Kinetics of NO reduction by CO on quartz glass surfaces

Berger, Andreas; Rotzoll, G.

doi:10.1016/0016-2361(95)93481-r

Cited by 20 publications

(13 citation statements)

References 6 publications

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“…However, it appears that while its thermally activated desorption is inhibited, the interaction with CO is not. This is supported by the findings of Berger and Rotzoll, who demonstrated that CO oxidation on glass surfaces is a possible mechanism [ 62 ]. Due to the high surface area compared to the tube walls, this process takes place primarily on the surface of the glass wool.…”

Section: Results and Discussionsupporting

confidence: 78%

Evaluation of Indium Tin Oxide for Gas Sensing Applications: Adsorption/Desorption and Electrical Conductivity Studies on Powders and Thick Films

Dietrich

Kusnezoff

Petasch

et al. 2021

Sensors

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By combining results of adsorption/desorption measurements on powders and electrical conductivity studies on thick and thin films, the interaction of indium tin oxide with various ambient gas species and carbon monoxide as potential target gas was studied between room temperature and 700 °C. The results show that the indium tin oxide surfaces exhibit a significant coverage of water-related and carbonaceous adsorbates even at temperatures as high as 600 °C. Specifically carbonaceous species, which are also produced under carbon monoxide exposure, show a detrimental effect on oxygen adsorption and may impair the film’s sensitivity to a variety of target gases if the material is used in gas sensing applications. Consequently, the operating temperature of an ITO based chemoresistive carbon monoxide sensor should be selected within a range where the decomposition and desorption of these species proceeds rapidly, while the surface oxygen coverage is still high enough to provide ample species for target gas interaction.

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Section: Results and Discussionsupporting

confidence: 78%

Evaluation of Indium Tin Oxide for Gas Sensing Applications: Adsorption/Desorption and Electrical Conductivity Studies on Powders and Thick Films

Dietrich

Kusnezoff

Petasch

et al. 2021

Sensors

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“…There have been many reports concerning the catalysis of (R3) by various types of surfaces, including quartz, , impure quartz sands, calcined limestone and dolomite, − sulfided limestone, transition-metal oxides, other mixed catalysts, , carbon-supported transition metals, , and carbon-supported alkali . It has also been reported that coal ash has low catalytic activity and CFBC bed ash can have high activity .…”

Section: Introductionmentioning

confidence: 99%

The Role of Carbon Monoxide in the NO−Carbon Reaction

1999

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The enhancement of the NO/carbon reduction reactions by carbon monoxide has been demonstrated for carbons of widely varying nature (coal char, phenolic resin-derived char and graphite). The evidence supports enhancement of NO reduction via a carbon-surface-catalyzed reaction such as NO + CO → 1/2N2 + CO2. This reaction appears to be characterized by an activation energy of around 116 kJ/mol, and by zero order with respect to CO, in the range of CO pressures examined here (up to order 500 ppm). This suggests that an oxide stripping reaction, e.g., CO + C(O) → CO2 + C*, cannot be invoked in its usual form, to explain the rate enhancement. The reaction appears to be first order with respect to NO, at high temperatures and at NO concentrations of above roughly 100 ppm, but kinetic analysis is complicated by the fact that the NO−carbon reaction itself does not have a unique order at low temperatures. It is also shown that kinetic analysis can be greatly complicated in the presence of other oxidizing gases or surface oxides deposited by these gases.

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“…The study of the soot-NO reaction in the presence of CO was performed at 1373 K. Depending on the conditions of temperature and CO concentration, quartz has been reported to present catalytic activity in the reduction of nitric oxide by carbon monoxide, following the same scheme showed in reaction (7) [26][27][28]. Therefore, a previous test was performed to check whether the quartz wool, silica sand particles and the quartz reactor used in this work were inert under the reaction conditions employed.…”

Section: Methodsmentioning

confidence: 99%