The Experts below are selected from a list of 270 Experts worldwide ranked by ideXlab platform
Tokafumi Oshima - One of the best experts on this subject based on the ideXlab platform.
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NOx detection using the electrolysis of water vapor in a YSZ cell : Part II. Electrochemical oxygen pump
Solid State Ionics, 1998Co-Authors: Takashi Hibino, Yoshitaka Kuwahara, T Otsuka, Noboru Ishida, Tokafumi OshimaAbstract:Abstract The detection of NO in the presence of excess oxygen has been carried out using four electrochemical cells, Pt|YSZ|Pt, which serve as an electrochemical pumping cell, an electrolysis cell and two oxygen sensors, respectively. Their operation temperature was 800°C. A mixture of 0–2500 ppm NO, 1–7% oxygen, 3–10% water vapor and 0–10% carbon dioxide in argon was used as a Sample Gas. At the electrochemical pumping cell, oxygen in the Sample Gas was removed down to a constant concentration of 1800 ppm, which was monitored by the oxygen sensor. At the electrolysis cell, water vapor in the Sample Gas was electrolyzed, and the resulting hydrogen reacted with NO in the Sample Gas. Finally, the Sample Gas was fed into another oxygen sensor. Two potentiometric and amperometric methods were adopted to detect NO. In the potentiometric method, the EMF value of the oxygen sensor decreased with increasing NO concentration. In the amperometric method, the current applied to the electrolysis cell was proportional to the concentration of NO. Additionally, the influences of the coexisting oxygen, water vapor and carbon dioxide in the Sample Gas on the detection of NO were investigated in detail.
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NOx detection using the electrolysis of water vapour in a YSZ cell: Part I. NOx detection
Solid State Ionics, 1998Co-Authors: Takashi Hibino, Yoshitaka Kuwahara, T Otsuka, Noboru Ishida, Tokafumi OshimaAbstract:Abstract The reaction of NO with the hydrogen formed by electrolyzing water vapour in a YSZ cell has been applied to detect NO with output signal of magnitude in millivolt or milliampere. The experimental apparatus consisted of two YSZ cells, Pt|YSZ|Pt, which served as an electrolysis cell and an oxygen sensor, respectively. A mixture of 0–3000 ppm NO and 3% H 2 O in argon was successively fed to the two cells at 800°C. In the upstream cell, the hydrogen formed by electrolyzing water vapour in the Sample Gas reacted with NO in the Sample Gas. In the downstream cell, the electromotive force (EMF) value was measured using air as a reference Gas. The EMF value of the oxygen sensor was used as a sensor signal, when a current of 6.7 mA was applied to the electrolysis cell. The EMF signal decreased with increasing NO concentration in the Sample Gas. Furthermore, the current applied to the electrolysis cell was used as another sensor signal, when the EMF value of the oxygen sensor was held at 700 mV. The current signal increased with increasing NO concentration in the Sample Gas.
Takashi Hibino - One of the best experts on this subject based on the ideXlab platform.
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NOx detection using the electrolysis of water vapor in a YSZ cell : Part II. Electrochemical oxygen pump
Solid State Ionics, 1998Co-Authors: Takashi Hibino, Yoshitaka Kuwahara, T Otsuka, Noboru Ishida, Tokafumi OshimaAbstract:Abstract The detection of NO in the presence of excess oxygen has been carried out using four electrochemical cells, Pt|YSZ|Pt, which serve as an electrochemical pumping cell, an electrolysis cell and two oxygen sensors, respectively. Their operation temperature was 800°C. A mixture of 0–2500 ppm NO, 1–7% oxygen, 3–10% water vapor and 0–10% carbon dioxide in argon was used as a Sample Gas. At the electrochemical pumping cell, oxygen in the Sample Gas was removed down to a constant concentration of 1800 ppm, which was monitored by the oxygen sensor. At the electrolysis cell, water vapor in the Sample Gas was electrolyzed, and the resulting hydrogen reacted with NO in the Sample Gas. Finally, the Sample Gas was fed into another oxygen sensor. Two potentiometric and amperometric methods were adopted to detect NO. In the potentiometric method, the EMF value of the oxygen sensor decreased with increasing NO concentration. In the amperometric method, the current applied to the electrolysis cell was proportional to the concentration of NO. Additionally, the influences of the coexisting oxygen, water vapor and carbon dioxide in the Sample Gas on the detection of NO were investigated in detail.
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NOx detection using the electrolysis of water vapour in a YSZ cell: Part I. NOx detection
Solid State Ionics, 1998Co-Authors: Takashi Hibino, Yoshitaka Kuwahara, T Otsuka, Noboru Ishida, Tokafumi OshimaAbstract:Abstract The reaction of NO with the hydrogen formed by electrolyzing water vapour in a YSZ cell has been applied to detect NO with output signal of magnitude in millivolt or milliampere. The experimental apparatus consisted of two YSZ cells, Pt|YSZ|Pt, which served as an electrolysis cell and an oxygen sensor, respectively. A mixture of 0–3000 ppm NO and 3% H 2 O in argon was successively fed to the two cells at 800°C. In the upstream cell, the hydrogen formed by electrolyzing water vapour in the Sample Gas reacted with NO in the Sample Gas. In the downstream cell, the electromotive force (EMF) value was measured using air as a reference Gas. The EMF value of the oxygen sensor was used as a sensor signal, when a current of 6.7 mA was applied to the electrolysis cell. The EMF signal decreased with increasing NO concentration in the Sample Gas. Furthermore, the current applied to the electrolysis cell was used as another sensor signal, when the EMF value of the oxygen sensor was held at 700 mV. The current signal increased with increasing NO concentration in the Sample Gas.
Jörg Schamar - One of the best experts on this subject based on the ideXlab platform.
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AGT Thermotechnik - BCR Sample Gas Coolers
2016Co-Authors: Jörg SchamarAbstract:BCRs are the allround talents among compressor coolers. They are installed in all applications where pure coolers are needed without additional conditioning equipment. BCR Sample Gas coolers can be optionally equipped with PVDF-, glass- and/or stainless-steel-heat-exchangers. Thus BCR Sample Gas coolers can cool down nearly every Gaseous medium. The coolers are also very suitable for high Gas flow rates and extrem high inlet temperatures. Even for operation in explosive atmosphere ATEX zones 1 and 2 BCR offers high performant systems.
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AGT Thermotechnik - Product Program Sample Gas
2016Co-Authors: Jörg SchamarAbstract:Sample Gas conditioning: Conditioning of Sample Gas flows to feed analyzers with clean and dry Sample Gas. For continuous emission monitoring CEM and process monitoring in power plants, cement plants, chemical production plants, waste incinerators, glass manufacturing, timber processing, food processing and motor test benches.
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AGT Thermotechnik - Compressed Air and Sample Gas Conditioning: Compressed Air Dryers, Sample Gas Coolers
2016Co-Authors: Jörg SchamarAbstract:AGT Thermotechnik engineers, manufactures, sales und maintains Sample Gas coolers and compressed air dryers for a Sample Gas and compressed air conditioning of cetified best quality.
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Sample Gas Analysis / Stack Gas Analysis - AGT Thermotechnik
2016Co-Authors: Jörg SchamarAbstract:Exact Sample Gas analysis by optimized Gas conditioning: Conditioning of Sample Gas flows to feed analyzers with clean and dry Sample Gas. For continuous emission monitoring CEM and process monitoring in power plants, cement plants, chemical production plants, waste incinerators, glass manufacturing, timber processing, food processing and motor test benches.
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AGT Thermotechnik - Products Sample Gas
2016Co-Authors: Jörg SchamarAbstract:Sample Gas conditioning: Conditioning of Sample Gas flows to feed analyzers with clean and dry Sample Gas. For continuous emission monitoring CEM and process monitoring in power plants, cement plants, chemical production plants, waste incinerators, glass manufacturing, timber processing, food processing and motor test benches.
Satoshi Nakata - One of the best experts on this subject based on the ideXlab platform.
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discrimination and quantification of flammable Gases with a sno2 sniffing sensor
Analyst, 2000Co-Authors: Satoshi Nakata, Tomoko Nakamura, Kimiko Kato, You Kato, Kenichi YoshikawaAbstract:Sample Gases (methane, ethane, propane, CO, and ethylene) can be quantitatively and qualitatively distinguished using an artificial ‘sniffing’ system based on the nonlinear dynamic response of a SnO2 semiconductor Gas sensor. In this system, the Sample Gas is periodically blown onto the sensor using an electric fan, and the resulting output conductance of the sensor is analyzed by complex fast Fourier transformation (FFT). The higher harmonics of the complex FFT characterize the time-dependent nonlinear properties of the response depending on the Gas species. The nonlinear dynamic response using this ‘sniffing’ system is discussed in terms of the kinetics of the Gas species at the sensor surface.
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Detection of a Sample Gas in the presence of an interferant Gas based on a nonlinear dynamic response
Sensors and Actuators B-chemical, 1999Co-Authors: Satoshi Nakata, Nozomi OjimaAbstract:Abstract A Sample Gas was quantitatively distinguished based on the nonlinear dynamic response of a SnO 2 semiconductor Gas sensor, even in the presence of water vapor. A sinusoidal temperature change was applied to the sensor, and the resulting output conductance of the sensor was analyzed by fast Fourier transformation (FFT). The higher harmonics of the FFT characterized the nonlinear properties of the response. We found that the dynamic nonlinear responses under the influence of water vapor consist of individual responses to a Sample Gas and water vapor and that it is possible to determine the concentrations of both the Sample Gas and water vapor based on the amplitudes of the higher harmonics of the FFT.
Noboru Ishida - One of the best experts on this subject based on the ideXlab platform.
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NOx detection using the electrolysis of water vapor in a YSZ cell : Part II. Electrochemical oxygen pump
Solid State Ionics, 1998Co-Authors: Takashi Hibino, Yoshitaka Kuwahara, T Otsuka, Noboru Ishida, Tokafumi OshimaAbstract:Abstract The detection of NO in the presence of excess oxygen has been carried out using four electrochemical cells, Pt|YSZ|Pt, which serve as an electrochemical pumping cell, an electrolysis cell and two oxygen sensors, respectively. Their operation temperature was 800°C. A mixture of 0–2500 ppm NO, 1–7% oxygen, 3–10% water vapor and 0–10% carbon dioxide in argon was used as a Sample Gas. At the electrochemical pumping cell, oxygen in the Sample Gas was removed down to a constant concentration of 1800 ppm, which was monitored by the oxygen sensor. At the electrolysis cell, water vapor in the Sample Gas was electrolyzed, and the resulting hydrogen reacted with NO in the Sample Gas. Finally, the Sample Gas was fed into another oxygen sensor. Two potentiometric and amperometric methods were adopted to detect NO. In the potentiometric method, the EMF value of the oxygen sensor decreased with increasing NO concentration. In the amperometric method, the current applied to the electrolysis cell was proportional to the concentration of NO. Additionally, the influences of the coexisting oxygen, water vapor and carbon dioxide in the Sample Gas on the detection of NO were investigated in detail.
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NOx detection using the electrolysis of water vapour in a YSZ cell: Part I. NOx detection
Solid State Ionics, 1998Co-Authors: Takashi Hibino, Yoshitaka Kuwahara, T Otsuka, Noboru Ishida, Tokafumi OshimaAbstract:Abstract The reaction of NO with the hydrogen formed by electrolyzing water vapour in a YSZ cell has been applied to detect NO with output signal of magnitude in millivolt or milliampere. The experimental apparatus consisted of two YSZ cells, Pt|YSZ|Pt, which served as an electrolysis cell and an oxygen sensor, respectively. A mixture of 0–3000 ppm NO and 3% H 2 O in argon was successively fed to the two cells at 800°C. In the upstream cell, the hydrogen formed by electrolyzing water vapour in the Sample Gas reacted with NO in the Sample Gas. In the downstream cell, the electromotive force (EMF) value was measured using air as a reference Gas. The EMF value of the oxygen sensor was used as a sensor signal, when a current of 6.7 mA was applied to the electrolysis cell. The EMF signal decreased with increasing NO concentration in the Sample Gas. Furthermore, the current applied to the electrolysis cell was used as another sensor signal, when the EMF value of the oxygen sensor was held at 700 mV. The current signal increased with increasing NO concentration in the Sample Gas.
