JP4232439B2 - Method for measuring the concentration of inorganic compounds in gas mixtures containing hydrogen chloride - Google Patents
Method for measuring the concentration of inorganic compounds in gas mixtures containing hydrogen chloride Download PDFInfo
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- JP4232439B2 JP4232439B2 JP2002331998A JP2002331998A JP4232439B2 JP 4232439 B2 JP4232439 B2 JP 4232439B2 JP 2002331998 A JP2002331998 A JP 2002331998A JP 2002331998 A JP2002331998 A JP 2002331998A JP 4232439 B2 JP4232439 B2 JP 4232439B2
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Description
【０００１】
【発明の属する技術分野】
本発明は、塩化水素を含有する混合ガス中の無機化合物の濃度を測定する方法に関するものである。更に詳しくは、本発明は、塩化水素を含有する混合ガス中の無機化合物の濃度を測定するに際し、無機化合物の濃度を測定機器の腐食による劣化をさせることなく、かつ簡易な操作で測定することができ、よって測定機器コスト、操作性の観点から極めて有利な塩化水素を含有する混合ガス中の無機化合物の濃度の測定方法に関するものである。
【０００２】
【従来の技術】
燃料の燃焼、金属精錬、化学反応工程などに伴って、煙道、煙突、ダクトなどに排出されるガス中の一酸化炭素を測定する方法としては、該ガスを注射筒または捕集バッグに採取し、ガスクロマトグラフィーで測定する方法（非特許文献１参照。）などが知られている。しかしながら、試料ガス中に多量の塩化水素が含まれる場合は、ガス中の無機化合物の濃度を測定する際、測定機器を腐食による劣化をさせてしまい、測定良好な状態を維持したまま継続的に無機化合物の濃度を測定できないという問題がある。また、塩化水素、臭化水素等のハロゲン化物を含有する混合ガス中に含まれる有機物を測定する方法として、ハロゲン化物を除去した後のガス中の有機物を測定する方法が知られており、ハロゲン化物の除去方法として、冷却による方法が特許文献１に、吸着剤による方法が特許文献２に記載されている。
【０００３】
【特許文献１】
特開２００１−３５６１２０号公報
【特許文献２】
特開２００１−１０８６６７号公報
【非特許文献１】
ＪＩＳ Ｋ ００９８ 日本規格協会発行
【０００４】
【発明が解決しようとする課題】
かかる現状に鑑み、本発明が解決しようとする課題は、塩化水素を含有する混合ガス中の無機化合物の濃度を測定するに際し、無機化合物の濃度を測定機器の腐食による劣化をさせることなく、かつ簡易な操作で測定することができ、よって測定機器コスト、操作性の観点から極めて有利な塩化水素を含有する混合ガス中の無機化合物の濃度の測定方法を提供する点に存するものである。
【０００５】
【課題を解決するための手段】
すなわち、本発明は、下記の第１および第２工程を含むことを特徴とする塩化水素を含有する混合ガス中の無機化合物の濃度の測定方法に係るものである。
第１工程：塩化水素を含有する混合ガス中の塩化水素の濃度を１体積％以下に低減させ、塩化水素の量を測定する工程
第２工程：第１工程で得られた塩化水素の濃度が１体積％以下のガスの量と該ガス中の無機化合物の濃度を測定する工程
【０００６】
【発明の実施の形態】
本発明においては、塩化水素を含有する混合ガス中の塩化水素の濃度を１体積％以下に低減させ、塩化水素の量を測定した後に、得られた塩化水素の濃度が１体積％以下のガスの量と該ガス中の無機化合物の濃度を測定する必要がある。このことにより、塩化水素を含有する混合ガス中の無機化合物の濃度を測定機器の測定良好な状態を維持したまま、かつ簡易な操作で測定することができる。
【０００７】
塩化水素を含有する混合ガスとしては、塩素化合物の熱分解反応や燃焼反応、有機化合物のホスゲン化反応または塩素化反応などにおいて副生したものが良く用いられる。無機化合物としては、一酸化炭素、二酸化炭素、水素、酸素、窒素、ホスゲン、アルゴン、硫化水素、硫化カルボニル、二酸化硫黄、二硫化炭素などがあげられる。
【０００８】
本発明においては、第１工程における塩化水素を含有する混合ガス中の塩化水素の濃度を１体積％以下に低減させる方法は、試料採取操作が終了した時点で該混合ガス中の塩化水素の濃度が１体積％以下に低減させることができれば、水吸収法、吸着剤法などいかなる方法で良い。第１工程で得られたガス中の塩化水素の濃度は、１体積％以下が好ましい。濃度が高すぎる場合は測定機器の腐食による劣化が起こる。第１工程で得られた塩化水素の濃度が１体積％以下のガス中の水分濃度は、測定機器の腐食防止の観点から、１０体積％以下が好ましい。
【０００９】
本発明においては、第２工程における第１工程で得られた塩化水素の濃度が１体積％以下のガスの量の測定は、ガスの量が測定できる方法であれば、ガスメーター法、水上置換法などいかなる方法で良い。第１工程で得られた塩化水素の濃度が１体積％以下のガス中の無機化合物の濃度を測定する方法は、該無機化合物を検知することができ、かつ濃度を測定できるものならば、ガスクロマトグラフィー法、検知管法、赤外線吸収法などいかなる方法で良い。また、第１工程で得られた塩化水素の濃度が１体積％以下のガスを採取する方法としては、ガスが捕集できれば、捕集バッグ法、注射筒法などいかなる方法で良い。
【００１０】
塩化水素を含有する混合ガス中の無機化合物の濃度は、第１工程で除去された塩化水素の量および第１工程で得られた塩化水素の濃度が１体積％以下のガスの量と該ガス中の無機化合物の濃度から求められる。
【００１１】
【発明の効果】
以上説明したとおり、本発明により、塩化水素を含有する混合ガス中の無機化合物の濃度を測定機器の腐食による劣化をさせることなく、かつ簡易な操作で測定することができ、よって測定機器コスト、操作性の観点から極めて有利な塩化水素を含有する混合ガス中の無機化合物の濃度の測定方法を提供することができた。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for measuring the concentration of an inorganic compound in a mixed gas containing hydrogen chloride. More specifically, in the present invention, when measuring the concentration of an inorganic compound in a mixed gas containing hydrogen chloride, the concentration of the inorganic compound is measured by a simple operation without causing deterioration of the measuring instrument due to corrosion. Therefore, the present invention relates to a method for measuring the concentration of an inorganic compound in a mixed gas containing hydrogen chloride, which is extremely advantageous from the viewpoint of measuring equipment cost and operability.
[0002]
[Prior art]
As a method of measuring carbon monoxide in gases discharged into flues, chimneys, ducts, etc. due to fuel combustion, metal refining, chemical reaction processes, etc., the gas is collected in a syringe or collection bag. And the method (refer nonpatent literature 1) etc. which measure by gas chromatography are known. However, if the sample gas contains a large amount of hydrogen chloride, when measuring the concentration of inorganic compounds in the gas, the measurement instrument will be deteriorated due to corrosion, and the measurement will be continued while maintaining good conditions. There is a problem that the concentration of the inorganic compound cannot be measured. In addition, as a method for measuring an organic substance contained in a mixed gas containing a halide such as hydrogen chloride or hydrogen bromide, a method for measuring an organic substance in the gas after removing the halide is known. As a method for removing a compound, Patent Document 1 describes a method using cooling, and Patent Document 2 describes a method using an adsorbent.
[0003]
[Patent Document 1]
JP 2001-356120 A [Patent Document 2]
JP 2001-108667 A [Non-Patent Document 1]
Published by JIS K 0098 Japan Standards Association [0004]
[Problems to be solved by the invention]
In view of the current situation, the problem to be solved by the present invention is to measure the concentration of the inorganic compound in the mixed gas containing hydrogen chloride without causing deterioration of the concentration of the inorganic compound due to corrosion of the measuring instrument, and It is possible to perform measurement with a simple operation, and therefore, it is to provide a method for measuring the concentration of an inorganic compound in a mixed gas containing hydrogen chloride, which is extremely advantageous from the viewpoint of measuring instrument cost and operability.
[0005]
[Means for Solving the Problems]
That is, this invention relates to the measuring method of the density | concentration of the inorganic compound in the mixed gas containing hydrogen chloride characterized by including the following 1st and 2nd processes.
First step: A step of measuring the amount of hydrogen chloride by reducing the concentration of hydrogen chloride in the mixed gas containing hydrogen chloride to 1% by volume or less. Second step: The concentration of hydrogen chloride obtained in the first step is A step of measuring the amount of gas of 1% by volume or less and the concentration of the inorganic compound in the gas.
DETAILED DESCRIPTION OF THE INVENTION
In the present invention, after reducing the concentration of hydrogen chloride in the mixed gas containing hydrogen chloride to 1% by volume or less and measuring the amount of hydrogen chloride, the obtained gas having a hydrogen chloride concentration of 1% by volume or less is obtained. And the concentration of the inorganic compound in the gas must be measured. Thus, the concentration of the inorganic compound in the mixed gas containing hydrogen chloride can be measured with a simple operation while maintaining a good measurement state of the measuring instrument.
[0007]
As a mixed gas containing hydrogen chloride, a gas by-produced in a pyrolysis reaction or combustion reaction of a chlorine compound, a phosgenation reaction or a chlorination reaction of an organic compound is often used. Examples of the inorganic compound include carbon monoxide, carbon dioxide, hydrogen, oxygen, nitrogen, phosgene, argon, hydrogen sulfide, carbonyl sulfide, sulfur dioxide, and carbon disulfide.
[0008]
In the present invention, the method of reducing the concentration of hydrogen chloride in the mixed gas containing hydrogen chloride to 1% by volume or less in the first step is the concentration of hydrogen chloride in the mixed gas when the sampling operation is completed. Can be reduced to 1% by volume or less, any method such as a water absorption method or an adsorbent method may be used. The concentration of hydrogen chloride in the gas obtained in the first step is preferably 1% by volume or less. If the concentration is too high, the measuring instrument will deteriorate due to corrosion. The water concentration in the gas having a hydrogen chloride concentration of 1% by volume or less obtained in the first step is preferably 10% by volume or less from the viewpoint of preventing corrosion of the measuring instrument.
[0009]
In the present invention, the measurement of the amount of gas having a hydrogen chloride concentration of 1% by volume or less obtained in the first step in the second step is a gas meter method or a water replacement method as long as the amount of gas can be measured. Any method is good. The method of measuring the concentration of the inorganic compound in the gas having a hydrogen chloride concentration of 1% by volume or less obtained in the first step is a gas that can detect the inorganic compound and measure the concentration. Any method such as a chromatography method, a detector tube method, or an infrared absorption method may be used. Moreover, as a method for collecting the gas having a hydrogen chloride concentration of 1% by volume or less obtained in the first step, any method such as a collection bag method or a syringe method may be used as long as the gas can be collected.
[0010]
The concentration of the inorganic compound in the mixed gas containing hydrogen chloride includes the amount of hydrogen chloride removed in the first step, the amount of gas having a hydrogen chloride concentration obtained in the first step of 1% by volume or less, and the gas. It is calculated | required from the density | concentration of an inorganic compound in it.
[0011]
【The invention's effect】
As described above, according to the present invention, the concentration of the inorganic compound in the mixed gas containing hydrogen chloride can be measured by simple operation without causing deterioration due to corrosion of the measuring instrument, and thus the measuring instrument cost, It was possible to provide a method for measuring the concentration of an inorganic compound in a mixed gas containing hydrogen chloride, which is extremely advantageous from the viewpoint of operability.
Claims (1)
第１工程：塩化水素を含有する混合ガス中の塩化水素を水に吸収させることにより、塩化水素の濃度を１体積％以下に低減させたガスを得るとともに、除去された塩化水素の量を測定する工程
第２工程：第１工程で得られた塩化水素の濃度が１体積％以下のガスの量と該ガス中の無機化合物の濃度を測定する工程
を含み、第２工程で測定したガスの量に該ガス中の無機化合物の濃度を乗じて得られる値を、第１工程で測定した塩化水素の量と第２工程で測定したガス量との合計量で除することを特徴とする塩化水素を含有する混合ガス中の無機化合物の濃度の測定方法。The following 1st and 2nd processes 1st process: The hydrogen chloride concentration is reduced to 1% by volume or less by removing hydrogen chloride in the mixed gas containing hydrogen into water, and removed. A step of measuring the amount of hydrogen chloride formed, a second step: a step of measuring the amount of gas having a hydrogen chloride concentration of 1% by volume or less obtained in the first step and the concentration of an inorganic compound in the gas; The value obtained by multiplying the amount of gas measured in the second step by the concentration of the inorganic compound in the gas is the sum of the amount of hydrogen chloride measured in the first step and the amount of gas measured in the second step. A method for measuring the concentration of an inorganic compound in a mixed gas containing hydrogen chloride, wherein
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002331998A JP4232439B2 (en) | 2002-11-15 | 2002-11-15 | Method for measuring the concentration of inorganic compounds in gas mixtures containing hydrogen chloride |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002331998A JP4232439B2 (en) | 2002-11-15 | 2002-11-15 | Method for measuring the concentration of inorganic compounds in gas mixtures containing hydrogen chloride |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2004163362A JP2004163362A (en) | 2004-06-10 |
| JP4232439B2 true JP4232439B2 (en) | 2009-03-04 |
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| JP2002331998A Expired - Fee Related JP4232439B2 (en) | 2002-11-15 | 2002-11-15 | Method for measuring the concentration of inorganic compounds in gas mixtures containing hydrogen chloride |
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| JP (1) | JP4232439B2 (en) |
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| JP2004163362A (en) | 2004-06-10 |
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