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Calorimetric Thermoelectric Gas Sensor for the Detection of Hydrogen, Methane and Mixed Gases

A novel miniaturized calorimeter-type sensor device with a dual-catalyst structure was fabricated by integrating different catalysts on the hot (Pd/θ-Al(2)O(3)) and cold (Pt/α-Al(2)O(3)) ends of the device. The device comprises a calorimeter with a thermoelectric gas sensor (calorimetric-TGS), combi...

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Autores principales: Park, Nam-Hee, Akamatsu, Takafumi, Itoh, Toshio, Izu, Noriya, Shin, Woosuck
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Molecular Diversity Preservation International (MDPI) 2014
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4063010/
https://www.ncbi.nlm.nih.gov/pubmed/24818660
http://dx.doi.org/10.3390/s140508350
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author Park, Nam-Hee
Akamatsu, Takafumi
Itoh, Toshio
Izu, Noriya
Shin, Woosuck
author_facet Park, Nam-Hee
Akamatsu, Takafumi
Itoh, Toshio
Izu, Noriya
Shin, Woosuck
author_sort Park, Nam-Hee
collection PubMed
description A novel miniaturized calorimeter-type sensor device with a dual-catalyst structure was fabricated by integrating different catalysts on the hot (Pd/θ-Al(2)O(3)) and cold (Pt/α-Al(2)O(3)) ends of the device. The device comprises a calorimeter with a thermoelectric gas sensor (calorimetric-TGS), combining catalytic combustion and thermoelectric technologies. Its response for a model fuel gas of hydrogen and methane was investigated with various combustor catalyst compositions. The calorimetric-TGS devices detected H(2), CH(4), and a mixture of the two with concentrations ranging between 200 and 2000 ppm at temperatures of 100–400 °C, in terms of the calorie content of the gases. It was necessary to reduce the much higher response voltage of the TGS to H(2) compared to CH(4). We enhanced the H(2) combustion on the cold side so that the temperature differences and response voltages to H(2) were reduced. The device response to H(2) combustion was reduced by 50% by controlling the Pt concentration in the Pt/α-Al(2)O(3) catalyst on the cold side to 3 wt%.
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spelling pubmed-40630102014-06-19 Calorimetric Thermoelectric Gas Sensor for the Detection of Hydrogen, Methane and Mixed Gases Park, Nam-Hee Akamatsu, Takafumi Itoh, Toshio Izu, Noriya Shin, Woosuck Sensors (Basel) Article A novel miniaturized calorimeter-type sensor device with a dual-catalyst structure was fabricated by integrating different catalysts on the hot (Pd/θ-Al(2)O(3)) and cold (Pt/α-Al(2)O(3)) ends of the device. The device comprises a calorimeter with a thermoelectric gas sensor (calorimetric-TGS), combining catalytic combustion and thermoelectric technologies. Its response for a model fuel gas of hydrogen and methane was investigated with various combustor catalyst compositions. The calorimetric-TGS devices detected H(2), CH(4), and a mixture of the two with concentrations ranging between 200 and 2000 ppm at temperatures of 100–400 °C, in terms of the calorie content of the gases. It was necessary to reduce the much higher response voltage of the TGS to H(2) compared to CH(4). We enhanced the H(2) combustion on the cold side so that the temperature differences and response voltages to H(2) were reduced. The device response to H(2) combustion was reduced by 50% by controlling the Pt concentration in the Pt/α-Al(2)O(3) catalyst on the cold side to 3 wt%. Molecular Diversity Preservation International (MDPI) 2014-05-09 /pmc/articles/PMC4063010/ /pubmed/24818660 http://dx.doi.org/10.3390/s140508350 Text en © 2014 by the authors; licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/3.0/).
spellingShingle Article
Park, Nam-Hee
Akamatsu, Takafumi
Itoh, Toshio
Izu, Noriya
Shin, Woosuck
Calorimetric Thermoelectric Gas Sensor for the Detection of Hydrogen, Methane and Mixed Gases
title Calorimetric Thermoelectric Gas Sensor for the Detection of Hydrogen, Methane and Mixed Gases
title_full Calorimetric Thermoelectric Gas Sensor for the Detection of Hydrogen, Methane and Mixed Gases
title_fullStr Calorimetric Thermoelectric Gas Sensor for the Detection of Hydrogen, Methane and Mixed Gases
title_full_unstemmed Calorimetric Thermoelectric Gas Sensor for the Detection of Hydrogen, Methane and Mixed Gases
title_short Calorimetric Thermoelectric Gas Sensor for the Detection of Hydrogen, Methane and Mixed Gases
title_sort calorimetric thermoelectric gas sensor for the detection of hydrogen, methane and mixed gases
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4063010/
https://www.ncbi.nlm.nih.gov/pubmed/24818660
http://dx.doi.org/10.3390/s140508350
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