JP6752558B2 - 定電位電解式ガスセンサ - Google Patents
定電位電解式ガスセンサ Download PDFInfo
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- JP6752558B2 JP6752558B2 JP2015153282A JP2015153282A JP6752558B2 JP 6752558 B2 JP6752558 B2 JP 6752558B2 JP 2015153282 A JP2015153282 A JP 2015153282A JP 2015153282 A JP2015153282 A JP 2015153282A JP 6752558 B2 JP6752558 B2 JP 6752558B2
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- 239000007789 gas Substances 0.000 claims description 154
- 239000008151 electrolyte solution Substances 0.000 claims description 38
- 238000006243 chemical reaction Methods 0.000 claims description 36
- 230000015572 biosynthetic process Effects 0.000 claims description 29
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 22
- 239000001301 oxygen Substances 0.000 claims description 22
- 229910052760 oxygen Inorganic materials 0.000 claims description 22
- 239000012528 membrane Substances 0.000 claims description 19
- 238000013022 venting Methods 0.000 claims description 8
- 239000012466 permeate Substances 0.000 claims description 5
- 230000000052 comparative effect Effects 0.000 description 9
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 6
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 5
- 238000009423 ventilation Methods 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 4
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 4
- 239000003054 catalyst Substances 0.000 description 4
- 230000002452 interceptive effect Effects 0.000 description 4
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 4
- 239000004810 polytetrafluoroethylene Substances 0.000 description 4
- 238000005868 electrolysis reaction Methods 0.000 description 3
- 239000010931 gold Substances 0.000 description 3
- XYFCBTPGUUZFHI-UHFFFAOYSA-N Phosphine Chemical compound P XYFCBTPGUUZFHI-UHFFFAOYSA-N 0.000 description 2
- 239000004809 Teflon Substances 0.000 description 2
- 229920006362 Teflon® Polymers 0.000 description 2
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 2
- 230000002378 acidificating effect Effects 0.000 description 2
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 229920006026 co-polymeric resin Polymers 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 238000003411 electrode reaction Methods 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 239000003365 glass fiber Substances 0.000 description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 2
- 229910052737 gold Inorganic materials 0.000 description 2
- 230000002209 hydrophobic effect Effects 0.000 description 2
- 229910052763 palladium Inorganic materials 0.000 description 2
- 229910052697 platinum Inorganic materials 0.000 description 2
- -1 polytetrafluoroethylene Polymers 0.000 description 2
- 239000005871 repellent Substances 0.000 description 2
- PEVRKKOYEFPFMN-UHFFFAOYSA-N 1,1,2,3,3,3-hexafluoroprop-1-ene;1,1,2,2-tetrafluoroethene Chemical group FC(F)=C(F)F.FC(F)=C(F)C(F)(F)F PEVRKKOYEFPFMN-UHFFFAOYSA-N 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 229910000990 Ni alloy Inorganic materials 0.000 description 1
- KJTLSVCANCCWHF-UHFFFAOYSA-N Ruthenium Chemical compound [Ru] KJTLSVCANCCWHF-UHFFFAOYSA-N 0.000 description 1
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- RBFQJDQYXXHULB-UHFFFAOYSA-N arsane Chemical compound [AsH3] RBFQJDQYXXHULB-UHFFFAOYSA-N 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- ZOCHARZZJNPSEU-UHFFFAOYSA-N diboron Chemical compound B#B ZOCHARZZJNPSEU-UHFFFAOYSA-N 0.000 description 1
- 229910001882 dioxygen Inorganic materials 0.000 description 1
- 239000007772 electrode material Substances 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 150000004678 hydrides Chemical class 0.000 description 1
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 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
- 238000012856 packing Methods 0.000 description 1
- 229910000073 phosphorus hydride Inorganic materials 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229910052707 ruthenium Inorganic materials 0.000 description 1
- WOCIAKWEIIZHES-UHFFFAOYSA-N ruthenium(iv) oxide Chemical compound O=[Ru]=O WOCIAKWEIIZHES-UHFFFAOYSA-N 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 229910000077 silane Inorganic materials 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 description 1
- 239000002341 toxic gas Substances 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
Images
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
- G01N27/403—Cells and electrode assemblies
- G01N27/404—Cells with anode, cathode and cell electrolyte on the same side of a permeable membrane which separates them from the sample fluid, e.g. Clark-type oxygen sensors
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
- G01N27/416—Systems
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Physics & Mathematics (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Molecular Biology (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
Description
また、本構成のように気泡形成抑制手段を保水部材とすれば、電解液収容部に臨む少なくとも対極の表面に混入した気泡がより到達し難くなり、対極の表面に気泡が形成されるのを確実に抑制することができる。
さらに、ガス通気部に空気層および酸素透過膜を配設することで、周囲の干渉ガス(酸素以外)がガス通気部から対極および参照極に入り込むのを防ぐことができる。
本発明に係る定電位電解式ガスセンサの第二特徴構成は、前記対極および前記参照極の側に形成したガスを通気する貫通孔を設けた点にある。
本構成によれば、対極および参照極の側に形成した貫通孔を介して気泡が混入した場合であっても、対極および参照極の表面に混入した気泡が到達し難くなる。従って、対極および参照極の表面に気泡が形成されるのを抑制することができる。
図1に示すように、定電位電解式ガスセンサXは、ガスを検知するガス電極10として被検知ガスを電気化学反応させる反応極11、当該反応極11に対する対極12、反応極11の電位を制御する参照極13を、電解槽30に収容した電解液20に接触するように備えている。この定電位電解式ガスセンサXは、少なくとも対極12の表面に気泡が形成されるのを抑制する気泡形成抑制手段50を備える。
上述した実施形態では、ガス通気部33には、空気層40および酸素を透過する酸素透過膜41を配設する態様について説明した。しかし、このような態様に限らず、空気層40および酸素透過膜41を設けず、ガス通気部33の側における貫通孔16bに、ピンホール34aを形成した筒部材34を配設するように構成してもよい(図2)。
本発明の実施例について説明する。
本実施例の定電位電解式ガスセンサXを以下の態様とした。
即ち、図1の態様の定電位電解式ガスセンサXにおいて、厚さ1mmのバッファーフィルター35を多孔質テフロン(登録商標)膜(PTFE膜)とし、保水部材37をガラス繊維製の部材とし、酸素透過膜41を4フッ化エチレン6フッ化プロピレン共重合樹脂(FEP)とし、フィルタ層61を四層の活性炭層とし、保持部材62をSUSメッシュとした。また、貫通孔16a,16bの直径を2mmとし、対極12及び参照極13の間に形成したスリット14aの幅を1.5mmとした。
上述した別実施形態の定電位電解式ガスセンサXにおいて、外乱の影響でセンサの温度が急激に変化(−10℃から50℃へ急変)した場合にセンサの指示値がどのように変化するか、調べた。
10 ガス電極
11 反応極
12 対極
13 参照極
20 電解液
30 電解槽
37 保水部材
41 酸素透過膜
50 気泡形成抑制手段
Claims (4)
- ガスを検知するガス電極として被検知ガスを電気化学反応させる反応極、前記反応極に対する対極および前記反応極の電位を制御する参照極を、電解槽に収容した電解液に接触するように備えた定電位電解式ガスセンサであって、
少なくとも前記対極の表面に気泡が形成されるのを抑制する気泡形成抑制手段を備え、
前記気泡形成抑制手段が、前記電解液を吸水して保持する保水部材であり、
前記対極および前記参照極の側に形成したガスを通気するガス通気部に、空気層および酸素を透過する酸素透過膜を配設した定電位電解式ガスセンサ。 - 前記対極および前記参照極の側に形成したガスを通気する貫通孔を設けた請求項1に記載の定電位電解式ガスセンサ。
- 前記保水部材の充填率を90%以上としてある請求項1または2に記載の定電位電解式ガスセンサ。
- 前記保水部材の嵩密度を0.05〜0.30g/cm3としてある請求項1〜3の何れか一項に記載の定電位電解式ガスセンサ。
Priority Applications (3)
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JP2015153282A JP6752558B2 (ja) | 2015-08-03 | 2015-08-03 | 定電位電解式ガスセンサ |
PCT/JP2016/072872 WO2017022812A1 (ja) | 2015-08-03 | 2016-08-03 | 定電位電解式ガスセンサ |
CN201680045156.9A CN107850563A (zh) | 2015-08-03 | 2016-08-03 | 恒电位电解式气体传感器 |
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JP2015153282A JP6752558B2 (ja) | 2015-08-03 | 2015-08-03 | 定電位電解式ガスセンサ |
Publications (2)
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JP2017032427A JP2017032427A (ja) | 2017-02-09 |
JP6752558B2 true JP6752558B2 (ja) | 2020-09-09 |
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Country Status (3)
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JP (1) | JP6752558B2 (ja) |
CN (1) | CN107850563A (ja) |
WO (1) | WO2017022812A1 (ja) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6517422B1 (ja) * | 2018-12-27 | 2019-05-22 | 新コスモス電機株式会社 | 定電位電解式ガスセンサおよび定電位電解式ガスセンサを備える吸引式ガス検知器 |
JP6517423B1 (ja) * | 2018-12-27 | 2019-05-22 | 新コスモス電機株式会社 | 定電位電解式ガスセンサ |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6140557A (ja) * | 1984-07-31 | 1986-02-26 | Japan Storage Battery Co Ltd | ガルバニ電池式酸素センサ− |
GB8430803D0 (en) * | 1984-12-06 | 1985-01-16 | Bergman I | Electrochemical cell |
JP2506458B2 (ja) * | 1989-10-11 | 1996-06-12 | 新コスモス電機株式会社 | 電解式ガスセンサ |
JPH06242059A (ja) * | 1993-02-19 | 1994-09-02 | Gastec:Kk | 電気化学式ガスセンサ |
JP4507235B2 (ja) * | 2003-10-30 | 2010-07-21 | 理研計器株式会社 | 電気化学式ガスセンサ |
CN101275923B (zh) * | 2007-03-26 | 2013-04-10 | 华瑞科学仪器(上海)有限公司 | 气体传感器 |
JP6212768B2 (ja) * | 2013-03-30 | 2017-10-18 | 新コスモス電機株式会社 | 電気化学式ガスセンサ |
JP6315983B2 (ja) * | 2013-12-26 | 2018-04-25 | 新コスモス電機株式会社 | 定電位電解式ガスセンサ |
CN204142678U (zh) * | 2014-10-24 | 2015-02-04 | 荆州市爱尔瑞科技有限公司 | 一种三电极电化学气体传感器 |
-
2015
- 2015-08-03 JP JP2015153282A patent/JP6752558B2/ja active Active
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2016
- 2016-08-03 CN CN201680045156.9A patent/CN107850563A/zh active Pending
- 2016-08-03 WO PCT/JP2016/072872 patent/WO2017022812A1/ja active Application Filing
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Publication number | Publication date |
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WO2017022812A1 (ja) | 2017-02-09 |
JP2017032427A (ja) | 2017-02-09 |
CN107850563A (zh) | 2018-03-27 |
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