1.1.2 Preliminary Study on Catalytic Combustion-type Sensor for Diesel Particulate Matter Detection
- 14th International Meeting on Chemical Sensors - IMCS 2012
2012-05-20 - 2012-05-23
- 1.1 High Temperature Gas Sensors I
- Y. Teraoka, C. Lim, H. Einaga - Department of Energy and Material Sciences, Faculty of Engineering Sciences, Kyushu University (Japan), Y. Sadaoka - Department of Materials Science and Biotechnology, Graduate School of Science and Engineering, Ehime University (Japan)
- 64 - 67
Ag/TiO2 and Pt/TiO2 catalysts were active for combustion of soot above 500 °C and for soluble organic fraction (SOF) below 200 °C, respectively. Sensing characteristics of catalytic combustion-type sensors coated with these catalysts against diesel particulate matter (PM), especially selective sensing of soluble organic fraction (SOF) and soot, were evaluated by the programmed heating of the PM-loaded sensing elements. The Pt/TiO2 coated sensing element gave the signal due to SOF oxidation around 150-200 °C, while the selective detection of soot was possible with the Ag/TiO2 coated sensor. Results obtained here strongly suggest the possibilities to construct the catalytic combustion-type PM sensor and to selectively detect SOF and soot by the proper selection of the catalytic materials and operation temperatures.