JP3856775B2 - ガスセンサ - Google Patents
ガスセンサ Download PDFInfo
- Publication number
- JP3856775B2 JP3856775B2 JP2003317851A JP2003317851A JP3856775B2 JP 3856775 B2 JP3856775 B2 JP 3856775B2 JP 2003317851 A JP2003317851 A JP 2003317851A JP 2003317851 A JP2003317851 A JP 2003317851A JP 3856775 B2 JP3856775 B2 JP 3856775B2
- Authority
- JP
- Japan
- Prior art keywords
- gas
- interference
- sulfate
- sensor
- working electrode
- 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 - Lifetime
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- 238000005259 measurement Methods 0.000 claims description 17
- 229910052751 metal Inorganic materials 0.000 claims description 16
- 239000002184 metal Substances 0.000 claims description 16
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 claims description 15
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims description 13
- 239000000463 material Substances 0.000 claims description 12
- 239000000843 powder Substances 0.000 claims description 12
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 11
- 239000012528 membrane Substances 0.000 claims description 10
- YPNVIBVEFVRZPJ-UHFFFAOYSA-L silver sulfate Chemical compound [Ag+].[Ag+].[O-]S([O-])(=O)=O YPNVIBVEFVRZPJ-UHFFFAOYSA-L 0.000 claims description 10
- 239000005909 Kieselgur Substances 0.000 claims description 9
- 229910000367 silver sulfate Inorganic materials 0.000 claims description 9
- PIJPYDMVFNTHIP-UHFFFAOYSA-L lead sulfate Chemical compound [PbH4+2].[O-]S([O-])(=O)=O PIJPYDMVFNTHIP-UHFFFAOYSA-L 0.000 claims description 8
- 239000003792 electrolyte Substances 0.000 claims description 7
- 238000007599 discharging Methods 0.000 claims description 3
- 238000003487 electrochemical reaction Methods 0.000 claims description 3
- 230000002452 interceptive effect Effects 0.000 claims description 2
- 239000007789 gas Substances 0.000 description 106
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 10
- 238000006243 chemical reaction Methods 0.000 description 10
- 238000009423 ventilation Methods 0.000 description 9
- 238000001514 detection method Methods 0.000 description 8
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 6
- 239000003795 chemical substances by application Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 239000008151 electrolyte solution Substances 0.000 description 5
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 4
- 230000035945 sensitivity Effects 0.000 description 4
- 238000005868 electrolysis reaction Methods 0.000 description 3
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 3
- 239000004810 polytetrafluoroethylene Substances 0.000 description 3
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 150000003467 sulfuric acid derivatives Chemical class 0.000 description 2
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 238000007772 electroless plating Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 238000007733 ion plating Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910000510 noble metal Inorganic materials 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 238000001771 vacuum deposition Methods 0.000 description 1
Images
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- Measuring Oxygen Concentration In Cells (AREA)
Description
(1)作用電極と対極及び電解質からなり、両極間に流れる電流を取り出す燃料電池式センサ
(2)作用電極と対極及び電解質からなり、外部駆動回路により作用電極と対極間の電位差を一定に保ちながら両極間に流れる電流を取り出す2電極定電位電解式センサ
(3)作用電極と対極及び比較電極の3電極と電解質からなり、外部駆動回路により比較電極に対する作用電極の電位差を一定に保ちながら、作用電極と対極間に流れる電流を取り出す3電極定電位電解式センサ
H2S+4H2O → H2SO4+8H++8e- …(2)
なお、実際の感度比(H2S)/(SO2)の値は3〜5倍である。
請求項2記載の発明は、請求項1記載の発明において、前記干渉ガス除去部の厚さが2mm〜5mmであるものである。
請求項3記載の発明は、請求項1又は2のいずれか1項記載の発明において、前記干渉ガス除去部が、硫酸銀、硫酸鉛及び硫酸バリウムからなる群から選択される材料から構成されているものである。
請求項4記載の発明は、請求項1乃至3のいずれか1項記載の発明において、前記干渉ガス除去部が、前記金属硫酸塩に珪藻土粉末を混合した材料から構成されているものである。
Ag2SO4+H2S → Ag2S+H2SO4 …(3)
その結果、本発明によれば、共存するH2Sの濃度にかかわらずSO2の濃度を正確に測定することが可能になる。
図1は、本発明の実施の形態である3電極定電位電解式センサの一例を示す断面図である。
図1に示すように、本実施の形態のガスセンサ1は、両端部にそれぞれ開口部2a、2bを 有する筒状の容器本体2と、容器本体2の両端部に取り付けられる第1及び第2の側板3A、3Bとを有し、容器本体2内には、硫酸、リン酸等の水溶液からなる電解液(電解質)20が充填されている。
本発明の場合、金属硫酸塩と珪藻土粉末の配合比は特に限定されることはないが、除去効率の確保の観点からは、5:1〜1:5とすることが好ましい。
SO2+2H2O → H2SO4+2H++2e- …(4)
図2に示すように、本実施の形態においては、干渉ガス除去部を通気系の経路に配置したものである。
例えば、上述の実施の形態においては、3電極定電位電荷式のガスセンサを例にとって説明したが、本発明はこれに限られず、例えば2電極定電位電解式センサや燃料電池式のガスセンサに適用することも可能である。
Claims (4)
- 電解質と接する作用電極と対極を有し、測定ガスをガス供給部から前記作用電極に供給して電気化学的に反応させ、前記作用電極と対極間に発生した電流に基づいて前記測定ガスの濃度を測定するガスセンサであって、
前記ガス供給部が、前記測定ガスを導入するガス導入口と前記測定ガスを排出するガス排出口に連通され、前記ガス供給部の前記ガス導入口及び前記ガス排出口側に、非水溶性の金属硫酸塩を主成分とする材料からなりガス透過性膜によって挟まれた状態で保持された干渉ガス除去部が設けられているガスセンサ。 - 前記干渉ガス除去部の厚さが2mm〜5mmである請求項1記載のガスセンサ。
- 前記干渉ガス除去部が、硫酸銀、硫酸鉛及び硫酸バリウムからなる群から選択される材料から構成されている請求項1又は2のいずれか1項記載のガスセンサ。
- 前記干渉ガス除去部が、前記金属硫酸塩に珪藻土粉末を混合した材料から構成されている請求項1乃至3のいずれか1項記載のガスセンサ。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003317851A JP3856775B2 (ja) | 2003-09-10 | 2003-09-10 | ガスセンサ |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003317851A JP3856775B2 (ja) | 2003-09-10 | 2003-09-10 | ガスセンサ |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2005083956A JP2005083956A (ja) | 2005-03-31 |
JP3856775B2 true JP3856775B2 (ja) | 2006-12-13 |
Family
ID=34417292
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2003317851A Expired - Lifetime JP3856775B2 (ja) | 2003-09-10 | 2003-09-10 | ガスセンサ |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP3856775B2 (ja) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5339538B2 (ja) * | 2010-04-30 | 2013-11-13 | 大阪瓦斯株式会社 | ガスセンサ |
JP6076196B2 (ja) * | 2013-05-27 | 2017-02-08 | 理研計器株式会社 | 可燃性ガス検出器用硫化水素除去フィルタ |
DE102014002500A1 (de) | 2014-02-21 | 2015-08-27 | Dräger Safety AG & Co. KGaA | Elektrochemischer Gassensor |
GB2525393A (en) * | 2014-04-22 | 2015-10-28 | Sprue Safety Products Ltd | Electrochemical cell |
JP6576053B2 (ja) * | 2015-03-06 | 2019-09-18 | 新コスモス電機株式会社 | 定電位電解式ガスセンサ |
DE102023104898A1 (de) * | 2022-05-06 | 2023-11-09 | Dräger Safety AG & Co. KGaA | Elektrochemischer Gassensor zur Detektion hoher Phosphinkonzentrationen |
-
2003
- 2003-09-10 JP JP2003317851A patent/JP3856775B2/ja not_active Expired - Lifetime
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Publication number | Publication date |
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JP2005083956A (ja) | 2005-03-31 |
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