JP2000241314A - Gas concentration and recovery equipment - Google Patents
Gas concentration and recovery equipmentInfo
- Publication number
- JP2000241314A JP2000241314A JP11038607A JP3860799A JP2000241314A JP 2000241314 A JP2000241314 A JP 2000241314A JP 11038607 A JP11038607 A JP 11038607A JP 3860799 A JP3860799 A JP 3860799A JP 2000241314 A JP2000241314 A JP 2000241314A
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- JP
- Japan
- Prior art keywords
- gas
- porous glass
- organic
- adsorbed
- heating
- Prior art date
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Abstract
(57)【要約】
【課題】本発明の課題は、熱に安定な多孔質ガラスを用
いたガスの吸着捕集と加熱脱着による回収を組み合わせ
ることにより、分析時のバックグラウンドの安定・低下
と繰り返し使用における定量誤差の低減をはかり、分析
における感度と精度の向上を達成するガス濃縮回収装置
を提供することにある。
【解決手段】本発明は、有機ガスが所定の濃度に吸着さ
れる多孔質ガラス１と、前記多孔質ガラス１を加熱処理
して多孔質ガラス１に吸着された濃縮有機ガスを脱着し
て回収する加熱装置３を具備することを特徴とするもの
である。
(57) [Summary] The object of the present invention is to stabilize and reduce the background at the time of analysis by combining gas adsorption and collection using heat-stable porous glass and recovery by heat desorption. It is an object of the present invention to provide a gas concentration / recovery apparatus which aims to reduce a quantitative error in repeated use and improve sensitivity and accuracy in analysis. The present invention relates to a porous glass 1 in which an organic gas is adsorbed at a predetermined concentration, and a method of heating the porous glass 1 to desorb and collect a concentrated organic gas adsorbed on the porous glass 1. It is characterized by comprising a heating device 3 that performs the heating.
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、大気汚染の原因と
なる希薄な有機ガスを多孔質ガラスに吸着捕集し、多孔
質ガラスの加熱処理から吸着ガスを脱着させることによ
り、有機ガスを濃縮回収するガス濃縮回収装置に関する
ものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for concentrating an organic gas by adsorbing and collecting a dilute organic gas causing air pollution on a porous glass and desorbing the adsorbed gas from a heat treatment of the porous glass. The present invention relates to a gas concentration and recovery device to be recovered.
【０００２】[0002]
【従来の技術】大気汚染の原因となる有機ガスの分析に
おいては、一般に分析対象ガスの濃度が希薄であるた
め、分析操作の前段にこの低濃度分析対象ガスの濃縮回
収処理が必要となる。従来のガス濃縮回収装置において
は、樹脂等の有機系吸着剤に分析対象ガスを吸着させ、
その後に加熱脱着処理により分析対象ガスを高濃度に濃
縮させた濃縮ガスとして回収する装置が最も一般的であ
る。2. Description of the Related Art In the analysis of an organic gas that causes air pollution, the concentration of the gas to be analyzed is generally low, so that a process of concentrating and recovering the low concentration of the gas to be analyzed is required prior to the analysis operation. In a conventional gas concentration and recovery device, the gas to be analyzed is adsorbed on an organic adsorbent such as a resin,
Thereafter, an apparatus for recovering a gas to be analyzed as a concentrated gas obtained by concentrating the gas to be analyzed to a high concentration by a heat desorption treatment is most common.
【０００３】この有機系吸着剤を用いたガス濃縮回収装
置の使用手順とその問題について、ガスクロマトグラフ
等の分析手段を組み合わせたガス分析装置を例として、
以下に簡単に説明する。分析したい場所において、分析
対象の有機ガスを含んだ大気を有機系吸着剤を充填した
捕集管に導入し、有機ガスをこの有機系吸着剤に吸着捕
集する。その後、この捕集管を加熱することにより有機
系吸着剤に吸着されている有機ガスを濃縮ガスとして脱
着させ、この濃縮ガスをガスクロマトグラフ等の分析装
置へ導入する。[0003] The use procedure and problems of the gas concentration and recovery apparatus using the organic adsorbent will be described with reference to a gas analyzer combined with analysis means such as a gas chromatograph.
This will be briefly described below. At the place where analysis is desired, the atmosphere containing the organic gas to be analyzed is introduced into a collection tube filled with an organic adsorbent, and the organic gas is adsorbed and collected by the organic adsorbent. Thereafter, by heating the collection tube, the organic gas adsorbed by the organic adsorbent is desorbed as a concentrated gas, and the concentrated gas is introduced into an analyzer such as a gas chromatograph.
【０００４】この手順において、次のような問題が生じ
る。すなわち、有機系吸着剤を用いているため、加熱処
理において有機系吸着剤自身の分解物や低分子不純物な
どの溶出物によるバックグラウンドの上昇が避けられ
ず、特に有機ガスを分析対象とする高感度な分析には十
分適切でないという問題がある。また一般に吸着剤は加
熱により再生して繰り返し使用されるが、有機系吸着剤
は繰り返される加熱処理によって徐々に収縮するため捕
集管内で充填層の空隙を生じやすく、ガス捕集時におけ
る定量誤差の原因となる等の問題がある。In this procedure, the following problem occurs. That is, since the organic adsorbent is used, the background is inevitably increased due to eluted substances such as decomposed substances of the organic adsorbent itself and low molecular impurities during the heat treatment. There is a problem that it is not sufficiently appropriate for sensitive analysis. Generally, the adsorbent is regenerated by heating and used repeatedly, but the organic adsorbent shrinks gradually due to repeated heat treatment, so that voids in the packed bed are likely to occur in the collection tube, resulting in quantitative errors during gas collection. And other problems.
【０００５】[0005]
【発明が解決しようとする課題】大気汚染有機ガスの分
析には、低濃度の分析対象ガスを濃縮回収する必要があ
る。しかし、上記のように有機系吸着剤を用いたガスの
吸着捕集とこの加熱脱着による回収を組み合わせた従来
のガス濃縮回収装置では、有機系吸着剤自身の熱に対す
る不安定性のため分析における感度と精度の向上に限界
があった。In the analysis of air polluting organic gas, it is necessary to concentrate and recover a low concentration gas to be analyzed. However, as described above, the conventional gas concentration and recovery system that combines the adsorption and collection of gas using an organic adsorbent and the recovery by this thermal desorption has a sensitivity in analysis due to the instability of the organic adsorbent itself against heat. And there was a limit to the improvement of accuracy.
【０００６】本発明は上記の事情に鑑みてなされたもの
で、熱に安定な多孔質ガラスを用いたガスの吸着捕集と
加熱脱着による回収を組み合わせることにより、分析時
のバックグラウンドの安定・低下と繰り返し使用におけ
る定量誤差の低減をはかり、分析における感度と精度の
向上を達成するガス濃縮回収装置を提供することを目的
とする。[0006] The present invention has been made in view of the above-mentioned circumstances, and a combination of adsorption and collection of gas using a heat-stable porous glass and recovery by heat desorption to stabilize the background during analysis. It is an object of the present invention to provide a gas concentration and recovery device that achieves improvement in sensitivity and accuracy in analysis by reducing the amount and reducing quantitative errors in repeated use.
【０００７】[0007]
【課題を解決するための手段】上記目的を達成するため
に本発明のガス濃縮回収装置は、有機ガスが所定の濃度
に吸着される多孔質ガラスと、前記多孔質ガラスを加熱
処理して多孔質ガラスに吸着された濃縮有機ガスを脱着
する加熱手段と、前記加熱手段で多孔質ガラスから脱着
された濃縮有機ガスを回収する回収手段とを具備するこ
とを特徴とするものである。Means for Solving the Problems To achieve the above object, a gas concentration and recovery apparatus of the present invention comprises a porous glass in which an organic gas is adsorbed to a predetermined concentration, and a heat treatment of the porous glass to form a porous glass. A heating means for desorbing the concentrated organic gas adsorbed on the porous glass; and a recovery means for recovering the concentrated organic gas desorbed from the porous glass by the heating means.
【０００８】また本発明は、前記ガス濃縮回収装置にお
いて、多孔質ガラスの加熱温度を多孔質ガラスに吸着さ
れた濃縮有機ガスに固有な温度に制御し、濃縮有機ガス
の成分分離を行う加熱手段を用いることを特徴とするも
のである。The present invention also provides a gas concentration and recovery apparatus, wherein the heating temperature of the porous glass is controlled to a temperature unique to the concentrated organic gas adsorbed on the porous glass to separate the components of the concentrated organic gas. Is used.
【０００９】本発明は、多孔質ガラスを分析対象ガスの
吸着捕集剤として用い、この多孔質ガラスに吸着捕集さ
せた有機ガスを加熱脱着処理によって濃縮回収すること
を特徴とするガス濃縮回収装置である。多孔質ガラスは
５００℃以下では分解・変形せず、３００℃付近で分解
・変形する従来の有機系吸着剤と比較して熱安定性が高
い。このため従来装置と比較して分析時のバックグラウ
ンドの安定・低下と繰り返し使用における定量誤差の低
減がはかれ、上記の課題を解決することができる。The present invention is characterized in that a porous glass is used as an adsorbent and trapping agent for a gas to be analyzed, and the organic gas adsorbed and collected on the porous glass is concentrated and recovered by a heat desorption treatment. Device. Porous glass does not decompose or deform at 500 ° C. or lower, and has higher thermal stability than a conventional organic adsorbent that decomposes and deforms at around 300 ° C. Therefore, the background can be stabilized / reduced at the time of analysis and the quantitative error in repeated use can be reduced as compared with the conventional apparatus, and the above problem can be solved.
【００１０】[0010]
【発明の実施の形態】以下図面を参照して本発明の実施
形態例を詳細に説明する。Embodiments of the present invention will be described below in detail with reference to the drawings.
【００１１】図１は本発明の一実施形態例を示す構成説
明図である。多孔質ガラス１を充填した吸着捕集管２に
所望の場所で所望の時間だけ分析対象有機ガスを含む大
気を通過させ、多孔質ガラス１に対象有機ガスを所定の
濃度に吸着捕集する。その後、この吸着捕集管２を加熱
装置３に取り付けるとともに、吸着捕集管２のガス取り
出しチューブ４を分析に使用する分析測定装置５に接続
する。加熱装置３は温度制御用電子回路６を介してコン
ピュータ７により温度制御される。加熱装置３を所定の
温度に設定加熱して多孔質ガラス１に吸着されている濃
縮有機ガス分子を加熱脱着により濃縮回収し、ガス取り
出しチューブ４を介して分析測定装置５に導入し、この
分析測定装置５で濃縮回収した有機ガスの分析測定を行
う。FIG. 1 is a structural explanatory view showing an embodiment of the present invention. The air containing the organic gas to be analyzed is passed through the adsorption and collection tube 2 filled with the porous glass 1 at a desired place for a desired time, and the target organic gas is adsorbed and collected on the porous glass 1 at a predetermined concentration. Thereafter, the adsorption / collection tube 2 is attached to the heating device 3 and the gas extraction tube 4 of the adsorption / collection tube 2 is connected to an analysis / measurement device 5 used for analysis. The temperature of the heating device 3 is controlled by a computer 7 via a temperature control electronic circuit 6. The heating device 3 is heated to a predetermined temperature, and the concentrated organic gas molecules adsorbed on the porous glass 1 are concentrated and recovered by heating and desorption, and introduced into the analysis and measurement device 5 through the gas take-out tube 4. Analytical measurement of the organic gas concentrated and recovered by the measuring device 5 is performed.
【００１２】加熱装置３による多孔質ガラス１の加熱温
度を多孔質ガラス１に吸着された濃縮有機ガスに固有な
温度に制御することにより、多成分ガスからなる濃縮有
機ガスの成分分離を行うことができる。例えば、多孔質
ガラス１を加熱温度ＴＡまで加熱するとＡ成分ガスのみ
が多孔質ガラス１から脱着され、また、多孔質ガラス１
を加熱温度ＴＢ（ＴＢ＞ＴＡ）まで加熱するとＢ成分ガ
スが多孔質ガラス１から脱着される。By controlling the heating temperature of the porous glass 1 by the heating device 3 to a temperature specific to the concentrated organic gas adsorbed on the porous glass 1, component separation of the concentrated organic gas composed of the multi-component gas is performed. Can be. For example, when the porous glass 1 is heated to the heating temperature TA, only the A component gas is desorbed from the porous glass 1 and the porous glass 1 is heated.
Is heated to the heating temperature TB (TB> TA), the B component gas is desorbed from the porous glass 1.
【００１３】尚、本発明のガス濃縮回収装置は、多孔質
ガラス１、吸着捕集管２、加熱装置３及び温度制御用電
子回路６より構成される。The gas concentration and recovery apparatus of the present invention comprises a porous glass 1, an adsorption and collection tube 2, a heating device 3, and a temperature control electronic circuit 6.
【００１４】[0014]
【実施例】次に、多孔質ガラスを用いたガス濃縮回収装
置の効果を確認するため、例として数ｍｇの多孔質ガラ
スを吸着捕集管に充填し、ガスクロマトグラフ（ＧＣ）
を用いて希薄トルエンガスを分析した結果を、従来の有
機系吸着剤を用いた場合と比較し以下に示す。EXAMPLE Next, in order to confirm the effect of a gas concentration and recovery apparatus using porous glass, for example, several mg of porous glass was filled in an adsorption collection tube, and a gas chromatograph (GC) was used.
The results of analysis of dilute toluene gas using the above method are shown below in comparison with the case where a conventional organic adsorbent is used.
【００１５】窒素ガスを用いて約５ｐｐｍの濃度に希釈
したトルエンのガスを、本発明で用いる多孔質ガラスを
充填した吸着捕集管と参照のため従来装置で用いられて
いる有機系吸着剤を充填した吸着捕集管にそれぞれ約５
ｍｉｎだけ流すことにより両吸着捕集管にガスを吸着採
取した。多孔質ガラスを充填した吸着捕集管を２００℃
で１５分間だけ加熱し、ここで脱着されたガスのＧＣス
ペクトルが図２（ａ）である。参照の有機系吸着剤を充
填した吸着捕集管を２００℃で１５分間だけ加熱し、こ
こで脱着されたガスのＧＣスペクトルが図２（ｂ）であ
る。両者のスペクトルを比較すると、溶出した成分の信
号強度が一致することから、多孔質ガラスは従来の有機
系吸着剤と同等のガス濃縮回収効果を持つことが分か
る。また、多孔質ガラスのスペクトルでは、有機系吸着
剤に観測された不純物等の信号が存在しないことから、
バックグラウンドの安定・低下が図れたことが確認され
る。また多孔質ガラスを充填した吸着捕集管において
は、数回の繰り返し再生の後も有機系吸着剤で確認され
た収縮による吸着捕集管内で充填層の空隙の生成は確認
されず、繰り返し使用における定量誤差の低減をはかれ
ることが分かる。[0015] Toluene gas diluted to a concentration of about 5 ppm with nitrogen gas is adsorbed on an adsorption collection tube filled with porous glass used in the present invention and an organic adsorbent used in a conventional apparatus for reference. Approximately 5
The gas was adsorbed and collected on both adsorption / collection tubes by flowing for min. 200 ° C. for the adsorption collection tube filled with porous glass
For 15 minutes, and the GC spectrum of the desorbed gas is shown in FIG. 2 (a). The adsorption and collection tube filled with the reference organic adsorbent was heated at 200 ° C. for 15 minutes, and the GC spectrum of the gas desorbed here is shown in FIG. 2 (b). Comparing the spectra of the two, the signal intensities of the eluted components match, indicating that the porous glass has the same gas concentration and recovery effect as the conventional organic adsorbent. In addition, in the spectrum of the porous glass, since signals such as impurities observed in the organic adsorbent do not exist,
It is confirmed that the background was stabilized and reduced. In addition, in the adsorption-collecting tube filled with porous glass, even after several repetitions of regeneration, the formation of voids in the packed layer was not confirmed in the adsorption-collecting tube due to the shrinkage observed with the organic adsorbent, and the tube was repeatedly used. It can be seen that the quantitative error can be reduced.
【００１６】このような作用・効果を得るために好適す
る多孔質ガラスの条件は、材質として加熱脱着の際に妨
害となる成分を含んでいないこと、および対象とする有
機分子の占有体積よりも十分大きい孔径を持つことであ
る。孔密度は高いほど好ましい。The conditions of the porous glass suitable for obtaining such an operation and effect are such that the material does not contain a component which hinders the desorption during heating and desorption, and that the volume occupied by the organic molecules to be occupied is smaller than that of the target organic molecule. It must have a sufficiently large pore size. The higher the pore density, the better.
【００１７】[0017]
【発明の効果】以上説明したように、本発明は熱に安定
な多孔質ガラスを用いた有機ガスの吸着捕集とこの加熱
脱着による濃縮回収により、大気汚染有機ガス分析時の
バックグラウンドの安定・低下と繰り返し使用における
定量誤差の低減をはかることができ、分析の精度・感度
の向上を可能とする。As described above, the present invention stabilizes the background during analysis of air pollutant organic gas by adsorption and collection of organic gas using a heat-stable porous glass and concentration and recovery by heat desorption. -It is possible to reduce the quantitative error in the reduction and repeated use, and to improve the accuracy and sensitivity of the analysis.
【００１８】また、本発明はガス分析装置の前段処理の
みならず、大気汚染有機ガスの浄化装置におけるガス捕
集回収装置としての利用も可能である。In addition, the present invention can be used not only as a pretreatment in a gas analyzer, but also as a gas collection and recovery device in an air pollution organic gas purifying device.
【図１】本発明の一実施形態例を示す構成説明図であ
る。FIG. 1 is a configuration explanatory diagram showing an embodiment of the present invention.
【図２】本発明の実施例を説明する図であり、（ａ）は
本発明の多孔質ガラスを用いて濃縮回収したトルエンガ
スのＧＣスペクトルであり、（ｂ）は従来の有機系吸着
剤を用いて濃縮回収したトルエンガスのＧＣスペクトル
である。FIGS. 2A and 2B are diagrams illustrating an example of the present invention. FIG. 2A is a GC spectrum of toluene gas concentrated and recovered using the porous glass of the present invention, and FIG. 2B is a conventional organic adsorbent. 5 is a GC spectrum of toluene gas concentrated and recovered by using FIG.
１ 多孔質ガラス ２ 吸着捕集管 ３ 加熱装置 ４ ガス取り出しチューブ ５ 分析測定装置 ６ 温度制御用電子回路 ７ コンピュータ DESCRIPTION OF SYMBOLS 1 Porous glass 2 Adsorption collection tube 3 Heating device 4 Gas extraction tube 5 Analytical measuring device 6 Electronic circuit for temperature control 7 Computer
───────────────────────────────────────────────────── フロントページの続き (72)発明者 田中 融 東京都新宿区西新宿三丁目19番２号 日本 電信電話株式会社内 (72)発明者 林 孝好 東京都新宿区西新宿三丁目19番２号 日本 電信電話株式会社内 ──────────────────────────────────────────────────続 き Continued on front page (72) Inventor Minoru Tanaka 3-19-2 Nishi-Shinjuku, Shinjuku-ku, Tokyo Japan Telegraph and Telephone Corporation (72) Inventor Takayoshi Hayashi 3-192-1, Nishi-Shinjuku, Shinjuku-ku, Tokyo No. Japan Telegraph and Telephone Corporation
Claims (2)
質ガラスと、 前記多孔質ガラスを加熱処理して多孔質ガラスに吸着さ
れた濃縮有機ガスを脱着する加熱手段と、 前記加熱手段で多孔質ガラスから脱着された濃縮有機ガ
スを回収する回収手段とを具備することを特徴とするガ
ス濃縮回収装置。1. A porous glass in which an organic gas is adsorbed at a predetermined concentration; a heating means for heat-treating the porous glass to desorb the concentrated organic gas adsorbed on the porous glass; A collecting means for collecting the concentrated organic gas desorbed from the porous glass.
て、多孔質ガラスの加熱温度を多孔質ガラスに吸着され
た濃縮有機ガスに固有な温度に制御し、濃縮有機ガスの
成分分離を行う加熱手段を用いることを特徴とするガス
濃縮回収装置。2. The gas concentration and recovery apparatus according to claim 1, wherein the heating temperature of the porous glass is controlled to a temperature specific to the concentrated organic gas adsorbed on the porous glass, and the heating is performed to separate the components of the concentrated organic gas. A gas concentration and recovery device characterized by using means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11038607A JP2000241314A (en) | 1999-02-17 | 1999-02-17 | Gas concentration and recovery equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11038607A JP2000241314A (en) | 1999-02-17 | 1999-02-17 | Gas concentration and recovery equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000241314A true JP2000241314A (en) | 2000-09-08 |
Family
ID=12529966
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11038607A Pending JP2000241314A (en) | 1999-02-17 | 1999-02-17 | Gas concentration and recovery equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000241314A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002025268A1 (en) * | 2000-09-25 | 2002-03-28 | Gl Sciences Incorporated | Method and device for collecting and concentrating specimen |
| US6600558B2 (en) | 2000-08-22 | 2003-07-29 | Nippon Telegraph And Telephone Corporation | Micro-fluidic cell for optical detection of gases and method for producing same |
| JP3497159B2 (en) | 2002-03-07 | 2004-02-16 | ゲルステル システムテクニク ゲーエムベーハー ウント コンパニ カーゲー | Sample handling equipment for chromatographic injection systems |
| CN102323110A (en) * | 2011-08-12 | 2012-01-18 | 袁万德 | Industrial gas on-line sampler |
-
1999
- 1999-02-17 JP JP11038607A patent/JP2000241314A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6600558B2 (en) | 2000-08-22 | 2003-07-29 | Nippon Telegraph And Telephone Corporation | Micro-fluidic cell for optical detection of gases and method for producing same |
| WO2002025268A1 (en) * | 2000-09-25 | 2002-03-28 | Gl Sciences Incorporated | Method and device for collecting and concentrating specimen |
| JP3497159B2 (en) | 2002-03-07 | 2004-02-16 | ゲルステル システムテクニク ゲーエムベーハー ウント コンパニ カーゲー | Sample handling equipment for chromatographic injection systems |
| CN102323110A (en) * | 2011-08-12 | 2012-01-18 | 袁万德 | Industrial gas on-line sampler |
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