DE2509218A1 - Heat tone analysis appts. for gases - has thermometer array in conical reaction chamber with peroxide catalyst - Google Patents

Heat tone analysis appts. for gases - has thermometer array in conical reaction chamber with peroxide catalyst

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Publication number
DE2509218A1
DE2509218A1 DE19752509218 DE2509218A DE2509218A1 DE 2509218 A1 DE2509218 A1 DE 2509218A1 DE 19752509218 DE19752509218 DE 19752509218 DE 2509218 A DE2509218 A DE 2509218A DE 2509218 A1 DE2509218 A1 DE 2509218A1
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Germany
Prior art keywords
catalytic
catalyst
gases
heat tone
temp
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.)
Pending
Application number
DE19752509218
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German (de)
Inventor
Auf Nichtnennung Antrag
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
HIRTH MICHAEL DIPL ING
Original Assignee
HIRTH MICHAEL DIPL ING
Priority date (The priority date 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 date listed.)
Filing date
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Application filed by HIRTH MICHAEL DIPL ING filed Critical HIRTH MICHAEL DIPL ING
Priority to DE19752509218 priority Critical patent/DE2509218A1/en
Publication of DE2509218A1 publication Critical patent/DE2509218A1/en
Pending legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N25/00—Investigating or analyzing materials by the use of thermal means
    • G01N25/20—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity
    • G01N25/22—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity on combustion or catalytic oxidation, e.g. of components of gas mixtures
    • G01N25/28—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity on combustion or catalytic oxidation, e.g. of components of gas mixtures the rise in temperature of the gases resulting from combustion being measured directly
    • G01N25/30—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity on combustion or catalytic oxidation, e.g. of components of gas mixtures the rise in temperature of the gases resulting from combustion being measured directly using electric temperature-responsive elements
    • G01N25/32—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity on combustion or catalytic oxidation, e.g. of components of gas mixtures the rise in temperature of the gases resulting from combustion being measured directly using electric temperature-responsive elements using thermoelectric elements

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)

Abstract

The gas analysis appts. consists of an elongated housing with a central tube through which the gases are passed. The inner tube has a central conical construction. The inlet ports and outlet ports have several temp. sensors placed along their length to detect the temp. gradient of the incoming and outgoing gas flow. For ozone analysis, a catalyst of 'Hopcalite' peroxide mixt. is used with a dessicant of silica gel to reduce water vapour contamination. The heat tone measurement is obtd. from the temp. difference observed in the gas flow before and after the catalytic reaction.

Description

Katalytischer Wärmetönungsmesser zur GasanalyseCatalytic catalytic catalytic converter for gas analysis

Erfinder: Michael HirthInventor: Michael Hirth

Katalytische Wärmetönungsmesser zur Gasanalyse sind seit langem bekannt. (1) Das zu analysierende Gasgemisch wird dabei über einen festen Katalysator geleitet, dort tritt die Reaktion mit der Wärme tönung ein, die Temperaturerhöhung am Katalysator ist ein Maß für die Zusammensetzung des eintretenden Gasgemisches (Bild .1).Catalytic catalytic meters for gas analysis have been around for a long time known. (1) The gas mixture to be analyzed is passed over a solid catalyst, where it reacts with the heat tint, the increase in temperature on the catalytic converter is a measure of the composition of the gas mixture entering (Fig. 1).

Strömt nun der Volumenstrom Q durch das Gerät, entsteht dort mit der Wärmetönung r in der Zeiteinheit die Wärme r«Q. Diese Wärme ist nach dem Energieerhaltungssatz gleich der abströmenden Wärmeenergie Q'C'D und der an die Wand des Katalysatorgefässes abgeleiteten Wärme k· D (c spezifische Wärme des Gases, D Temperaturunterschied zwischen Gasein und -austritt, k Wärmeübergang an die Wand).If the volume flow Q now flows through the device, the heat r «Q arises there with the heat tone r in the unit of time. This warmth is, according to the law of conservation of energy, equal to the outflowing thermal energy Q'C'D and that which is dissipated on the wall of the catalyst vessel Heat k · D (c specific heat of the gas, D temperature difference between gas inlet and outlet, k heat transfer to the Wall).

Für die Temperaturerhöhung im stationären Zustand gilt damit:The following applies to the temperature increase in the steady state:

Man erkennt sofort, daß die Temperaturerhöhung vom Volumenstrom Q abhängig ist. Die Verwendung des Gerätes wird nun sehr kompliziert, wenn z.B. eine Regelung des Gasdurchflusses vorgesehen werden muß. Auch ein hoher Gasstrom, bei dem dann die Wärmeverluste an die Wand vernachlässigbar werden, führt bei den meisten Anwendungen zu unzulässig hohen Verlusten.It can be seen immediately that the temperature increase is dependent on the volume flow Q. The use of the device is now very complicated, if, for example, a regulation of the gas flow has to be provided. Also a high gas flow, in which the heat losses to the Wall become negligible, leads to inadmissibly high losses in most applications.

Hier setzt nun der Erfindungsgedanke ein:This is where the idea of the invention comes in:

Die Rechnung und Messung des Temperaturprofils längs der Katalysatorfüllung zeigen, daß die Temperaturerhöhung der Meßeffekte weitgehend unabhängig vom Durchfluß sein wird, wenn der Behälter für den Katalysator konisch und die Temperatur des Katalysators nicht an einer ausgewählten Stelle, sondern an mehreren Stellen längs der Katalysatorfüllung gemessen und gemittelt wird (Bild 2).The calculation and measurement of the temperature profile along the catalyst filling show that the temperature increase of the measuring effects will be largely independent of the flow rate if the container for the catalyst conical and the temperature of the catalyst not at a selected point, but at several points along the Catalyst filling is measured and averaged (Fig. 2).

609 8 38/03 57609 8 38/03 57

• Λ-• Λ-

25032182503218

Das Gerät wurde zur Ozonmessung von Ozongeneratoren verwendet. Daraus ergeben sich weitere Patentansprüche.The device was used to measure ozone from ozone generators. This gives rise to further patent claims.

Als Katalysator hat sich das Oxyd-Peroxydgemisch "Hopcalit" bewährt. The oxide-peroxide mixture "Hopcalite" has proven itself as a catalyst.

Allerdings muß der Katalysator durch eine geeignete Vorlage, hier Silica-Gel, vor Wasserdampf und Stickoxyden geschützt werden.However, the catalyst must be protected from water vapor and nitrogen oxides by a suitable template, in this case silica gel.

Claims (4)

Patentansprüche:Patent claims: 1))Katalytischer Wärmetönungsmesser zur Gasanalyse dadurch gekennzeichnet, daß der Behälter für den Katalysator in Strömungsrichtung einen abnehmenden Querschnitt aufweist. 1)) Catalytic catalytic killer for gas analysis characterized in that that the container for the catalyst has a decreasing cross section in the direction of flow. 2) Katalytischer Wärmetönungsmesser zur Gasanalyse dadurch gekennzeichnet, daß die Wärmetönung vor und nach der Reaktion mit einer Thermokette gemessen und die Temperatur des Katalysators an mehr als einer Stelle entlang der Strömungsrichtung des zu analysierenden Gases als Mittelwert erfaßt wird.2) catalytic catalytic catalytic converter for gas analysis characterized in that that the exothermicity measured before and after the reaction with a thermal chain and the temperature of the catalyst is recorded as an average value at more than one point along the direction of flow of the gas to be analyzed. 3) Katalytischer Wärmetönungsmesser zur Ozonmessung nach Anspruch und 2 dadurch gekennzeichnet, daß als Katalysator Hopkalite verwendet wird.3) catalytic heat tone meter for measuring ozone according to claim and 2, characterized in that hopcalite is used as a catalyst will. 4) Katalytischer Wärmetönungsmesser nach Anspruch 1 bis 3 dadurch gekennzeichnet, daß als die Ozonkonzentration nicht schädigende Vorlage Silica-Gel verwendet wird.4) catalytic heat tone meter according to claim 1 to 3, characterized in that as the ozone concentration is not damaging Template silica gel is used. Karlsruhe, 25.2.1975Karlsruhe, February 25, 1975 (1) J. Hengstenberg, B. Sturm, O. Winkler: Messen und Regeln in der chemischen Technik. Springer-Verlag Berlin, 1964.(1) J. Hengstenberg, B. Sturm, O. Winkler: Measurement and control in chemical engineering. Springer-Verlag Berlin, 1964. 809838/0357809838/0357
DE19752509218 1975-03-04 1975-03-04 Heat tone analysis appts. for gases - has thermometer array in conical reaction chamber with peroxide catalyst Pending DE2509218A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19752509218 DE2509218A1 (en) 1975-03-04 1975-03-04 Heat tone analysis appts. for gases - has thermometer array in conical reaction chamber with peroxide catalyst

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19752509218 DE2509218A1 (en) 1975-03-04 1975-03-04 Heat tone analysis appts. for gases - has thermometer array in conical reaction chamber with peroxide catalyst

Publications (1)

Publication Number Publication Date
DE2509218A1 true DE2509218A1 (en) 1976-09-16

Family

ID=5940345

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19752509218 Pending DE2509218A1 (en) 1975-03-04 1975-03-04 Heat tone analysis appts. for gases - has thermometer array in conical reaction chamber with peroxide catalyst

Country Status (1)

Country Link
DE (1) DE2509218A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2393301A1 (en) * 1977-02-18 1978-12-29 Messer Griesheim Gmbh METHOD AND DEVICE FOR DETERMINING THE OZONE CONTENT OF GASEOUS MIXTURES CONTAINING OZONE
FR2678383A1 (en) * 1991-06-27 1992-12-31 Fondis Sa Detector/catalyst of non-burnt residues for gases and fumes resulting from combustion or present in an atmosphere

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2393301A1 (en) * 1977-02-18 1978-12-29 Messer Griesheim Gmbh METHOD AND DEVICE FOR DETERMINING THE OZONE CONTENT OF GASEOUS MIXTURES CONTAINING OZONE
FR2678383A1 (en) * 1991-06-27 1992-12-31 Fondis Sa Detector/catalyst of non-burnt residues for gases and fumes resulting from combustion or present in an atmosphere

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