Wet oxidation of acetic acid catalyzed by doped ceria

Deleitenburg, C.; Goi, Daniele; Primavera, Alessandra; Trovarelli, Alessandro; Dolcetti, Giuliano

doi:10.1016/s0926-3373(96)00080-x

Cited by 70 publications

(35 citation statements)

References 11 publications

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“…Doping ceria with copper resulted instead in more active catalysts. The reason for the activity enhancement is likely to be found in the structure modification due to the incorporation of Cu ions which favor the oxidation activity as already reported on doped-ceria catalyst, such as Mn, Zr and Ru [3,11,25,29,[34][35][36][37][38][39][40][41].…”

Section: Resultsmentioning

confidence: 67%

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Catalytic Wet Air Oxidation of Aqueous Solutions of Substituted Phenols

et al. 2006

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Catalytic wet air oxidation (CWAO) of aqueous solutions of phenol, 2-chlorophenol and 4-nitrophenol were studied using Cu/ CeO 2 with 4% of copper as catalytic material. The catalyst was prepared by an impregnation method and characterized by X-ray diffraction (XRD), BET surface area, oxygen storage capacity (OSC), temperature programmed reduction (TPR), electron paramagnetic resonance (EPR) and XPS. The reaction was carried out in a batch reactor at T=160°C and 1.0 MPa. Cu/CeO 2 catalyst was found effective in CWAO. On the basis of characterization data, it is suggested that the high activity of the copperceria catalyst is related to the modification of the structural and redox properties of the cerium oxide on copper addition. The ratio BOD 5 /COD was measured to evaluate the biodegradability. Pretreatment by CWAO under operating conditions resulted in effluents whose biodegradation rates were significantly higher than those of the original.

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Section: Resultsmentioning

confidence: 67%

“…In this regard, de Leitenburg et al have suggested that the activity of CeO 2 in the wet oxidation is related to the mobility of surface oxygen associated with deficient Ce sites, which activate oxygen [29]. Oxygen vacancies are further formed when ceria is doped by divalent or trivalent ions [30][31][32][33].…”

Section: Resultsmentioning

confidence: 99%

Catalytic Wet Air Oxidation of Aqueous Solutions of Substituted Phenols

et al. 2006

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“…Using mostly phenol [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20] and acetic acid [1,2,21] as model compounds, it has been ascertained that noble metal catalysts feature an outstanding CWO performance, though undergoing relevant deactivation phenomena mainly induced by strong adsorption of carbonaceous deposits (fouling/poisoning) [1,2]. Moreover, also in the perspective of finding out less costly alternatives to precious metal catalysts, a rising scientific concern has been progressively forwarded onto transition metal oxide systems, getting a suitable CWO activity of Cu [6][7][8][9][10][11][12][13]21] and Mn [14][15][16][17][18][19][20][21] based systems towards several substrates under relatively mild reaction conditions. Nevertheless, leaching and/or fouling deactivation phenomena remain still the main drawbacks to overcome for a successful commercial application of the CWO technology [1][2]…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, also in the perspective of finding out less costly alternatives to precious metal catalysts, a rising scientific concern has been progressively forwarded onto transition metal oxide systems, getting a suitable CWO activity of Cu [6][7][8][9][10][11][12][13]21] and Mn [14][15][16][17][18][19][20][21] based systems towards several substrates under relatively mild reaction conditions. Nevertheless, leaching and/or fouling deactivation phenomena remain still the main drawbacks to overcome for a successful commercial application of the CWO technology [1][2][3][9][10][11][12][14][15][16][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Basic Evaluation of the Catalytic Pattern of the CuCeOx System in the Wet Oxidation of Phenol with Oxygen

et al. 2006

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The working mechanism of a ceria-supported Cu (Cu at :Ce at =1:10) system in the Catalytic Wet Oxidation (CWO) of phenol with O 2 (T R , 130-170°C; P O2 , 7 atm) has been thoroughly assessed. Basic relationships amongst pH, extent of leaching and rate of phenol and TOC conversion prove the major contribution of a homogeneous catalytic path by Cu ions on the peculiar CWO pattern of supported copper catalyst. In addition, gas-phase reduction/oxidation tests signal the lack of reversibility of the redox cycle of the CuCeO x system under typical reaction conditions.

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“…The catalytic properties of Ce0 2 -based materials were thoroughly studied, and improvements in metal oxide oxidation catalysts resulted from strategically modifying Ce0 2 with other metal oxides (Liu and Flytzani-Stephanopoulos 1995a, b;de Leitenburg et al 1996;Trovarelli 1996;Terribile et al 1999;Trovarelli et al 1999). Unmodified Ce0 2 is active for oxidation of CO with lightoff temperatures (50% conversion) above 300°C (Liu and Flytzani-Stephanopoulos 1995a).…”

Section: Introductionmentioning

confidence: 99%

Catalytic Oxidation of Volatile Organic Liquids

et al. 2004

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The public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, «lathering and maintaining the data needed, and completing and reviewing the collection of information. Send comments regarding this burden estimate or any other aspect of this collection of information including suggestions for reducing the burden, PERFORMING ORGANIZATION NAME(S) AND ADDRESS(ES)Air Force Research Laboratory Airbase Technologies Division 139 Barnes Drive, Suite 2 Tyndall AFB FL 32403-5323 SPONSORING/MONITORING AGENCY NAME(S) AND ADDRESS(ES) PERFORMING ORGANIZATION REPORT NUMBER AFRL-ML-TY-TP-2003-4539 SPONSOR/MONITOR'S ACRONYM(S) SPONSOR/MONITOR'S REPORT NUMBER(S) DISTRIBUTION/AVAILABILITY STATEMENTDistribution Statement "A". Distribution Unlimited SUPPLEMENTARY NOTES Published in the Journal of Environmental Engineering 130(3) 2004 pp 329-337 ABSTRACTMetal oxide and supported-Pt catalysts were developed for complete oxidation of volatile organic compounds (VOCs) and other solvent-derived organic vapors (OVs) in air at relatively low temperatures. The goal for this work is to produce a simple, costeffective technology for reducing the concentration of organic contaminants in air to acceptable levels before the air is released into the atmosphere or recirculated. Specific applications include ventilated work spaces for spray painting and engine maintenance, indoor air decontamination, dry cleaning, food processing, fume hoods, residential use, and solvent-intensive industrial processes. Catalyst powders and monolith-supported catalysts were screened for conversion of 1-butanol, toluene, and methyl ethyl ketone to carbon dioxide and water.... However, the catalysts quickly deactivated in the presence of sulfur and phosphorus. Abstract: Metal oxide and supported-Pt catalysts were developed for complete oxidation of volatile organic compounds (VOCs) and other solvent-derived organic vapors (OVs) in air at relatively low temperatures. The goal for this work is to produce a simple, cost-effective technology for reducing the concentration of organic contf iiinants in air to acceptable levels before the air is released into the atmosphere or recirculated. Specific applications include ventilated work spaces for spray painting and engine maintenance, indoor air decontamination, dry cleaning, food processing, fume hoods, residential use, and solvent-intensive industrial processes. Catalyst powders and monolith-supported catalysts were screened for conversion of 1-butanol, toluene, and methyl ethyl ketone to carbon dioxide and water. The concentration of OVs in the feedstream was maintained at approximately 100 ppmv, and the space velocity was between 6,000 and 18,000 h -1 . Metal oxide catalysts without Pt generated complete conversion of 1-butanol to C0 2 at 150°C, 69% conversion at 100°C, and 15% conversion at 80°C. For toluene, complete conversion was achieved at 200°C, and greater than 75% conversion at 150°C. Addit...

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Wet oxidation of acetic acid catalyzed by doped ceria

Cited by 70 publications

References 11 publications

Catalytic Wet Air Oxidation of Aqueous Solutions of Substituted Phenols

Catalytic Wet Air Oxidation of Aqueous Solutions of Substituted Phenols

Basic Evaluation of the Catalytic Pattern of the CuCeOx System in the Wet Oxidation of Phenol with Oxygen

Catalytic Oxidation of Volatile Organic Liquids

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