The interference elimination for gas sensor by catalyst filters

Kitsukawa, Shigeo; Nakagawa, Hidemoto; Fukuda, K.; Asakura, Shukuji; Takahashi, S; Shigemori, Tessi

doi:10.1016/s0925-4005(99)00463-3

Cited by 29 publications

(13 citation statements)

References 3 publications

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“…A chemically active zeolite filter that converted ethanol to C 2 H 4 decreased the interference from ethanol in CO detection by a resistive SnO 2 sensor [16]. Another example of a chemical filter is Nafion, which has also been found to discriminate against ethanol for CO detection by acid-catalyzed decomposition of ethanol [17].…”

Section: Introductionmentioning

confidence: 99%

Strategies for total NOx measurement with minimal CO interference utilizing a microporous zeolitic catalytic filter

Szabo

Dutta

2003

Sensors and Actuators B: Chemical

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Section: Introductionmentioning

confidence: 99%

Strategies for total NOx measurement with minimal CO interference utilizing a microporous zeolitic catalytic filter

Szabo

Dutta

2003

Sensors and Actuators B: Chemical

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“…An alternative solution that utilizes the employment of various catalytic filters is currently under investigation (5,6,16,17). The literature cited along with findings from this study suggests that the development of high temperature NOx sensors is an interdisciplinary area that combines the solid-state electrochemistry and heterogeneous catalysis.…”

Section: Solid State Electrochemical Sensor Technologiesmentioning

confidence: 91%

Sensors for Environmental Compliance of Diesel Engines

et al. 2008

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Nitrogen oxides generated from the combustion of fossil fuels contribute to ground level ozone formation and acid rain deposition. To minimize emissions the robust sensor technologies required. Solid-state electrochemical NOx and NH 3 sensors evaluated in this study showed significant cross-interference issues. In contrast, the semiconductor nanowires of Cu and Pb Pthtalocyanine and CdS thin films functionalized with Fe and Mn Porphyrines (Ph) exhibited negligible cross-interferences. The computational molecular modeling was utilized to analyze equilibrium structures and binding energies of O 2 , CO, NO, NH 3 , and these were shown to control the selectivity. The FePh exhibited the highest selectivity for NO (-190 kJ/mol), while MnPh was most selective to NH 3 (-46.7 kJ/mol). The binding energies of gas molecules to the hybrid Ph-CdS system were approximately 30 kJ/mol greater than binding to the Ph alone. Therefore, the semiconductor surface buried under the Ph layer enhanced sensitivity, but it did not alter the selectivity.

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“…Otherwise, it is possible to enhance the NO x selectivity by using an oxidation-catalyst electrode to oxide interferences and hence decrease cross-sensitivity from reducing gases [17]. The same effect can be reached if a catalyst is deposited before the gas mixture arrives to the sensing elements [18] and [19]. In the present work, it was opted to develop a planar potentiometric YSZ sensor with a catalytic filter directly deposited on the sensitive part of the sensor in order to meet the industrial demand of a robust, reliable NO x sensor with a simple configuration.…”

Section: Introductionmentioning

confidence: 99%

Improvement of the NO selectivity for a planar YSZ sensor

Gao

Viricelle

Pijolat

et al. 2011

Sensors and Actuators B: Chemical

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International audienceIn recent years planar yttria-stabilized zirconia (YSZ) based electrochemical gas sensors for automotive exhaust applications have become a major source of interest. The present work aims to develop a sensor for industrialisation. For this reason planar YSZ-based electrochemical sensors using two metallic electrodes (platinum and gold) were fabricated using screen-printing technology and tested in a laboratory test bench for different concentrations of pollutant gas such as CO, NO, NO2 and hydrocarbons in oxygen rich atmosphere. It was furthermore shown that the selectivity towards NOx could be highly reinforced by deposing a catalytic filter consisting of 1.7-4.5 wt.% Pt dispersed on alumina directly on the sensing elements. This filter was characterized by the use of SEM, TPD and XRD

show abstract

The interference elimination for gas sensor by catalyst filters

Cited by 29 publications

References 3 publications

Strategies for total NOx measurement with minimal CO interference utilizing a microporous zeolitic catalytic filter

Strategies for total NOx measurement with minimal CO interference utilizing a microporous zeolitic catalytic filter

Sensors for Environmental Compliance of Diesel Engines

Improvement of the NO selectivity for a planar YSZ sensor

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