Low Temperature Catalytic Oxidation of Binary Mixture of Toluene and Acetone in the Presence of Ozone

Aghbolaghy, Mostafa; Soltan, Jafar; Chen, Ning

doi:10.1007/s10562-018-2536-8

Cited by 31 publications

(21 citation statements)

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“…The use of ozone in catalytic oxidation is a promising new technology for VOC elimination as higher conversions can be achieved at lower reaction temperatures than with those conducted with molecular oxygen. − The ozone-induced formation of active oxygen species on the surface of catalysts plays a critical role in VOC destruction . Previous work has suggested that using ozone can reduce the temperature required for oxidizing VOC by about 200 K, thus resulting in increased energy efficiency .…”

Section: Influence Of Reaction Conditionsmentioning

confidence: 99%

Recent Advances in the Catalytic Oxidation of Volatile Organic Compounds: A Review Based on Pollutant Sorts and Sources

et al. 2019

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Section: Influence Of Reaction Conditionsmentioning

confidence: 99%

Recent Advances in the Catalytic Oxidation of Volatile Organic Compounds: A Review Based on Pollutant Sorts and Sources

et al. 2019

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“…The results suggest that toluene is more resistant to oxidation than acetone. The reason for better toluene removal in the mixture can be attributed to the inhibiting and promoting behaviors commonly observed in the catalytic oxidation reaction. , …”

Section: Resultsmentioning

confidence: 99%

“…The Sabatier principle states that “the interaction of the catalyst and the substrate should be not too weak that it cannot activate the reactant and not too strong to be able to dissociate the products” . Aghbolaghy et al attributed the higher conversion of toluene in the mixture to the lower apparent activation energy of toluene . The other reason is the inhibitory effect on acetone removal due to the accumulation of carbonaceous materials that are created from incomplete oxidation of toluene.…”

Section: Resultsmentioning

confidence: 99%

“…γ-Al 2 O 3 (Alfa Aesar) was used as the support with particle sizes of less than 0.208 mm. Based on our previous research, this catalyst size was chosen to eliminate transport resistances. , For the 5% nominal metal loading on the support, 0.45 g of manganese(II) acetate tetrahydrate (Sigma-Aldrich, 99%) was mixed with 0.10 g of polyvynilpyrrolidone (PVP) (Sigma-Aldrich, K30, molecular weight = 40,000) and 36.4 mL of ethylene glycol (EG) (Sigma-Aldrich, anhydrous, 99.8%). γ-Al 2 O 3 (1.86 g) was added, and the mixture was agitated with a magnetic stirrer overnight.…”

Section: Methodsmentioning

confidence: 99%

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Enhancing Catalytic Ozonation of Acetone and Toluene in Air Using MnO_x/Al₂O₃ Catalysts at Room Temperature

Ghavami

Soltan

Chen

2021

Ind. Eng. Chem. Res.

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A series of MnO x /Al2O3 catalysts were synthesized by polyol and dry impregnation methods and calcined in the range of 400–800 °C. The impact of the preparation procedure and calcination temperature was investigated to enhance the catalytic degradation of a single component and binary mixtures of acetone and toluene at room temperature. The polyol method produces catalysts with a higher surface area, smaller cluster size, and lower oxidation state than the impregnation method. The results indicated that the oxidation state of manganese shifted to lower values by increasing the calcination temperature, which had a beneficial influence on the catalytic performance. As calcination temperature increases to 800 °C, the catalyst exhibited excellent catalytic activity in acetone degradation while no significant change was observed in degradation of toluene. In the binary mixture, toluene conversion was promoted whereas the acetone conversion was inhibited. X-ray absorption near-edge structure and extended X-ray absorption fine structure results of the spent catalysts showed that, unlike acetone, toluene altered the local structure of manganese oxides during the reaction. The catalyst was susceptible for the reduction process with toluene due to the accumulation of carbonaceous species resulting from incomplete oxidation of toluene.

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“…Unidirectional flow inside the catalytic glass foam is assumed. The by-products, CO2 and H2O produced were not identified nor quantified as it was already done by Aghbolaghy et al (2018) and it was assumed that they do not influence the kinetics of reaction. The internal mass transfer limitations were not considered taking into account that the support is macroporous (Lejeune et al, 2020a).…”

Section: Assumptionsmentioning

confidence: 99%

Simulation and optimization of the removal of toluene in air by ozonation with a catalytic open-cell foam

Cabrol¹,

Lejeune²,

Lebullenger

et al. 2021

Chemical Engineering Research and Design

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A heterogeneous catalyst, composed of an open-cell glass foam support impregnated with zerovalent ruthenium nanoparticles (loading around 0.1 wt.%), was used to remove toluene in air by catalytic ozonation. Experiments with lab-designed 2-6 cm length and 1.6 cm diameter catalysts were performed. A model based on the Langmuir-Hinshelwood mechanism, coupled with mass transfer limitations and including competitive effects between toluene and ozone, was designed. It accurately fits experimental data gathered at various temperatures (30-90°C), gas velocities (0.0025-0.017 m.s -1 ) and inlet ozone concentrations (6.4-11.2 g.m -3 ). The removal of ozone and toluene was mainly ruled by the ozone concentration at low concentrations while the adsorption competition becomes significant at high ozone concentrations.Predictive simulations, at 1.0 g.m -3 inlet toluene concentration, were compared in terms of investment cost, operating cost and process performances. The results highlighted the complexity of the process, which involves antagonist aims between toluene removal and the design of a compact and energy-efficient reactor. With the best operating conditions (90°C and 46 g.m -3 ozone inlet concentration), the removal of toluene reached 88% (removal rate of J o u r n a l P r e -p r o o f 0.25 g.m -3 .s -1 ) with a high ozone degradation (97%) in a moderate reactor length of 0.11 m. These good performances associated to the low cost of the catalyst's synthesis make it an efficient alternative for the removal of pollutants from air.

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Low Temperature Catalytic Oxidation of Binary Mixture of Toluene and Acetone in the Presence of Ozone

Cited by 31 publications

References 50 publications

Recent Advances in the Catalytic Oxidation of Volatile Organic Compounds: A Review Based on Pollutant Sorts and Sources

Recent Advances in the Catalytic Oxidation of Volatile Organic Compounds: A Review Based on Pollutant Sorts and Sources

Enhancing Catalytic Ozonation of Acetone and Toluene in Air Using MnO_x/Al₂O₃ Catalysts at Room Temperature

Simulation and optimization of the removal of toluene in air by ozonation with a catalytic open-cell foam

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Low Temperature Catalytic Oxidation of Binary Mixture of Toluene and Acetone in the Presence of Ozone

Cited by 31 publications

References 50 publications

Recent Advances in the Catalytic Oxidation of Volatile Organic Compounds: A Review Based on Pollutant Sorts and Sources

Recent Advances in the Catalytic Oxidation of Volatile Organic Compounds: A Review Based on Pollutant Sorts and Sources

Enhancing Catalytic Ozonation of Acetone and Toluene in Air Using MnOx/Al2O3 Catalysts at Room Temperature

Simulation and optimization of the removal of toluene in air by ozonation with a catalytic open-cell foam

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Product

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Enhancing Catalytic Ozonation of Acetone and Toluene in Air Using MnO_x/Al₂O₃ Catalysts at Room Temperature