マグネシウムを沈殿させるステップ;
を含む、二酸化炭素の回収、隔離および利用のための統合プロセスであって、
ここで、CO2が各連続的段階的減圧により放出され、相応して段階的に圧縮されて溶解段階にリサイクルされる、統合プロセス。 - 前記マグネシウムイオン濃縮炭酸水性液が、大気圧を超える圧力のインプットCO2含有ガス流が供給された1以上の反応器内で、前記活性化ケイ酸マグネシウム鉱物を溶解し、その後、2以上の沈殿段階において、溶解したCO2を液体への圧力の低下を介して除去することにより、液体中のpHシフトを誘発し、それにより前記炭酸マグネシウムを沈殿させることにより生成される、請求項1に記載の統合プロセス。
- 前記マグネシウムイオン濃縮炭酸水性液が、大気圧またはそれを超える圧力のインプットCO2含有ガス流が供給された1以上の反応器内で、前記活性化ケイ酸マグネシウム鉱物を溶解し、その後、2以上の別個の沈殿段階において、溶解したCO2を少なくとも1つの沈殿段階における部分真空または大気圧未満の圧力の印加を介して除去することにより、溶液中のpHシフトを誘発し、それにより前記炭酸マグネシウムを沈殿させることにより生成される、請求項1または2に記載の統合プロセス。
- 前記溶解段階は、溶解反応器内で行われ、前記溶解反応器を出るスラリーは、固体を液体から分離する分離機内で分離プロセスに付され、前記スラリーが前記マグネシウムイオン濃縮炭酸水性液を含むスラリー流と前記マグネシウム枯渇固体残渣を含むスラリー流とに分離される、請求項1~3のいずれか一項に記載の統合プロセス。
- 各溶解段階における圧力が100~20000kPaの範囲内であり、温度が20℃~185℃の範囲内である、請求項1から4のいずれか一項に記載の統合プロセス。
- 任意の段階的減圧から放出されるCO2を含む流れが、圧縮され、任意の先行する段階から放出されるCO2を含む流れとブレンドされ、その後、さらに圧縮されて溶解段階にリサイクルされる、請求項1~5のいずれか一項に記載の統合プロセス。
- 圧縮されたCO2を含む流れが、冷却されてから、任意の先行する段階から放出されるCO2を含む流れとブレンドされ、その後、さらに圧縮されて溶解段階にリサイクルされる、請求項6に記載の統合プロセス。
- 前記冷却により、同伴水蒸気が凝縮される、請求項7に記載の統合プロセス。
- 凝縮された水がプロセスにリサイクルされる、請求項8に記載の統合プロセス。
- 前記マグネシウム枯渇固体残渣を湿式磁気分離プロセスに付して、鉄リッチ部分を抽出する、請求項4に記載の統合プロセス。
- 前記マグネシウム枯渇固体残渣を化学処理に付して、含まれるシリカを精製する、請求項4に記載の統合プロセス。
- 前記化学処理が酸浸出である、請求項11に記載の統合プロセス。
- 請求項1に記載のプロセスを実行するように構成される反応器システムであって、各々が段階的減圧を提供して沈殿した炭酸マグネシウムを回収するように構成された2以上の沈殿反応器を備える、反応器システム。
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