Ozone decomposition on glass and silica

Ouederni, Abdelmottaleb; Limvorapituk, Q.; Bès, René; Mora, J.

doi:10.1080/01919512.1996.10382852

Cited by 21 publications

(9 citation statements)

References 7 publications

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“…These interactions become well known and documented (Schurath and Neumann, 2003). Further, ozone decomposition on mineral dust is altering the surface of dust particles (Dhandapani and Oyama, 1997;Ouerdeni et al, 1996), potentially influencing interactions with other trace gases (Hanisch and Crowley, 2003a).…”

Section: And Dementioning

confidence: 99%

Evolution of organic and inorganic components of aerosol during a Saharan dust episode observed in the French Alps

et al. 2004

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Abstract.A Saharan dust event was observed in a rural area in the Maurienne Valley (French Alps) in summer 2000. Detailed data on PM 10 , particle numbers, and aerosol chemistry (ionic species and Elemental Carbon (EC) and Organic Carbon (OC)) are presented. The comparative evolutions of particle numbers and chemistry (calcium, sodium, and sulfate) show that the overall period included two episodes of dust particles with very distinct chemistry, followed by an episode with a large increase of the concentrations of species with an anthropogenic origin. The overall data set does not indicate large interactions between the dust particles and compounds from anthropogenic origin (sulfate, nitrate) or with organic carbon, all of these species showing very low concentrations. Simplistic calculations indicate that these concentrations are consistent with our current knowledge of adsorption processes of gases on mineral dust in a clean air mass.

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Section: And Dementioning

confidence: 99%

Evolution of organic and inorganic components of aerosol during a Saharan dust episode observed in the French Alps

et al. 2004

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“…The catalytic destruction of O 3 has been subject of scientific interest for more than 40 years because of its toxicity (Ouederni et al, 1996;Dhandapani and Oyama, 1997). A number of studies have been performed on the adsorption of O 3 onto various mineral oxides, using electron paramagnetic resonance, infrared spectroscopy and kinetic measurement techniques (Dhandapani and Oyama, 1997).…”

Section: Introductionmentioning

confidence: 99%

Ozone decomposition on Saharan dust: an experimental investigation

2003

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Abstract. The heterogeneous reaction between O 3 and authentic Saharan dust surfaces was investigated in a Knudsen reactor at ≈ 296 K. O 3 was destroyed on the dust surface and O 2 was formed with conversion efficiencies of 1.0 and 1.3 molecules O 2 per O 3 molecule destroyed for unheated and heated samples, respectively. No O 3 desorbed from exposed dust samples, showing that the uptake was irreversible. The uptake coefficients for the irreversible destruction of O 3 on (unheated) Saharan dust surfaces depended on the O 3 concentration and varied between 3.5 × 10 −4 and 5.5 × 10 −6 for the initial uptake coefficient (γ 0 ≈ 3 × 10 −5 at 30 ppbv O 3 STP) and between 4.8 × 10 −5 and 2.2 × 10 −6 for the steady-state uptake coefficient (γ ss ≈ 7 × 10 −6 at 30 ppbv O 3 STP). At very high O 3 concentrations the surface was deactivated, and O 3 uptake ceased after a certain exposure period. Sample re-activation (i.e. de-passivation) was found to occur over periods of hours, after exposure to O 3 had ceased, suggesting that re-activation processes play a role both in the laboratory and in the atmosphere.

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“…Nonetheless, SiO 2 alone enhances the ozone decomposition. Even if the potential of SiO 2 alone as catalyst for heterogeneous ozone is not documented in the literature, its influence on the ozone decomposition has been already demonstrated [37]. The initiation of the ozone decomposition by silica and glass is attributed to collision, adsorption and/or energy effects.…”

Section: Evaluation Of Tio2 or Sio2-supported Ruthenium Nanocatalystsmentioning

confidence: 99%

Efficient catalytic ozonation by ruthenium nanoparticles supported on SiO 2 or TiO 2 : Towards the use of a non-woven fiber paper as original support

Biard

Werghi

Soutrel

et al. 2016

Chemical Engineering Journal

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Ozone decomposition on glass and silica

Cited by 21 publications

References 7 publications

Evolution of organic and inorganic components of aerosol during a Saharan dust episode observed in the French Alps

Evolution of organic and inorganic components of aerosol during a Saharan dust episode observed in the French Alps

Ozone decomposition on Saharan dust: an experimental investigation

Efficient catalytic ozonation by ruthenium nanoparticles supported on SiO 2 or TiO 2 : Towards the use of a non-woven fiber paper as original support

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