JP3095494B2 - Carbon dioxide absorbent - Google Patents
Carbon dioxide absorbentInfo
- Publication number
- JP3095494B2 JP3095494B2 JP03327230A JP32723091A JP3095494B2 JP 3095494 B2 JP3095494 B2 JP 3095494B2 JP 03327230 A JP03327230 A JP 03327230A JP 32723091 A JP32723091 A JP 32723091A JP 3095494 B2 JP3095494 B2 JP 3095494B2
- Authority
- JP
- Japan
- Prior art keywords
- carbon dioxide
- gas
- dicarbonate
- absorbent
- absorbed
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02C—CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG]
- Y02C20/00—Capture or disposal of greenhouse gases
- Y02C20/40—Capture or disposal of greenhouse gases of CO2
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/151—Reduction of greenhouse gas [GHG] emissions, e.g. CO2
Landscapes
- Gas Separation By Absorption (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Treating Waste Gases (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、炭酸ガス吸収剤に関す
るものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a carbon dioxide absorbent.
【０００２】[0002]
【従来の技術】炭酸ガス吸収剤としては、主として粘土
鉱物類、アルカリ金属またはアルカリ土類金属の水酸化
物、アミン系化合物が知られている。2. Description of the Related Art As carbon dioxide absorbents, clay minerals, hydroxides of alkali metals or alkaline earth metals and amine compounds are mainly known.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、上記の
炭酸ガス吸収剤にはいずれも難点がある。例えば、粘土
鉱物類は水分の存在によって炭酸ガスの吸収が阻害さ
れ、アルカリ金属またはアルカリ土類金属の水酸化物及
びアミン系化合物は、炭酸ガス吸収後の再生が困難であ
るか、再生可能であっても多量の熱を必要とする。However, each of the above carbon dioxide absorbents has disadvantages. For example, clay minerals inhibit the absorption of carbon dioxide due to the presence of moisture, and hydroxides and amine compounds of alkali metals or alkaline earth metals are difficult to regenerate after carbon dioxide absorption or are renewable. Even if it requires a lot of heat.
【０００４】従って、それぞれ使用する際に制限があ
り、実用上問題がある。[0004] Therefore, there is a limitation in using each of them, and there is a practical problem.
【０００５】[0005]
【課題を解決するための手段】本発明者らは、上記の従
来の炭酸ガス吸収剤が有している問題点を解消し、再生
使用が簡単で、かつ水分の影響を受けない全く新しい炭
酸ガス吸収剤について鋭意検討した結果、ジアルキルジ
カーボネートが炭酸ガス吸収能を有し、上記の目的を達
成できることを見いだし、本発明を完成させるに至っ
た。DISCLOSURE OF THE INVENTION The present inventors have solved the above-mentioned problems of the conventional carbon dioxide gas absorbent and have developed a completely new carbon dioxide absorbent which is easy to recycle and uses without being affected by moisture. As a result of diligent studies on the gas absorbent, they have found that dialkyl dicarbonate has a carbon dioxide gas absorbing ability and can achieve the above object, and have completed the present invention.
【０００６】即ち、本発明は、ジアルキルジカーボネー
トよりなる炭酸ガス吸収剤である。That is, the present invention is a carbon dioxide absorbent comprising a dialkyl dicarbonate.
【０００７】本発明において使用されるジアルキルジカ
ーボネートは、下記一般式で示される化合物である。The dialkyl dicarbonate used in the present invention is a compound represented by the following general formula.
【０００８】[0008]
【化１】 Embedded image
【０００９】（ただし、Ｒ1及びＲ2は、同種または異種
のアルキル基である。）上記式中のアルキル基の炭素数
は特に制限されないが、炭酸ガスの吸収効率を勘案する
と、１〜１０の範囲であることが好ましい。本発明にお
いて好適に使用できるジアルキルジカーボネートを具体
的に例示すれば、例えば、ジメチルジカーボネート、ジ
エチルジカーボネート、メチルエチルジカーボネート、
ジｎ−プロピルジカーボネート、ジイソプロピルジカー
ボネート、エチルイソプロピルジカーボネート、ジｎ−
ブチルジカーボネート、ジｔ−ブチルジカーボネート等
をあげることができる。(However, R 1 and R 2 are the same or different alkyl groups.) The number of carbon atoms of the alkyl group in the above formula is not particularly limited. Is preferably within the range. Specific examples of the dialkyl dicarbonate that can be suitably used in the present invention include, for example, dimethyl dicarbonate, diethyl dicarbonate, methyl ethyl dicarbonate,
Di-n-propyl dicarbonate, diisopropyl dicarbonate, ethyl isopropyl dicarbonate, di-n-
Butyl dicarbonate, di-t-butyl dicarbonate and the like can be mentioned.
【００１０】本発明に用いるジアルキルジカーボネート
は、炭酸ガスの吸収効率の点から液状で使用することが
好ましい。ジアルキルジカーボネートが使用温度で液状
であればそのまま炭酸ガス吸収剤として使用すればよ
く、使用温度で固体のときはジアルキルジカーボネート
を溶解しうる溶媒に溶解して使用することが好ましい。
溶媒に溶解して使用するときは、余りに希薄溶液である
ときは炭酸ガス吸収力が低下するために、一般には濃度
を２０重量％以上とすることが好ましい。The dialkyl dicarbonate used in the present invention is preferably used in liquid form from the viewpoint of carbon dioxide absorption efficiency. If the dialkyl dicarbonate is liquid at the use temperature, it may be used as it is as a carbon dioxide gas absorbent. If the dialkyl dicarbonate is solid at the use temperature, it is preferably used by dissolving it in a solvent capable of dissolving the dialkyl dicarbonate.
When dissolved in a solvent for use, if the solution is too dilute, the concentration of carbon dioxide gas is reduced. Therefore, the concentration is generally preferably 20% by weight or more.
【００１１】本発明の炭酸ガス吸収剤は、炭酸ガスを含
有するガスを接触させることにより容易に炭酸ガスを吸
収する。接触方法としては、ガスの入口と出口とを有す
る容器に炭酸ガス吸収剤を充填してその中にガスを流す
方法、密閉容器内に炭酸ガス吸収剤およびガスを封入し
て吸収させる方法等が例示される。接触温度は、特に制
限されないが、あまり高いとジアルキルジカーボネート
が分解するので、通常、０〜１００℃の範囲から、特
に、使用するジアルキルジカーボネートの融点以上とす
ることによって、ジアルキルジカーボネートを溶媒で希
釈することなく液状とすることができるため、高純度の
ジアルキルジカーボネートを炭酸ガスと接触させること
ができ、炭酸ガスの吸収効率を向上させることができ
る。[0011] The carbon dioxide absorbent of the present invention easily absorbs carbon dioxide by contacting a gas containing carbon dioxide. Examples of the contact method include a method in which a container having a gas inlet and an outlet is filled with a carbon dioxide gas absorbent and the gas flows therein, and a method in which the carbon dioxide gas absorbent and the gas are sealed in a closed container and absorbed. Is exemplified. The contact temperature is not particularly limited, but if it is too high, the dialkyl dicarbonate will be decomposed. The liquid can be made into a liquid without being diluted with the carbon dioxide, so that the high-purity dialkyl dicarbonate can be brought into contact with carbon dioxide, and the carbon dioxide absorption efficiency can be improved.
【００１２】本発明の炭酸ガス吸収剤の再生方法として
は特に限定されないが、炭酸ガスを吸収したジアルキル
ジカーボネートを凝固させる方法、使用するジアルキル
ジカーボネートの融点以上で減圧下で脱気する方法等を
あげることができる。このようにして再生したジアルキ
ルジカーボネートは、そのまま再び炭酸ガス吸収剤とし
て繰り返し使用することができる。The method of regenerating the carbon dioxide absorbent of the present invention is not particularly limited, but includes a method of coagulating dialkyl dicarbonate having absorbed carbon dioxide, a method of degassing at a temperature equal to or higher than the melting point of the dialkyl dicarbonate used and under reduced pressure. Can be given. The dialkyl dicarbonate thus regenerated can be used again as it is as a carbon dioxide absorbent.
【００１３】[0013]
【効果】本発明の炭酸ガス吸収剤は、乾燥状態あるいは
水分の多い状態のいずれでも炭酸ガスを十分に吸収し、
また、容易に再生できるため、繰り返し炭酸ガス吸収剤
として使用することができる。したがって、本発明の炭
酸ガス吸収剤は、化学工業に於ける炭酸ガスの除去ばか
りでなく、例えば、空調用として、また、坑道、人工衛
星、深海艇など閉鎖環境中に蓄積する炭酸ガスの除去等
広い用途に使用できる。The carbon dioxide gas absorbent of the present invention sufficiently absorbs carbon dioxide gas in either a dry state or a high moisture state,
Further, since it can be easily regenerated, it can be repeatedly used as a carbon dioxide gas absorbent. Therefore, the carbon dioxide absorbent of the present invention can be used not only for removing carbon dioxide in the chemical industry, but also for removing, for example, air conditioners and carbon dioxide accumulated in closed environments such as tunnels, artificial satellites, and deep-sea boats. It can be used for a wide range of applications.
【００１４】[0014]
【実施例】以下、実施例を掲げて説明するが、本発明は
これらの実施例に限定されるものではない。EXAMPLES The present invention will be described below with reference to examples, but the present invention is not limited to these examples.
【００１５】実施例１ １０Ｌの容器に３５容量％の炭酸ガスを含む空気を満た
し、これに３０℃で１０００ｇのジｔ−ブチルジカーボ
ネートを入れ、ガスクロマトグラフィーによって炭酸ガ
ス濃度を追跡した。炭酸ガスは２０分後にほとんど検出
されなくなった。また、この容器にガスサンプリングバ
ッグを取り付け、０℃に冷却して炭酸ガスを吸収させた
ジ−ｔ−ブチルジカーボネートを凝固させ、発生するガ
スを集めたところ、炭酸ガスを３．４５Ｌ回収した。Example 1 A 10-liter container was filled with air containing 35% by volume of carbon dioxide gas, and 1000 g of di-tert-butyl dicarbonate was charged at 30 ° C., and the concentration of carbon dioxide gas was monitored by gas chromatography. Carbon dioxide became almost undetectable after 20 minutes. Further, a gas sampling bag was attached to this container, and cooled to 0 ° C. to coagulate di-t-butyl dicarbonate having absorbed carbon dioxide gas, and when the generated gas was collected, 3.45 L of carbon dioxide gas was recovered. .
【００１６】実施例２ ガス導入管を取付けた１Ｌの円筒型容器にジｔ−ブチル
ジカーボネート５００ｇを入れ、３容量％の炭酸ガスを
含む空気を３０℃の温度で１Ｌ／ｍｉｎの速度で１時間
導入した。ガスクロマトグラフィーにより円筒型容器か
ら排出されるガスを分析したところ、炭酸ガスはほとん
ど検出されなかった。また、この容器にガスサンプリン
グバッグを取り付け、０℃に冷却して炭酸ガスを吸収さ
せたジｔ−ブチルジカーボネートを凝固させ、発生する
ガスを集めたところ、炭酸ガスを１．７５Ｌ回収した。Example 2 500 g of di-t-butyl dicarbonate was placed in a 1 L cylindrical vessel equipped with a gas introduction tube, and air containing 3% by volume of carbon dioxide was blown at a temperature of 30 ° C. at a rate of 1 L / min. Time introduced. When the gas discharged from the cylindrical container was analyzed by gas chromatography, almost no carbon dioxide gas was detected. Further, a gas sampling bag was attached to this container, and cooled to 0 ° C. to coagulate di-t-butyl dicarbonate having absorbed carbon dioxide gas, and the generated gas was collected. As a result, 1.75 L of carbon dioxide gas was recovered.
【００１７】実施例３ 実施例１において、ジｔ−ブチルジカーボネートの代わ
りにジメチルジカーボネートを用いた以外は全く同様に
試験したところ、炭酸ガスは４０分後にほとんど検出さ
れなくなった。また、この容器にガスサンプリングバッ
グを取り付け、０℃に冷却して炭酸ガスを吸収させたジ
メチルジカーボネートを凝固させ、発生するガスを集め
たところ、炭酸ガスを３．４０Ｌ回収した。Example 3 A test was conducted in exactly the same manner as in Example 1 except that dimethyl dicarbonate was used instead of di-t-butyl dicarbonate. As a result, carbon dioxide was hardly detected after 40 minutes. Further, a gas sampling bag was attached to this container, and cooled to 0 ° C. to coagulate dimethyl dicarbonate having absorbed carbon dioxide, and the generated gas was collected. As a result, 3.40 L of carbon dioxide was recovered.
【００１８】実施例４ 実施例２において、ジ−ｔ−ブチルジカーボネートの代
わりにジメチルジカーボネートを用いた以外は全く同様
に試験した。ガスクロマトグラフィーにより円筒型容器
から排出されるガスを分析したところ、炭酸ガスはほと
んど検出されなかった。また、この容器にガスサンプリ
ングバッグを取り付け、０℃に冷却して炭酸ガスを吸収
させたジメチルジカーボネートを凝固させ、発生するガ
スを集めたところ、炭酸ガスを１．７０Ｌ回収した。Example 4 The test was carried out in the same manner as in Example 2 except that dimethyl dicarbonate was used in place of di-t-butyl dicarbonate. When the gas discharged from the cylindrical container was analyzed by gas chromatography, almost no carbon dioxide gas was detected. Further, a gas sampling bag was attached to this container, and cooled to 0 ° C. to coagulate dimethyl dicarbonate having absorbed carbon dioxide gas, and the generated gas was collected. As a result, 1.70 L of carbon dioxide gas was recovered.
【００１９】実施例５ 実施例１において、ジｔ−ブチルジカーボネートの代わ
りにジエチルジカーボネートを用いた以外は全く同様に
試験したところ、炭酸ガスは３０分後にほとんど検出さ
れなくなった。また、この容器にガスサンプリングバッ
グを取り付け、０℃に冷却して炭酸ガスを吸収させたジ
エチルジカーボネートを凝固させ、発生するガスを集め
たところ、炭酸ガスを３．４２Ｌ回収した。Example 5 A test was conducted in exactly the same manner as in Example 1 except that diethyl dicarbonate was used in place of di-tert-butyl dicarbonate. As a result, carbon dioxide was hardly detected after 30 minutes. Further, a gas sampling bag was attached to this container, cooled to 0 ° C. to coagulate diethyl dicarbonate having absorbed carbon dioxide gas, and the generated gas was collected. As a result, 3.42 L of carbon dioxide gas was recovered.
【００２０】実施例６ 実施例１において相対湿度１００％の空気を用いた以外
は全く同様に試験したところ、炭酸ガス吸収速度、吸収
ガス量は、実施例１と同様であった。Example 6 A test was conducted in exactly the same manner as in Example 1 except that air having a relative humidity of 100% was used. The rate of carbon dioxide gas absorption and the amount of gas absorbed were the same as in Example 1.
【００２１】実施例７ 実施例１において凝固によって再生したジ−ｔ−ブチル
ジカーボネートを使用して実施例１と同様に試験したと
ころ、炭酸ガス吸収速度、吸収ガス量は再生前と同様で
あった。Example 7 A test was conducted in the same manner as in Example 1 using di-t-butyl dicarbonate regenerated by coagulation in Example 1. The rate of absorption of carbon dioxide gas and the amount of absorbed gas were the same as before regeneration. Was.
【００２２】実施例８ 炭酸ガスを吸収したジｔ−ブチルジカーボネートを１０
ｍｍＨｇの減圧下２５℃で１０分間脱気し再生したもの
を使って実施例１と同様に試験したところ、炭酸ガス吸
収速度、吸収ガス量は再生前と同様であった。Example 8 Di-t-butyl dicarbonate having absorbed carbon dioxide was added to 10
When a test was conducted in the same manner as in Example 1 using a sample which had been degassed at 25 ° C. for 10 minutes and regenerated under reduced pressure of mmHg, the carbon dioxide absorption rate and the amount of absorbed gas were the same as before regeneration.
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) B01D 53/62 B01D 53/14 B01J 19/00 ──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int. Cl. 7 , DB name) B01D 53/62 B01D 53/14 B01J 19/00
Claims (1)
ス吸収剤。1. A carbon dioxide absorbent comprising a dialkyl dicarbonate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03327230A JP3095494B2 (en) | 1991-12-11 | 1991-12-11 | Carbon dioxide absorbent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03327230A JP3095494B2 (en) | 1991-12-11 | 1991-12-11 | Carbon dioxide absorbent |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05154343A JPH05154343A (en) | 1993-06-22 |
| JP3095494B2 true JP3095494B2 (en) | 2000-10-03 |
Family
ID=18196775
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP03327230A Expired - Fee Related JP3095494B2 (en) | 1991-12-11 | 1991-12-11 | Carbon dioxide absorbent |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3095494B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102151457B (en) * | 2011-02-09 | 2013-06-05 | 清华大学 | Decarburization method adopting diethyl carbonate as absorbent |
-
1991
- 1991-12-11 JP JP03327230A patent/JP3095494B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH05154343A (en) | 1993-06-22 |
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