A fast-response catalytic sensor for flammable gases

Dabill, David W.; Gentry, Stephen J.; Walsh, PH

doi:10.1016/0250-6874(87)80012-4

Cited by 30 publications

(11 citation statements)

References 3 publications

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“…Metal additives such as platinum (Pt), gold (Au) or palladium (Pd) are catalysts that promote chemical reactions by reducing the activation energy between the films and the test gas resulting in high sensitivity and guaranteed stability [17,18]. Porous catalyst Pt/Pd dispersed on -alumina has been used to improve the poison resistance of the sensors [19,20]. The metals are used to increase the selectivity and the sensitivity of the sensor as well as reducing the response and recovery times [21].…”

Section: Introductionmentioning

confidence: 99%

A planar catalytic combustion sensor using nano-crystalline F-doped SnO2 as a supporting material for hydrogen detection

Han

Hong

Gwak

et al. 2007

Korean J. Chem. Eng.

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A planar catalytic combustion gas sensor based on Pd/Pt catalyst supported on F-doped SnO 2 nano-crystalline materials has been designed and fabricated for hydrogen detection. The sensor consists of platinum heaters on an alumina plate coated with a catalytic layer and compensating layer. This sensor exhibited better performance than that of the sensors employing sensing material of Pd/Pt catalyst on -Al 2 O 3 and of Pd/Pt catalyst on nano-crystalline SnO 2 . The detection limit of the sensor at 370 o C is in the concentration range of 0.5-5% (v/v), with an excellent linearity of signal voltage to the hydrogen gas concentration.

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Section: Introductionmentioning

confidence: 99%

A planar catalytic combustion sensor using nano-crystalline F-doped SnO2 as a supporting material for hydrogen detection

Han

Hong

Gwak

et al. 2007

Korean J. Chem. Eng.

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“…Calorimetric-type gas sensors have been used for decades to monitor the presence of combustible gases [1,2]. Originally, they were developed for early alarming of hazardous explosive gas mixtures, for example, in coal mines [3]. The vast technological development in the past 20 years has opened up a variety of fields for applications including detection of combustible gases, e.g., from automobiles [4]; however, the analysis of the gas components of a mixture is still in question [5].…”

Section: Introductionmentioning

confidence: 99%

Miniaturized Single Chip Arrangement of a Wheatstone Bridge Based Calorimetric Gas Sensor

et al. 2018

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The design and fabrication of a miniaturized calorimetric-type gas sensor in a single chip arrangement is presented. Active and passive thin-film Pt meanders are integrated in a single platform (7 × 7 mm 2 ) together with a temperature sensor and a thin-film microheater at the reverse side. Active meanders are covered by a porous Al 2 O 3 /2 wt % Pt thick-film layer. The selection of substrate, position of meanders, and active catalysts (especially their concentration) play a crucial role in directing sensor performance. The presented results show that the sensor signal (Wheatstone bridge voltage) is generated by diffusion-limited exothermic reactions which point towards catalytically enhanced combustion reactions mainly inside the active porous layer. By extrapolation of the linear sensitivity curves, the sensitivity limit was estimated to be 4 ppm for propene and to be 18 ppm for CO. In general, the one-chip-sensing concept has high potential to be used as a gas sensor for analysis of combustible gases; however, further optimization of the meander design and the catalyst material as well as investigations of the sensing behavior under varying ambient temperatures are necessary before such applications shall be considered.

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“…The catalytic combustion sensor is used for detection of hydrogen [1][2][3] in plants such as nuclear reactors and conventional power plants in the early approaches. It measures the oil concentration as a function of the temperature rise produced by heat of reaction on the catalytic surface.…”

Section: Introductionmentioning

confidence: 99%

Building output–input function of catalytic combustion sensor to diesel vapor

Lü

2010

Measurement

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A fast-response catalytic sensor for flammable gases

Cited by 30 publications

References 3 publications

A planar catalytic combustion sensor using nano-crystalline F-doped SnO2 as a supporting material for hydrogen detection

A planar catalytic combustion sensor using nano-crystalline F-doped SnO2 as a supporting material for hydrogen detection

Miniaturized Single Chip Arrangement of a Wheatstone Bridge Based Calorimetric Gas Sensor

Building output–input function of catalytic combustion sensor to diesel vapor

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