A two-stage Ce/TiO2–Cu/CeO2 catalyst with separated catalytic functions for deep catalytic combustion of CH2Cl2

Cao, Shuang; Shi, Mengpa; Wang, Haiqiang; Yu, Feixiang; Weng, Xiaole; Liu, Yue; Wu, Zhongbiao

doi:10.1016/j.cej.2015.12.107

Cited by 62 publications

(32 citation statements)

References 41 publications

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“…787 Recently, a Ce/TiO 2 -Cu/CeO 2 material with separate catalytic functions was designed by Wu and coworkers. 788 Their results demonstrated that 97% of DCM could be converted at 330 °C (GHSV = 30 000 h −1 ) with fewer undesired CO, Cl 2 , and C x H y Cl z byproducts. Furthermore, the conversion and CO 2 yield were well kept even in the presence of water.…”

Section: Chemical Reviewsmentioning

confidence: 98%

“…Recently, a two-stage Ce/TiO2-Cu/CeO2 catalyst with separated catalytic functions was designed and adopted as a catalyst for the removal of DCM by Wu and co-workers. 788 The cleavage of the C-Cl and the total oxidation of CO were physically isolated in the two-stage system, which avoided not only the decrease of acid sites on Ce-Cu/TiO2 catalyst, but also avoided the chlorine poisoning of TiO2 due to the strong adsorption of Cl on CuO. A three-step degradation mechanism was proposed, which consisted of the adsorption and cleavage of the C-Cl bonds, the deep oxidation of C-H bonds in the intermediate species and finally, the oxidation of CO to CO2 (Fig.…”

Section: Dichloromethane and Tetrachloromethanementioning

confidence: 99%

“…The authors proposed that the material prepared by the solid mixing route had the best activity ( T 97 = 335 °C; GHSV = 30 000 h –1 ) and anti-chlorine capability, compared with samples synthesized by impregnation and hydrothermal methods . Recently, a Ce/TiO 2 -Cu/CeO 2 material with separate catalytic functions was designed by Wu and co-workers . Their results demonstrated that 97% of DCM could be converted at 330 °C (GHSV = 30 000 h –1 ) with fewer undesired CO, Cl 2 , and C x H y Cl z byproducts.…”

Section: Oxidation Of Different Sorts Of Vocsmentioning

confidence: 99%

“…The Cl from DCM is released as HCl and/or reacts with γ-Al 2 O 3 to form aluminum chloride. Recently, a Ce/TiO 2 -Cu/CeO 2 material with separate catalytic functions was designed and adopted as a catalyst for the removal of DCM by Wu and co-workers . The cleavage of the C–Cl bond and oxidation of CO were physically isolated in the two-stage system, which avoided not only the decrease of acid sites on Ce-Cu/TiO 2 but also the chlorine poisoning of TiO 2 attributed to the strong adsorption of Cl on CuO.…”

Section: Oxidation Kinetics and Mechanismmentioning

confidence: 99%

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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: Chemical Reviewsmentioning

confidence: 98%

Section: Dichloromethane and Tetrachloromethanementioning

confidence: 99%

Section: Oxidation Of Different Sorts Of Vocsmentioning

confidence: 99%

Section: Oxidation Kinetics and Mechanismmentioning

confidence: 99%

See 2 more Smart Citations

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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“…(Aranzabal et al, 2014;Yang et al, 2019;Zhang et al, 2018) In the current work, we studied CuO, MnO2 and V2O5 as an alternative to Pt in DCM oxidation. CuO supported on ceria and/or titania has shown its potential in DCM, 1,2-dichloroethane and trichloroethylene oxidation (Cao et al, 2016;Yang et al, 2019). One benefit of CuO is that it can be reduced at less than 200°C, which may be beneficial for the DCM complete oxidation reaction.…”

Section: Introductionmentioning

confidence: 99%

Catalytic abatement of dichloromethane over transition metal oxide catalysts: Thermodynamic modelling and experimental studies

Assal

Ojala

Zbair

et al. 2019

Journal of Cleaner Production

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Dichloromethane (DCM) is a noxious chemical that is widely used in industry. The current work focuses on the catalytic abatement of DCM from industrial effluents to minimize its harmful effects to the environment and human wellbeing. Three transition metal oxide catalysts (V, Cu and Mn) supported on γ-Al2O3 were synthetized for total oxidation of DCM in presence of steam.Thermodynamic modelling was used to reveal information related to the stability of the used transition metal oxides in the abatement conditions. The results showed that with 10 wt-% CuO and 10 wt-% V2O5 containing catalysts 100% conversion of DCM together with 90% HCl yield and insignificant by-product formation can be achieved at temperature around 500°C. According to modelling, V2O5 should be stable at the conditions of DCM oxidation, while CuO would be more stable at higher temperature level (decomposition of CuCl2 starts at 300°C). MnCl2 remains stable until 800 °C, which leads to deactivation of MnO2 catalyst. Presence of steam inhibits the poisoning 2 of the materials by chlorine based on thermodynamic calculation. XRF analysis supports the results of thermodynamic modellingused MnO2 and CuO catalysts contain chlorine, which was not detected in case of V2O5/Al2O3. CuO/γ-Al2O3 seems to be a good alternative to noble metal catalysts for the total oxidation of dichloromethane when used in the presence of steam and the temperatures above 300 °C to minimize Cl-poisoning. The outcomes of this study showed that the prepared metal oxides are promising catalysts for to minimize pollution caused by chlorinated volatile organic compounds.

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Perovskite Oxides in Catalytic Combustion of Volatile Organic Compounds: Recent Advances and Future Prospects

Yang

Sun

et al. 2022

Energy & Environ Materials

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Volatile organic compounds are a kind of important indoor and outdoor air pollutants. In recent years, more and more attention has been paid to the ways of volatile organic compound elimination because of its potential long‐term effects on human health. Among the various available methods for volatile organic compound elimination, the catalytic combustion is the most attractive method due to its high efficiency, low cost, simple operation, and easy scale‐up. Perovskite oxides, as a large family of metal oxides with their A‐site mainly of lanthanide element and/or alkaline earth metal element and B‐site of transition metal element, have been extensively investigated as active and stable catalysts for volatile organic compound removal reactions due to their abundant compositional elements, high thermal/chemical stability, and compositional/structural flexibility. The catalytic performance of perovskite oxides is strongly depended on its material composition, morphology, and surface/bulk properties, while the doping, tailored synthesis route, and composite construction may have a significant effect on the bulk (oxygen vacancy concentration, lattice structure), surface (oxygen species, defect) properties, and particulate morphology, consequently the catalytic activity and stability for volatile organic compound removal. Herein, a comprehensive review about the recent advances in perovskite oxides for volatile organic compound elimination reactions based on catalytic combustion is presented from different aspects with a special emphasis on the material design strategies, such as compositional tuning, morphology control, nanostructure building, hybrid construction, and surface modification. At last, some perspectives are presented on the development and design of perovskite oxide‐based catalysts for volatile organic compound removal applications by highlighgting the critical issues and challenges.

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A two-stage Ce/TiO2–Cu/CeO2 catalyst with separated catalytic functions for deep catalytic combustion of CH2Cl2

Cited by 62 publications

References 41 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

Catalytic abatement of dichloromethane over transition metal oxide catalysts: Thermodynamic modelling and experimental studies

Perovskite Oxides in Catalytic Combustion of Volatile Organic Compounds: Recent Advances and Future Prospects

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