Results 191 to 200 of about 2,018 (232)

Catalytic ozonation—Effect of carbon contaminants on the process of ozone decomposition

Applied Catalysis B: Environmental, 2013
Abstract Decomposition of ozone into hydroxyl radicals is one of the most frequently discussed hypotheses of the heterogeneous catalytic ozonation mechanism. Estimation of catalytic activity of solid catalysts in the reaction requires the reference system (without the catalyst) with the same pH in which spontaneous ozone decomposition will occur ...
Jacek Nawrocki, Lilla Fijołek
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Study of the Catalytic Ozonation of Humic Substances in Water and Their Ozonation Byproducts

Ozone: Science & Engineering, 1996
Abstract It is shown that using transition metals, especially Mn(II) and Ag(I), during ozonation of humic substances in water allows important reductions in the content of organic matter. Characterization of the organic compounds resulting from ozonation was made by concentrating the sample through liquid-liquid extraction or derivation with PFBOA.HCl,
R. Gracia, J.L. Aragües, J.L. Ovelleiro
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Chemical and Catalytic Properties of Ozone

Catalysis Reviews, 2000
Ozone is a unique species whose chemistry has a profound impact in many areas of our society. It is well known as a beneficial constituent of the upper atmosphere which shields living organisms fro...
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Effects of Ozonation and Catalytic Ozonation on the Removal of Natural Organic Matter from Groundwater

Journal of Environmental Engineering, 2012
AbstractThis paper presents a comparison of the effects of ozonation [0.4–3.0 mg ozone (O3)/mg (DOC)] and titanium dioxide–catalyzed ozonation (TiO2-O3) (0.4–3.0 mg O3/mg DOC; 1.0 mg TiO2/L) at pH 7.46 on the removal of natural organic matter (NOM) from groundwater from the central Banat region (northern Serbia).
Molnar Jazić, Jelena, Agbaba, Jasmina, Dalmacija, Božo, Klašnja, Mile, Watson, Malcolm, Kragulj Isakovski, Marijana   +5 more
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Hybrid Ceramic Membrane Catalytic Ozonation

2022
This chapter reviews all applications of (catalytic) ozonation coupled with ceramic membrane without functional surface groups. The combination of ozonation and ceramic membrane shows better potential performance on membrane fouling elimination, which depends on the combination mode, including pre- or in situ ozonation. After that, the ceramic membrane
Zilong Song, Ruijun Ren, Yuting Zhang, Ao Li, Jing Liu, Fei Qi   +5 more
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Kinetic decomposition of ozone and para-chlorobenzoic acid (pCBA) during catalytic ozonation

Water Research, 2004
The decomposition of ozone and para-chlorobezoic acid (pCBA) using ozone and ozone/goethite were investigated under various conditions to define the characteristics of ozonation and catalytic ozonation. A continuous analysis of the kinetics of the reaction between ozone and pCBA was established, and the decay rate of ozone and pCBA with/without ...
Park, Jong-Sup, Choi, Heechul, Cho, Jaeweon   +2 more
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Catalytic Filtration of Ozone in Airborne Application

Journal of Engineering for Industry, 1962
Studies were undertaken to determine a practical method of reducing the ozone content of cabin intake air typical of high-altitude, high-speed aircraft. To make use of the aircraft ram air temperature rise, catalytic filters were investigated for purposes of ozone destruction.
Myron Levine, John E. Boberg
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Room-temperature catalytic decomposition of ozone

Atmospheric Environment (1967), 1972
Abstract Thirty-five materials including charcoal, metals and metal oxides were tested for their room-temperature catalytic efficiency in decomposing ozone. Charcoal and nickelous oxide were found to be the best catalysts. A one-half inch thick filter bed of these materials initially removed 95 and 80 per cent, respectively, of the ozone from a 1 ft3
William D. Ellis, Paul V. Tometz
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Catalytic ozonation of alkylnaphthalenes in acetic acid

Kinetics and Catalysis, 2012
The oxidation of alkylnaphthalenes with ozone in acetic acid in the presence of cobalt(II) acetate is reported. Under the catalytic conditions, the ozonolysis of the aromatic system can be prevented to a considerable extent and the reaction can be directed toward the oxidation of the alkyl group.
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Catalytic ozonation

2019
Tatyana I. Poznyak, Isaac Chairez Oria, Alexander S. Poznyak   +2 more
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