JP6076196B2 - Hydrogen sulfide removal filter for flammable gas detector - Google Patents
Hydrogen sulfide removal filter for flammable gas detector Download PDFInfo
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- JP6076196B2 JP6076196B2 JP2013110502A JP2013110502A JP6076196B2 JP 6076196 B2 JP6076196 B2 JP 6076196B2 JP 2013110502 A JP2013110502 A JP 2013110502A JP 2013110502 A JP2013110502 A JP 2013110502A JP 6076196 B2 JP6076196 B2 JP 6076196B2
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- Prior art keywords
- hydrogen sulfide
- gas detector
- removal filter
- sulfide removal
- flammable gas
- 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.)
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- 239000007789 gas Substances 0.000 title claims description 24
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 title claims description 16
- 229910000037 hydrogen sulfide Inorganic materials 0.000 title claims description 16
- 239000000463 material Substances 0.000 claims description 19
- 239000002245 particle Substances 0.000 claims description 8
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 6
- LMEWRZSPCQHBOB-UHFFFAOYSA-M silver;2-hydroxypropanoate Chemical compound [Ag+].CC(O)C([O-])=O LMEWRZSPCQHBOB-UHFFFAOYSA-M 0.000 claims description 6
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 3
- 239000008187 granular material Substances 0.000 claims 2
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 6
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 6
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 6
- 238000001514 detection method Methods 0.000 description 5
- NNPPMTNAJDCUHE-UHFFFAOYSA-N isobutane Chemical compound CC(C)C NNPPMTNAJDCUHE-UHFFFAOYSA-N 0.000 description 4
- SQGYOTSLMSWVJD-UHFFFAOYSA-N silver(1+) nitrate Chemical compound [Ag+].[O-]N(=O)=O SQGYOTSLMSWVJD-UHFFFAOYSA-N 0.000 description 4
- 239000002250 absorbent Substances 0.000 description 3
- 230000002745 absorbent Effects 0.000 description 3
- 239000002253 acid Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 229910052946 acanthite Inorganic materials 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 239000001282 iso-butane Substances 0.000 description 2
- 239000000395 magnesium oxide Substances 0.000 description 2
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 2
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 229910001961 silver nitrate Inorganic materials 0.000 description 2
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- XUARKZBEFFVFRG-UHFFFAOYSA-N silver sulfide Chemical compound [S-2].[Ag+].[Ag+] XUARKZBEFFVFRG-UHFFFAOYSA-N 0.000 description 1
- 229940056910 silver sulfide Drugs 0.000 description 1
- FSJWWSXPIWGYKC-UHFFFAOYSA-M silver;silver;sulfanide Chemical compound [SH-].[Ag].[Ag+] FSJWWSXPIWGYKC-UHFFFAOYSA-M 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
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- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
- Investigating Or Analyzing Materials By The Use Of Fluid Adsorption Or Reactions (AREA)
- Gas Separation By Absorption (AREA)
Description
本発明は、メタン、イソブタン、メチルエチルケトン、トルエン等の可燃性ガス検出器のガス流入口に配置して硫化水素を除去するのに適したフィルタに関する。 The present invention relates to a filter suitable for removing hydrogen sulfide by being disposed at a gas inlet of a combustible gas detector such as methane, isobutane, methyl ethyl ketone, and toluene.
メタン、イソブタン、メチルエチルケトン、トルエン等の可燃性ガスの検出には半導体ガスセンサが利用されているが、このセンサは被検出流体（エア）に硫化水素が含まれていると検出出力値が低下するという問題がある。
このような硫化水素による影響を防止するために特許文献１のようなフィルタをガス検出器のガス流入口に配置することが提案されている。
Semiconductor gas sensors are used to detect flammable gases such as methane, isobutane, methyl ethyl ketone, and toluene. However, this sensor has a lower detection output value if hydrogen sulfide is contained in the fluid to be detected (air). There's a problem.
In order to prevent such an influence caused by hydrogen sulfide, it has been proposed to dispose a filter as in
このフィルタは、ガス流入口側に硝酸銀を担持させたシリカ粒子を、また下流側に酸化マグネシウムを担持させたシリカ粒子を筒状容器に充填して構成されている。 This filter is constituted by filling the silica particles were supported silver nitrate in the gas flow inlet side, also by silica particles supporting magnesium oxide to the downstream side in the cylindrical vessel.
しかしながら、硝酸銀と硫化水素との反応により酸性ガス、つまり硝酸ガスが発生するため、下流側に被検出ガスに無反応、非吸着の除酸剤（酸化マグネシウム）が必要になるという問題がある。
本発明は、このような問題に鑑みてなされたものであって、その目的とするところは除酸剤が不要な可燃性ガス検出器用硫化水素除去フィルタを提供することである。
However, since acid gas, that is, nitric acid gas, is generated by the reaction between silver nitrate and hydrogen sulfide, there is a problem that a non-reacting, non-adsorbing deoxidizing agent (magnesium oxide) is required for the gas to be detected on the downstream side.
This invention is made | formed in view of such a problem, The place made into the objective is providing the hydrogen sulfide removal filter for combustible gas detectors which do not require a deoxidizer.
このような課題を達成するために本発明の可燃性ガス検出器用硫化水素除去フィルタは粒状体の基材に乳酸銀を担持させて構成されている。 In order to achieve such a problem, the hydrogen sulfide removal filter for a combustible gas detector of the present invention is configured by supporting silver lactate on a granular base material.
乳酸銀は、硫化水素と酸性ガスを生じることなく反応して硫化水素が検出器に流れ込むのを防止する。 Silver lactate reacts with hydrogen sulfide without generating acid gas to prevent hydrogen sulfide from flowing into the detector.
そこで以下に本発明の詳細を実施例に基づいて説明する。
フィルタを構成する吸収剤１は、被験ガスである可燃性ガスに非活性な材料からなり、積層状態でも通気性を確保できる程度粒径の基材、たとえば粒径0.5ｍｍのアルミナ粒子を担体として乳酸銀を担持させて構成されている。
Therefore, details of the present invention will be described below based on examples.
The
すなわち、濃度１Ｗ／ｖ％の乳酸銀の水溶液に基材を浸漬させ、その後に基材を溶液から引き上げ、室温よりも若干高い温度、例えば40℃程度で自然乾燥させる。 That is, the base material is immersed in an aqueous solution of silver lactate having a concentration of 1 W / v%, and then the base material is pulled out of the solution and naturally dried at a temperature slightly higher than room temperature, for example, about 40 ° C.
そして両端に通気口２、３を有する内径１１.５ｍｍの筒状容器４に通気性を備えた粒子抜け止め板５，５を介して層厚１０ｍｍとなるように上記吸収剤１を充填してフィルタを制作し、濃度５０ｐｐｍの硫化水素を含む空気を５００ｃｃ／分でこのフィルタ材に供給したところ吸収剤が担持している薬剤の量に比例して図２に示したように破過時間が長くなった
Then, the absorbent 1 is filled into a cylindrical container 4 having an inner diameter of 11.5 mm having
このフィルタ材は吸収剤に担持されている乳酸銀が硫化水素と
２Ｃ3Ｈ5ＡｇＯ3 ＋ Ｈ2Ｓ →Ａｇ2Ｓ＋２Ｃ3Ｈ6Ｏ3
なる反応により酸性ガスを発生することなく、また被検出物である可燃性ガスと反応、吸着することなく硫化水素を捕捉する。
This filter material is made of silver sulfide and 2C3H5AgO3 + H2S → Ag2S + 2C3H6O3.
By this reaction, hydrogen sulfide is captured without generating acid gas and without reacting with or adsorbing the combustible gas as the detection target.
図３は、メタン（５０％LEL）と硫化水素（１０ｐｐｍ）との混合ガスを一定期間連続して本願発明のフィルタ材を使用して測定した場合（■）とフィルタ材を使用しないで測定した場合（◆）との検出結果を示すもので、フィルタ材を使用しない場合には検出値が急速に低下しているが、本発明のフィルタ材を使用した場合には１８時間を経過しても検出値の低下は見られなかった。 FIG. 3 shows a case where a mixed gas of methane (50% LEL) and hydrogen sulfide (10 ppm) was measured continuously for a certain period using the filter material of the present invention (■) and without using the filter material. This shows the detection result with the case (◆). The detection value decreases rapidly when the filter material is not used, but when the filter material of the present invention is used, 18 hours have passed. There was no decrease in the detected value.
なお、上述の実施例においては粒径の基材としてアルミナ粒子を使用したが、同程度の粒径のシリカゲル等のシリカ粒子を用いても同様の効果を奏する。
すなわち、シリカ粒子は多孔質体であるため単体では被験ガスを吸着するが、本発明においては乳酸銀により被覆されるため多孔質体としての機能が喪失し、被検出物である可燃性ガスは吸着を受けることなくフィルタを通過する。
In the above-described embodiments, alumina particles are used as the base material having a particle size. However, the same effect can be obtained by using silica particles such as silica gel having the same particle size.
That is, since the silica particles are a porous body, they adsorb the test gas alone, but in the present invention, the function as the porous body is lost because it is coated with silver lactate, and the combustible gas that is the object to be detected is Passes through the filter without being adsorbed.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2013110502A JP6076196B2 (en) | 2013-05-27 | 2013-05-27 | Hydrogen sulfide removal filter for flammable gas detector |
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|---|---|---|---|
| JP2013110502A JP6076196B2 (en) | 2013-05-27 | 2013-05-27 | Hydrogen sulfide removal filter for flammable gas detector |
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| Publication Number | Publication Date |
|---|---|
| JP2014228501A JP2014228501A (en) | 2014-12-08 |
| JP6076196B2 true JP6076196B2 (en) | 2017-02-08 |
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Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2838601B2 (en) * | 1991-03-15 | 1998-12-16 | クラレケミカル株式会社 | Odor gas adsorbent |
| JP3324856B2 (en) * | 1993-12-28 | 2002-09-17 | ゼオン化成株式会社 | Deodorizer and deodorant composite material |
| US6344174B1 (en) * | 1999-01-25 | 2002-02-05 | Mine Safety Appliances Company | Gas sensor |
| JP2003149100A (en) * | 2001-11-12 | 2003-05-21 | Riken Keiki Co Ltd | Filter for removing disturbance gas for gas detecting apparatus |
| JP3938313B2 (en) * | 2002-02-08 | 2007-06-27 | 理研計器株式会社 | Hydrogen sulfide removal filter for sulfur dioxide detector |
| JP3856775B2 (en) * | 2003-09-10 | 2006-12-13 | 光明理化学工業株式会社 | Gas sensor |
| CN1993169A (en) * | 2004-08-02 | 2007-07-04 | 国际壳牌研究有限公司 | Process for removing mercaptans from a gas stream comprising natural gas or an inert gas |
| JP4931244B2 (en) * | 2007-11-16 | 2012-05-16 | 理研計器株式会社 | Hydrogen sulfide removal filter for gas detector |
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