Oxidation of benzene over bimetallic Cu–Ce incorporated rice husk silica catalysts

Adam, Farook; Radhika, T.

doi:10.1016/j.cej.2010.02.055

Cited by 38 publications

(11 citation statements)

References 56 publications

(58 reference statements)

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“…Figure 4 shows the XRD patterns for five selected catalysts with different metal loadings and calcination temperatures. There are two phases distinguished from the XRD profiles; the amorphous phase represents a carbonaceous support [50] and the peaks are observed due to CuO crystallites. The patterns were compared with copper oxide reference patterns including: CuO (00-001-1117 and 00-002-1040, ICDD) and Cu 2 O (00-001-1142, ICDD) by X'Pert HighScore software version 1.0d produced by PANalytical BV Almelo, the Netherlands.…”

Section: Effect Of Catalyst Metal Loading and Calcination Temperaturementioning

confidence: 98%

Preparation, characterization and kinetic behavior of supported copper oxide catalysts on almond shell-based activated carbon for oxidation of toluene in air

et al. 2014

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Dispersed copper oxide nano-catalysts supported on almond shell-based activated carbon were prepared for catalytic oxidation of toluene in air. The response surface methodology was used to express the catalyst removal efficiency in terms of catalyst metal loading and calcination temperature. Catalyst activity increased with both increasing calcination temperature and metal loading. Calcination temperature had a significant effect on the catalyst activity only at high metal loadings. Two different catalyst preparation methods were employed to investigate the effect of impregnation technique on the deposition-precipitation method. Well-dispersed nano catalysts with higher efficiency towards oxidation of toluene were prepared by the heterogeneous depositionprecipitation (HDP) as compared with the combined impregnation and deposition-precipitation method. The support and catalyst properties were determined by X-ray diffraction, Transmission electron microscopy, fieldemission scanning electron microscope, Boehm test, Brunauer-Emmett-Teller surface area measurements, and energy-dispersive X-ray spectroscopy. Characterization analyses and reaction experiments indicated the antonym effect of impregnation method on the deposition-precipitation method for catalyst preparation. Two types of crystallite (large and small) were formed on the support as a consequence of using the combined catalyst preparation method. Kinetic models were proposed for oxidation of toluene using copper oxide catalysts prepared by the HDP method. The kinetic study indicated that an Eley-Rideal mechanism could adequately describe the kinetic behavior of toluene oxidation.List of symbols C 0 Inlet feed concentration (ppm) C e Exit gas concentration (ppm) D Mean crystallite diameter (nm) K Dimensionless shape factor = 0.9 k X-ray wavelength BLine broadening at half maximum intensity H Bragg angle X T Steady state conversion of the toluene W Weight of catalyst loaded in reactor (g) M Inlet molar flow rate of toluene (mol/s) r Rate of toluene oxidation (mol/g s) Error Objective function of GA methodology for estimating kinetic constants was the absolute error E Activation energy (kJ/mol) DH Adsorption enthalpy (kJ/mol) R Gas constant (J/mol K) R 2

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Section: Effect Of Catalyst Metal Loading and Calcination Temperaturementioning

confidence: 98%

Preparation, characterization and kinetic behavior of supported copper oxide catalysts on almond shell-based activated carbon for oxidation of toluene in air

et al. 2014

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“…Besides ceria-supported noble metals catalyst, ceria-based composite materials are also widely applied in catalytic total oxidation of hydrocarbons. Among them, the composite oxides such as Mn-Ce-O, [96][97][98][99][100][101] Cu-Ce-O, [102][103][104][105] and Co-Ce-O [83,106] show good activities, where the strong synergistic effect can be promoted by their lattice contact or doping function.…”

Section: Hydrocarbon Combustionmentioning

confidence: 99%

Nanostructured cerium oxide: preparation, characterization, and application in energy and environmental catalysis

Tang

Gao

2016

MRS Communications

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“…3a shows the XRD patterns for three bimetallic catalysts synthesized by the cDP method with three different Cu : Co ratios. There are two phases distinguished from the XRD proles; the amorphous phase is characteristic of the carbonaceous support 40 3a-c indicated that the deposition-precipitation method had resulted in the formation of copper and cobalt oxides (CoO and CuO) over almond shell derived AC and no Cu 2 O, Cu(OH) 2 and Co(OH) 2 crystallites were detected. In addition, with increasing cobalt loading to more than 4 wt%, CoCuO 2 crystallites were also formed for both cDP and sDP methods.…”

Section: Characterization Of Bimetallic Catalystsmentioning

confidence: 99%

Supported copper and cobalt oxides on activated carbon for simultaneous oxidation of toluene and cyclohexane in air

2015

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Oxidation of benzene over bimetallic Cu–Ce incorporated rice husk silica catalysts

Cited by 38 publications

References 56 publications

Preparation, characterization and kinetic behavior of supported copper oxide catalysts on almond shell-based activated carbon for oxidation of toluene in air

Preparation, characterization and kinetic behavior of supported copper oxide catalysts on almond shell-based activated carbon for oxidation of toluene in air

Nanostructured cerium oxide: preparation, characterization, and application in energy and environmental catalysis

Supported copper and cobalt oxides on activated carbon for simultaneous oxidation of toluene and cyclohexane in air

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