CA1040264A
Expired / Lapsed
CA
⏱️ 0.0 years remaining
Solid state sensor for anhydrides
Assignee: Hydro-Québec
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Filing: 1975-08-29
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Granted: 1978-10-10
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Expires: 1995-08-29
Abstract
Abstract ABSTRACT OF THE DISCLOSURE: The invention concerns a method of and a sensor for detecting the activity of gaseous anhydrides in an oxygen-bearing gas. It comprises a solid state electrolyte element having oxy-anions of the element forming the anhydride to be detected, a re-ference electrode being in contact with the electrolyte element, a detection electrode remote from the reference electrode and also in contact with the electrolyte element. A metal salt material is placed nearby the reference electrode, that metal salt being se-lected such that it evolves an anhydride gas identical to the an-hydride to be detected. The electrolyte and detection electrode are arranged such that they are free to come into contact with the gaseous anhydride to be detected whereas the reference and detection electrodes are arranged such that a difference of poten-tial occurs therebetween when a sample of the anhydride to be detected is contacted with the detection electrode and with the electrolyte element. The electrolyte element and the metal salt material are heated to a temperature such that a logarithmic va-riation in the concentration of the anhydride to be detected causes a proportional and substantially linear variation in the difference of potential, that temperature being below the fusion temperature of said electrolyte element. A potentiometric measurement device is connected to the electrodes for measuring the activity of the anhydride to be detected by measuring the set difference of potential.
Inventors
- 👤 Andre M. Chamberland
- 👤 Michel Gauthier
Bibliographic Details
Application Number
—
Jurisdiction
CA
Data Source
google_patents
Last Synchronized
2026-10-31 11:18
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/26; G01N27/416; G01N27/417; G01N27/403; G01N27/406; G01N27/407; G01N27/4073; G01N27/4074
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
224 words
A sensor for detecting the activity of gaseous an-hydrides in an oxygen-bearing gas, comprising: a solid state electrolyte element having oxy-anions of the element forming the anhydride to be detected; a reference electrode being in contact with said elec-trolyte element, a detection electrode remote from said reference electrode and also in contact with the electrolyte element; a metal salt material being placed nearby said reference electrode, said metal salt being selected such that it evolves an anhydride gas identical to the anhydride to be detected; said electrolyte and detection electrode being arranged such that they are free to come into contact with said gaseous an-hydride to be detected, said reference and detection electrodes being arranged such that a difference of potential occurs between said reference and detection electrodes when a sample of said anhydride to be detected is contacted with said detection electrode and with said electrolyte element; heating means for heating said electrolyte element and said metal salt material to a temperature such that a logarithmic variation in the concentration of the anhydride to be detected causes a proportional and substantially linear variation in said difference of potential, said temperature being below the fusion temperature of said electrolyte element; a potentiometric measurement device connected to said electrodes for measuring the activity of said anhydride to be de-tected by measuring said difference of potential.
Claim 2
Dependent Claim
224 words
A sensor for detecting the activity of gaseous an-hydrides in an oxygen-bearing gas, comprising: a solid state electrolyte element having oxy-anions of the element forming the anhydride to be detected; a reference electrode being in contact with said elec-trolyte element, a detection electrode remote from said reference electrode and also in contact with the electrolyte element; a metal salt material being placed nearby said reference electrode, said metal salt being selected such that it evolves an anhydride gas identical to the anhydride to be detected; said electrolyte and detection electrode being arranged such that they are free to come into contact with said gaseous an-hydride to be detected, said reference and detection electrodes being arranged such that a difference of potential occurs between said reference and detection electrodes when a sample of said anhydride to be detected is contacted with said detection electrode and with said electrolyte element; heating means for heating said electrolyte element and said metal salt material to a temperature such that a logarithmic variation in the concentration of the anhydride to be detected causes a proportional and substantially linear variation in said difference of potential, said temperature being below the fusion temperature of said electrolyte element; a potentiometric measurement device connected to said electrodes for measuring the activity of said anhydride to be de-tected by measuring said difference of potential.
Claim 3
Dependent Claim
56 words
A sensor as claimed in claim 1, wherein said solid state electrolyte element is tightly inserted inside a support means so as to define a reference compartment, said metal salt material being disposed in said reference compartment so that the anhydride gas evolved from the metal salt material contacts said reference electrode and said electrolyte element.
Claim 4
Dependent Claim
28 words
A sensor as claimed in claim 2, wherein said support means also defines a detection compartment in which is introduced the sample of said anhydride to be detected.
Claim 5
Dependent Claim
15 words
A sensor as claimed in claim 3, wherein said refe-rence and detection compartments are air-tight.
Claim 6
Dependent Claim
37 words
A sensor as claimed in claim 1, characterized in that said solid state electrolyte element comprises an alkali metal salt or an alkali-earth metal salt containing the oxy-anions of the element forming the anhydride to be detected.
Claim 7
Dependent Claim
42 words
A sensor as claimed in claim 3, characterized in that a supply conduit brings the sample of the anhydride to be detected in contact with said detection electrode and that an outlet conduit exhausts the sample of said anhydride to be detected.
Claim 8
Dependent Claim
27 words
A sensor as claimed in claim 6, wherein said detec-tion compartment is hermetically insulated from outside and is provided with openings through which said conduits are inserted.
Claim 9
Dependent Claim
56 words
A sensor as claimed in claim 1, wherein one solid material is embedded within said electrolyte element at said detection electrode, said solid material having two channels bored therethrough, which channels are in gas communication with each other by way of a passage at one extremity thereof, and said de-tection electrode being located in said passage.
Claim 10
Dependent Claim
27 words
A sensor as claimed in claim 8, wherein additional channels are provided in said solid material to run leads connect-ing said detection electrode to said measurement device.
Claim 11
Independent Claim
246 words
A method of detecting and measuring the activity of gaseous anhydrides in an oxygen-bearing gas, comprising the steps of: forming a solid state electrolyte element having oxy-anions of the element forming the anhydride to be detected, a refe-rence electrode being in contact with said electrolyte element, a detection electrode remote from said reference electrode and also in contact with the electrolyte element, said electrolyte element and detection electrode being arranged such that they are free to come into contact with the gaseous anhydride to be detected, said reference and detection electrodes being arranged such that a dif-ference of potential occurs therebetween when a sample of said anhydride to be detected is contacted with said detection electrode and with said electrolyte element; heating said electrolyte element to a temperature below the fusion temperature thereof and such that a logarithmic varia-tion in the concentration of the anhydride sample to be detected causes a proportional and substantially linear variation in said difference of potential; evolving at said reference electrode an anhydride gas identical to the anhydride to be detected by heating a metal salt material containing the anhydride gas identical to the anhydride to be detected at said electrolyte temperature; passing the sample of said anhydride to be detected into contact with said detection electrode and said electrolyte element so as to result in said difference of potential between said two electrodes; and measuring said difference of potential across the reference and detection electrodes with a potentiometric measure-ment device.
Claim 12
Independent Claim
246 words
A method of detecting and measuring the activity of gaseous anhydrides in an oxygen-bearing gas, comprising the steps of: forming a solid state electrolyte element having oxy-anions of the element forming the anhydride to be detected, a refe-rence electrode being in contact with said electrolyte element, a detection electrode remote from said reference electrode and also in contact with the electrolyte element, said electrolyte element and detection electrode being arranged such that they are free to come into contact with the gaseous anhydride to be detected, said reference and detection electrodes being arranged such that a dif-ference of potential occurs therebetween when a sample of said anhydride to be detected is contacted with said detection electrode and with said electrolyte element; heating said electrolyte element to a temperature below the fusion temperature thereof and such that a logarithmic varia-tion in the concentration of the anhydride sample to be detected causes a proportional and substantially linear variation in said difference of potential; evolving at said reference electrode an anhydride gas identical to the anhydride to be detected by heating a metal salt material containing the anhydride gas identical to the anhydride to be detected at said electrolyte temperature; passing the sample of said anhydride to be detected into contact with said detection electrode and said electrolyte element so as to result in said difference of potential between said two electrodes; and measuring said difference of potential across the reference and detection electrodes with a potentiometric measure-ment device.
Claim 13
Dependent Claim
25 words
A method as claimed in claim 10, characterized in that the electrolyte element is formed by sintering an alkali salt or an alkali-earth metal salt.
Claim 14
Dependent Claim
23 words
A method as claimed in claim 10, characterized in that said metal salt material is placed in a compartment hermeti-cally insulated from outside.
Claim 15
Dependent Claim
44 words
A method as claimed in claim 10, characterized in that the sample of the anhydride to be detected is passed into con-tact with said detection electrode and said electrolyte by means of supply and exhaust conduits connected to a compartment herme-tically insulated from outside.
Claim 16
Dependent Claim
87 words
A method as claimed in claim 10, characterized in that conduits are formed to pass the sample of the anhydride to be detected into contact with said detection electrode by boring substantially parallel channels through a solid body, by forming a passage at one extremity of the solid body so as to allow a gas communication between said channels, by registering said passage with the detection electrode and heating the electrolyte element at a temperature so as to embed slightly the solid body into the electrolyte element.
References Cited (Backward Citations)
No citation records indexed.
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