Catalytic wet air oxidation of butyric acid and maleic acid solutions over noble metal catalysts prepared on TiO2

Dükkancı, Meral; Gündüz, Gönül

doi:10.1016/j.catcom.2008.12.022

Cited by 18 publications

(6 citation statements)

References 21 publications

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“…Copper oxide-based catalysts have been widely studied in the last 35 years due to their high activity and selectivity in processes such as methanol synthesis, water gas shift reaction, selective catalytic reduction of NOx, oxidative methanol steam reforming (SRM) as well as photocatalysis [11][12][13]. Among the materials studied for the catalytic support, γ-Al 2 O 3 [14], silica [15] and TiO 2 [16], are promising materials and are being increasingly used as catalytic supports for the several applications.…”

Section: Introductionmentioning

confidence: 99%

Study of the structural and morphological properties of copper catalysts supported on Al2O3 and TiO2 synthesized by the impregnation method

Queiroz¹,

Barbosa²

2019

Matéria (Rio J.)

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Aluminum oxide and titanium oxide are widely used as catalytic support. Due to their characteristics and properties, they have several applications such as chemical processes, photocatalysis and pollution control. In this work, the catalytic supports of Al 2 O 3 and TiO 2 were impregnated with 2% of copper oxide by the method of impregnation. The catalysts were characterized by X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM), Brunauer-Emmett-Telle (BET) surface area and Infrared Spectroscopy techniques (FTIR). The results of XRD analysis presented the Cu/TiO 2 catalyst with high degree of crystallinity where the peaks corresponding to the phases anatase, rutile and CuO are easily found, while the Cu/Al 2 O 3 catalyst presented low degree of crystallinity. The samples morphology is in the form of agglomeration, the specific surface area was higher when copper metal was impregnated to the supports and the highest values was obtained with Cu/Al 2 O 3 catalyst. FTIR analysis allowed the visualization of the main vibrations of the functional groups presents in the catalysts samples. According to the results, it was observed that the incorporation of copper oxide did not affect significantly the crystalline structure of TiO 2 and Al 2 O 3 and that at the calcination temperature of 500°C it is possible to obtain a high specific surface area and a more active phase resulting in a good characterization which is suitable for various industrial applications.

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Section: Introductionmentioning

confidence: 99%

Study of the structural and morphological properties of copper catalysts supported on Al2O3 and TiO2 synthesized by the impregnation method

Queiroz¹,

Barbosa²

2019

Matéria (Rio J.)

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“…Among the materials studied, γ-Al 2 O 3 is one of the best (Massa et al, 2009). Other support materials, such as silica (Njiribeako et al, 1978), activated carbon (Brainer et al,2014), pillared clay (Carriazo et al, 2005), TiO 2 (Dükkancý and Gündüz, 2009), MCM-41 (Eimer, 2006), ZSM-5 (Valkaj et al, 2007), Ce and Ce-Zr oxides (Nousir et al, 2008), γ-Al 2 O 3 -CeO 2 (Balzer et al, 2014) and polymeric membranes (Molinari at al., 2009), are promising materials and are being increasingly used as catalytic oxidation supports.…”

Section: Introductionmentioning

confidence: 99%

OXIDATION OF PHENOL IN AQUEOUS SOLUTION WITH COPPER OXIDE CATALYSTS SUPPORTED ON γ-Al2O3, PILLARED CLAY AND TiO2: COMPARISON OF THE PERFORMANCE AND COSTS ASSOCIATED WITH EACH CATALYST

Pires¹,

Santos²,

Jordão

2015

Braz. J. Chem. Eng.

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-The Catalytic Wet Air Oxidation (CWAO) of phenol using copper oxide catalysts supported by γ-Al 2 O 3 , TiO 2 , and pillared clay was evaluated to identify which of these catalysts was the most appropriate for this reaction. The CuO/PILC, CuO/γ-Al 2 O 3 and CuO/TiO 2 catalysts were the most successful at removing phenol and resulted in more than 96% conversion. Among these catalysts, CuO/γ-Al 2 O 3 produced the largest amount of CO 2 , the lowest amount of intermediate products and the lowest amount of copper leaching. These results showed that the CuO/γ-Al 2 O 3 catalyst was the best for the end of the reaction. However, the methods used in this study did not allow us to identify the most appropriate reaction time (or catalyst). An alternative approach for this problem was to quantify the costs for each reaction time. Using this approach, the CuO/γ-Al 2 O 3 catalyst was the most economically favorable catalyst when it was used during the first hour of the reaction.

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“…Due to the presence of a catalyst much higher oxidation rates are achieved and consequently, one can use less severe reaction conditions (low temperature and pressure) to reduce chemical oxygen demand to the same degree as in the case of noncatalytic process. In the CWAO process, the organic contaminants dissolved in water are either partially degraded by means of an oxidizing agent into biodegradable intermediates or mineralized into innocuous inorganic compounds such as CO 2 , H 2 O and inorganic salts, which remain in the aqueous phase [26,27]. Sulphur is converted to sulphate, halogens to halides and phosphorus to phosphates.…”

Section: Fundamentals Of Catalytic Wet Air Oxidation (Cwao)mentioning

confidence: 99%

Catalytic Wet Air Oxidation of Oxalic Acid using Platinum Catalysts in Bubble Column Reactor: A Review

Roy¹,

Vashishtha²,

Saroha³

2010

JESTR

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Wastewater treatment and re-use of industrial process water are critical issue for the development of human activities and environment conservation. Catalytic wet air oxidation (CWAO) is an attractive and useful technique for treatment of effluents where the concentrations of organic pollutants are too low, for the incineration and other pollution control techniques to be economically feasible and when biological treatments are ineffective, e.g. in the case of toxic effluents. In CWAO, combustion takes place on a Pt/Al2O3 catalysts usually at temperatures several degrees below those required for thermal incineration. In CWAO process, the organic contaminants dissolved in water are either partially degraded by means of an oxidizing agent into biodegradable intermediates or mineralized into innocuous inorganic compounds such as CO2, H2O and inorganic salts, which remain in the aqueous phase. In contrast to other thermal processes CWAO produces no NOx, SO2, HCl, dioxins, furans, fly ash, etc. This review paper presents the application of platinum catalysts in bubble column reactor for CWAO of oxalic acid.

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Catalytic wet air oxidation of butyric acid and maleic acid solutions over noble metal catalysts prepared on TiO2

Cited by 18 publications

References 21 publications

Study of the structural and morphological properties of copper catalysts supported on Al2O3 and TiO2 synthesized by the impregnation method

Study of the structural and morphological properties of copper catalysts supported on Al2O3 and TiO2 synthesized by the impregnation method

OXIDATION OF PHENOL IN AQUEOUS SOLUTION WITH COPPER OXIDE CATALYSTS SUPPORTED ON γ-Al2O3, PILLARED CLAY AND TiO2: COMPARISON OF THE PERFORMANCE AND COSTS ASSOCIATED WITH EACH CATALYST

Catalytic Wet Air Oxidation of Oxalic Acid using Platinum Catalysts in Bubble Column Reactor: A Review

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