Catalytic Wet Air Oxidation of Carboxylic Acids on TiO2-Supported Ruthenium Catalysts

Beziat, J.C.; Бессон, М.; Gallezot, P.; Durecu, Sylvain

doi:10.1006/jcat.1998.2352

Cited by 74 publications

(35 citation statements)

References 20 publications

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“…Mixtures of metal oxides of Cu, Zn, Co, Mn and Bi are reported to exhibit good activity, but leaching of these catalysts has been detected [36,44,49]. On the contrary, heterogeneous catalysts based on precious metals deposited on stable supports are less prone to active ingredient leaching [28,45,48,[73][74][75][76]. Furthermore, noble metal catalysts are generally found to be more effective than metal oxide catalysts for oxidizing acetic acid, while with both noble metal and metal oxide catalysts the rate of total oxidation is significantly higher than that of the uncatalyzed reaction [1,44,46,73,75,77,90].…”

Section: Catalystsmentioning

confidence: 96%

Catalytic wet-air oxidation processes: A review

2007

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Section: Catalystsmentioning

confidence: 96%

Catalytic wet-air oxidation processes: A review

2007

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“…Over hundred plants are in operation today, mostly to treat waste streams from petrochemical, chemical and pharmaceutical industries as well as residual sludge from wastewater treatment [12]. The use of catalysts (WACO) allows to use milder reaction conditions [49], but especially to promote conversion of the reaction intermediates (for example, acetic acid [50] and ammonia [13]) which are very difficult to convert in the absence of catalysts, as mentioned above. Figure 1(a) reports a simplified flow diagram of a WACO process which consists mainly of a high-pressure pump, an air or oxygen compressor, a heat-exchanger, a high-pressure (fixed bed) reactor and a downstream separator.…”

Section: A Comparison Of Whpco Versus Waco Technologiesmentioning

confidence: 98%

Wet hydrogen peroxide catalytic oxidation (WHPCO) of organic waste in agro-food and industrial streams

2005

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This review discusses the use of iron-or copper-based solid catalysts in the wet oxidation using H 2 O 2 as oxidant of organic molecules present in agro-food and industrial waste aqueous streams. After an introduction on the advantages and limits of using wet hydrogen peroxide catalytic oxidation (WHPCO) as opposite to wet air catalytic oxidation (WACO), the contribution shortly analyses recent results in the field in order to evidence new trends and open issues. More specific examples discussed regard the performances of Fe/zeolite and Fe-containing pillared clays in the oxidation of selected molecules (p-coumaric acid, propionic acid) of relevance for the treatment of organic waste from agro-food production (with reference especially to olive oil milling wastewater). The application of WHPCO in the treatment of complex effluents from electronic industry is also shortly discussed.

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“…A complex kinetic scheme leads generally to phenol through numerous [C n H m N p O q ] intermediates. This study is focused on CWAO of aniline and its intermediate by-products over noble metal catalysts well known for their high activity and stability in CWAO of many organic compounds [7,[21][22][23]. While oxidizing Nitrogen-containing organic compounds, phenol appears as a key component [24][25][26][27] and acetic acid as the most refractory intermediate [28,29].…”

Section: Introductionmentioning

confidence: 99%

Role of ceria-supported noble metal catalysts (Ru, Pd, Pt) in wet air oxidation of nitrogen and oxygen containing compounds

et al. 2005

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Catalytic Wet Air Oxidation (CWAO) of aniline, phenol, carboxylic acids and ammonia was carried out in a batch reactor over noble metals (Ru, Pd, Pt) supported on ceria. Ruthenium is very active for the conversion of a wide range of organic compounds and selective into carbon dioxide. The ability of ceria to transfer oxygen is essential for good performances in CWAO. However, Ru/CeO 2 is not selective for ammonia oxidation into N 2 . Addition of small amount of Pd enhances both activity and selectivity of Ru in this reaction. Finally, oxidation of nitrogenous organic compounds requires moderate temperature and oxygen pressure and needs to adjust the oxidizing capacity of the catalyst.

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Catalytic Wet Air Oxidation of Carboxylic Acids on TiO2-Supported Ruthenium Catalysts

Cited by 74 publications

References 20 publications

Catalytic wet-air oxidation processes: A review

Catalytic wet-air oxidation processes: A review

Wet hydrogen peroxide catalytic oxidation (WHPCO) of organic waste in agro-food and industrial streams

Role of ceria-supported noble metal catalysts (Ru, Pd, Pt) in wet air oxidation of nitrogen and oxygen containing compounds

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