WO1996037771A1 - Sensoranordnung zum nachweis eines gases - Google Patents
Sensoranordnung zum nachweis eines gases Download PDFInfo
- Publication number
- WO1996037771A1 WO1996037771A1 PCT/DE1996/000833 DE9600833W WO9637771A1 WO 1996037771 A1 WO1996037771 A1 WO 1996037771A1 DE 9600833 W DE9600833 W DE 9600833W WO 9637771 A1 WO9637771 A1 WO 9637771A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- gas
- sensor arrangement
- sensor
- catalyst filter
- catalyst
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
- G01N33/0011—Sample conditioning
- G01N33/0013—Sample conditioning by a chemical reaction
Definitions
- the invention relates to a sensor arrangement for the detection of a gas.
- a sensor arrangement with a gas sensor and a catalyst for the detection of gaseous compounds is known.
- This sensor arrangement has a catalytic converter which is spatially separated from the gas sensor.
- the catalytic converter serves for the connection to be detected to be split by a catalytic reaction.
- a split either an element detectable by the gas sensor or a connecting fragment, of which detects a detectable element on the gas sensor surface. This means that the gases to be measured are processed by the catalyst to such an extent that they can be detected by the gas sensor.
- a measuring device for analyzing a gas mixture is known from EP 0 305 963 A1. During the measurement, the gas mixture is broken down into conversion products using a heated catalyst element, which are detected by means of a gas sensor which detects at least one of the conversion products.
- the gas components to be detected are processed to such an extent that they can be detected by the gas sensor. Any additional gas components present are not taken into account in the above-mentioned prior art.
- the object of the invention is a sensor arrangement for
- Figure 1 shows a first embodiment of the inventive sensor arrangement in longitudinal section.
- FIG. 2 shows a second embodiment of the sensor arrangement according to the invention in longitudinal section.
- Figure 3 shows a third embodiment of the sensor arrangement in cross section.
- Figure 4 shows a fourth embodiment of the sensor arrangement in cross section.
- FIG. 5 shows a diagram to illustrate the rate of degradation of ethanol as it passes through a chemically inert, heated filter with and without a palladium catalyst.
- FIG. 6 shows a diagram to illustrate the rate of degradation of methane when passing through a chemically inert filter with and without a palladium catalyst.
- FIG. A housing G has an inlet E and an outlet A.
- the gas to be analyzed flows through the inlet E of the housing G onto a catalyst filter K.
- the catalyst filter K causes disturbing gas components, such as, for example strongly reducing gases such as solvents, hydrocarbons or H2 or strongly oxidizing gases such as ozone are converted into non-interfering gas components. This can be done either by oxidizing the reducing gases or by reducing the oxidizing gases.
- the catalyst filter K is brought to its working temperature by a heater H. After the catalyst filter K, only those gas components occur that are to be detected or that have been converted by the catalyst filter K to such an extent that they are connected to the gas sensor GS1, which according to the
- Catalyst filter K is arranged, have no influence.
- Connection lines AL lead from the gas sensor GS1 through the housing G to a control and evaluation unit, not shown.
- FIG. 2 shows a second embodiment of the sensor arrangement according to the invention. This differs from the sensor arrangement shown in FIG. 1 in that a second gas sensor GS2 is arranged between the inlet E of the housing G and the catalyst filter K. Its connecting lines AL, like those of the first gas sensor GS1, lead to a control and evaluation unit (not shown). Such a sensor arrangement makes a differential measurement possible.
- the separate heater H for the catalyst filter K can be omitted.
- the catalyst filter K is heated by the heated gas sensor GSl.
- the heat emitted by the heated gas sensor GS is used to generate a convection gas flow.
- the flowing gas sweeps past the gas sensor GSl and exits through the outlet A in the housing G.
- the connecting lines AL of the gas sensor GSl are used both for the electrical connection to a control and evaluation unit (not shown) and for the positioning of the gas sensor GSl in the housing G.
- the separate heater H for the catalyst filter K can also be omitted.
- the catalyst filter K is arranged in an opening of the housing G.
- the gas sensor GS1 is arranged in the housing G adjacent to the catalyst filter K. In this construction variant, no conversion gas flow is used, but the gas enters the housing G by diffusion.
- the catalyst filter K has a grid provided with a catalyst, which is brought to the desired working temperature by the heated gas sensor GS.
- the connection lines AL serve both for the electrical connection to a control and evaluation unit (not shown) and for positioning the gas sensor GS1 with respect to the catalyst filter K.
- FIG. 5 shows the degradation rate for ethanol (C2H5O) with catalyst MK and without catalyst OK as a function of the intensity as a function of the temperature.
- Palladium serves as the catalyst.
- the temperature is given in ° C on the abscissa and the intensity in% on the ordinate.
- a temperature window between 540 and 650 ° C. must be maintained so that ethanol is degraded, but methane is not.
- the corresponding temperature range is between 160 and 380 ° C. The temperature window is thus not only significantly shifted towards lower temperatures, but also considerably wider.
- FIG. 6 shows the degradation rate for methane (CH4) with catalyst MK and without catalyst OK as a function of the intensity as a function of the temperature.
- the temperature is given on the abscissa and the intensity on the ordinate.
- an auxiliary gas can be supplied to which the gas sensor GS1 does not respond or only responds very weakly, which ches but selectively removes interfering gases by reaction on the catalyst filter K.
- a perforated diaphragm, an outflow nozzle which increases the flow rate or a sintered metal filter in the outlet A of the housing G can be used.
- the gas transport can be caused by a pump or by convection forces.
- Konvetions should be sure ⁇ utilized, so 'is to ensure that the Katalysator ⁇ filter K and the gas sensor GSI is superposed.
- Either a separate heater H or the heat of the gas sensor GS1 can be used to support the gas transport.
- Gas sensors which are preferably to be used are high-temperature gas sensors based on semiconducting metal oxides such as Ga2O3, Sr103, WO3, AIVO4 or BaSnO4.
- the operating temperature of a high temperature metal oxide sensor based on Ga2 ⁇ 3 is between 700 and 1000 ° C.
- a possible application of the sensor arrangement according to the invention is the detection of natural gas with simultaneous presence of alcohol in the household, for example in the kitchen.
- Areas of application for the sensor arrangement according to the invention are, for example: Detection of natural gas on a background of smellable gases (household, commercial) / reactive hydrocarbons (petrochemicals)
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Physics & Mathematics (AREA)
- Combustion & Propulsion (AREA)
- Food Science & Technology (AREA)
- Medicinal Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
- Investigating Or Analyzing Materials By The Use Of Fluid Adsorption Or Reactions (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8535254A JPH10506715A (ja) | 1995-05-24 | 1996-05-13 | ガス検出用センサ装置 |
EP96914077A EP0829009A1 (de) | 1995-05-24 | 1996-05-13 | Sensoranordnung zum nachweis eines gases |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19519189.7 | 1995-05-24 | ||
DE1995119189 DE19519189C1 (de) | 1995-05-24 | 1995-05-24 | Sensoranordnung zum Nachweis eines Gases |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1996037771A1 true WO1996037771A1 (de) | 1996-11-28 |
Family
ID=7762837
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE1996/000833 WO1996037771A1 (de) | 1995-05-24 | 1996-05-13 | Sensoranordnung zum nachweis eines gases |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0829009A1 (de) |
JP (1) | JPH10506715A (de) |
DE (1) | DE19519189C1 (de) |
WO (1) | WO1996037771A1 (de) |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19708770C1 (de) * | 1997-03-04 | 1998-08-27 | Siemens Ag | Gassensor |
WO2000077505A2 (en) * | 1999-06-15 | 2000-12-21 | Dart Sensors Limited | Carbon monoxide sensor |
DE10245947A1 (de) * | 2002-09-30 | 2004-04-08 | Eads Deutschland Gmbh | Mikrogasanalysesystem mit beheizbarem Filter und Verfahren zur Gasanalyse |
DE102005035932A1 (de) * | 2005-07-28 | 2007-02-08 | Endress + Hauser Conducta Gesellschaft für Mess- und Regeltechnik mbH + Co. KG | Optischer Sensor für in-situ Messungen |
DE102006035788A1 (de) * | 2006-07-28 | 2008-01-31 | Contros Systems & Solutions Gmbh | Vorrichtung zur Erfassung von Meßdaten |
DE102009000820A1 (de) * | 2009-02-12 | 2010-08-19 | Robert Bosch Gmbh | Sensorelement eines Gassensors und Verfahren zum Betrieb desselben |
DE202014005420U1 (de) * | 2014-07-02 | 2014-08-01 | Siemens Aktiengesellschaft | Sensorvorrichtung zur Analyse eines Gasgemischs in einem Prozessraum |
DE102013209469A1 (de) * | 2013-05-22 | 2014-11-27 | Siemens Aktiengesellschaft | Vorrichtung und Verfahren zum Erzeugen eines Gasstroms von einem Raum zu einem Gassensor |
DE102014203863A1 (de) * | 2014-03-04 | 2015-09-10 | Siemens Aktiengesellschaft | Sensor-Vorrichtung und Verfahren zur Analyse eines Gasgemischs in einem Prozessraum |
US20210278365A1 (en) * | 2020-03-05 | 2021-09-09 | Kabushiki Kaisha Toshiba | Molecule detecting device and molecule detecting method |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19808175C1 (de) * | 1998-02-26 | 1999-10-07 | Siemens Ag | Sensor und Verfahren zur selektiven, separaten Detektion von CO und/oder CH¶4¶ mit einen solchen neuen Sensor |
JP3959459B2 (ja) * | 1998-12-25 | 2007-08-15 | 独立行政法人産業技術総合研究所 | 触媒性能評価装置 |
DE102010036186A1 (de) * | 2010-09-02 | 2012-03-08 | Appliedsensor Gmbh | Verfahren und Vorrichtung zur Steigerung der Sensitivität und Selektivität einer Sensoreinrichtung |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5784341A (en) * | 1980-11-13 | 1982-05-26 | Nichicon Capacitor Ltd | Detector for trace of reducing gas dissolved in water |
JPS58221154A (ja) * | 1982-06-18 | 1983-12-22 | Hitachi Ltd | ガスセンサ素子 |
US4840913A (en) * | 1986-11-06 | 1989-06-20 | Ford Motor Company | Oxides of nitrogen detector |
EP0358925A2 (de) * | 1988-09-14 | 1990-03-21 | Seiko Co.,Ltd. | Sensor zum Nachweis von CO durch katalytische Verbrennung |
US5128268A (en) * | 1989-06-20 | 1992-07-07 | President And Fellows Of Harvard College | Halogen/charge-transfer complex gas monitor |
EP0517366A1 (de) * | 1991-06-07 | 1992-12-09 | Ford Motor Company Limited | Verfahren und Vorrichtung zur Bestimmung von Stickstoffoxiden |
EP0603945A1 (de) * | 1992-12-23 | 1994-06-29 | ENIRICERCHE S.p.A. | Gassensor basierend auf Halbleiteroxiden, zur Bestimmung von gasförmigen Kohlenwasserstoffen |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3729286A1 (de) * | 1987-09-02 | 1989-03-16 | Draegerwerk Ag | Messgeraet zur analyse eines gasgemisches |
DE4007375C2 (de) * | 1989-04-18 | 1998-05-07 | Siemens Ag | Sensoranordnung mit einem Gassensor und einem Katalysator zum Nachweis von gasförmigen Verbindungen |
-
1995
- 1995-05-24 DE DE1995119189 patent/DE19519189C1/de not_active Revoked
-
1996
- 1996-05-13 WO PCT/DE1996/000833 patent/WO1996037771A1/de not_active Application Discontinuation
- 1996-05-13 JP JP8535254A patent/JPH10506715A/ja active Pending
- 1996-05-13 EP EP96914077A patent/EP0829009A1/de not_active Withdrawn
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5784341A (en) * | 1980-11-13 | 1982-05-26 | Nichicon Capacitor Ltd | Detector for trace of reducing gas dissolved in water |
JPS58221154A (ja) * | 1982-06-18 | 1983-12-22 | Hitachi Ltd | ガスセンサ素子 |
US4840913A (en) * | 1986-11-06 | 1989-06-20 | Ford Motor Company | Oxides of nitrogen detector |
EP0358925A2 (de) * | 1988-09-14 | 1990-03-21 | Seiko Co.,Ltd. | Sensor zum Nachweis von CO durch katalytische Verbrennung |
US5128268A (en) * | 1989-06-20 | 1992-07-07 | President And Fellows Of Harvard College | Halogen/charge-transfer complex gas monitor |
EP0517366A1 (de) * | 1991-06-07 | 1992-12-09 | Ford Motor Company Limited | Verfahren und Vorrichtung zur Bestimmung von Stickstoffoxiden |
EP0603945A1 (de) * | 1992-12-23 | 1994-06-29 | ENIRICERCHE S.p.A. | Gassensor basierend auf Halbleiteroxiden, zur Bestimmung von gasförmigen Kohlenwasserstoffen |
Non-Patent Citations (2)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 006, no. 166 (P - 138) 31 August 1982 (1982-08-31) * |
PATENT ABSTRACTS OF JAPAN vol. 008, no. 075 (P - 266) 7 April 1984 (1984-04-07) * |
Cited By (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19708770C1 (de) * | 1997-03-04 | 1998-08-27 | Siemens Ag | Gassensor |
WO2000077505A2 (en) * | 1999-06-15 | 2000-12-21 | Dart Sensors Limited | Carbon monoxide sensor |
WO2000077505A3 (en) * | 1999-06-15 | 2001-05-17 | Dart Sensors Ltd | Carbon monoxide sensor |
DE10245947A1 (de) * | 2002-09-30 | 2004-04-08 | Eads Deutschland Gmbh | Mikrogasanalysesystem mit beheizbarem Filter und Verfahren zur Gasanalyse |
DE10245947B4 (de) * | 2002-09-30 | 2007-01-04 | Eads Deutschland Gmbh | Mikrogasanalysesystem mit beheizbarem Filter und Verfahren zur Gasanalyse |
DE102005035932A1 (de) * | 2005-07-28 | 2007-02-08 | Endress + Hauser Conducta Gesellschaft für Mess- und Regeltechnik mbH + Co. KG | Optischer Sensor für in-situ Messungen |
DE102006035788A1 (de) * | 2006-07-28 | 2008-01-31 | Contros Systems & Solutions Gmbh | Vorrichtung zur Erfassung von Meßdaten |
US8381572B2 (en) | 2006-07-28 | 2013-02-26 | Contros Systems & Solutions Gmbh | Device for recording measurement data |
DE102009000820A1 (de) * | 2009-02-12 | 2010-08-19 | Robert Bosch Gmbh | Sensorelement eines Gassensors und Verfahren zum Betrieb desselben |
US8833141B2 (en) | 2009-02-12 | 2014-09-16 | Robert Bosch Gmbh | Sensor element of a gas sensor and method for operating the same |
DE102013209469A1 (de) * | 2013-05-22 | 2014-11-27 | Siemens Aktiengesellschaft | Vorrichtung und Verfahren zum Erzeugen eines Gasstroms von einem Raum zu einem Gassensor |
DE102014203863A1 (de) * | 2014-03-04 | 2015-09-10 | Siemens Aktiengesellschaft | Sensor-Vorrichtung und Verfahren zur Analyse eines Gasgemischs in einem Prozessraum |
DE202014005420U1 (de) * | 2014-07-02 | 2014-08-01 | Siemens Aktiengesellschaft | Sensorvorrichtung zur Analyse eines Gasgemischs in einem Prozessraum |
US9791426B2 (en) | 2014-07-02 | 2017-10-17 | Siemens Aktiengesellschaft | Sensor apparatus for analyzing a gas mixture in a process chamber |
US20210278365A1 (en) * | 2020-03-05 | 2021-09-09 | Kabushiki Kaisha Toshiba | Molecule detecting device and molecule detecting method |
Also Published As
Publication number | Publication date |
---|---|
EP0829009A1 (de) | 1998-03-18 |
DE19519189C1 (de) | 1996-09-12 |
JPH10506715A (ja) | 1998-06-30 |
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