Enhanced catalytic activity and stability of Ce doping on Cr supported HZSM-5 catalysts for deep oxidation of chlorinated volatile organic compounds

Yang, Peng; Xue, Xiangxin; Meng, Zhongwei; Zhou, Renxian

doi:10.1016/j.cej.2013.08.107

Cited by 133 publications

(37 citation statements)

References 43 publications

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“…As shown in Fig. 2(C), the evolution of the byproduct C 2 H 3 Cl is accompanied with the oxidation of DCE, since C 2 H 3 Cl is generated from the dehydrochlorination of DCE (Yang et al, 2013). C 2 H 3 Cl can be completely destroyed at 325 1C over HZSM-5, whereas it needs only 250 1C over (Ce,Cr) x O 2 and (Ce,Cr) x O 2 /HZSM-5, and much less C 2 H 3 Cl is detected over (Ce,Cr) x O 2 , indicating that the addition of (Ce,Cr) x O 2 significantly promotes its deep oxidation, which is consistent with the results of Fig.…”

Section: Dce Adsorption and Tpsrmentioning

confidence: 90%

“…The characterization of X-ray diffraction (XRD), N 2 adsorptiondesorption, ammonia temperature-programmed desorption (NH 3 -TPD) and hydrogen temperature-programmed reduction (H 2 -TPR) experiments were described in detail in previous reference (Yang et al, 2013). For NH 3 -TPD and H 2 -TPR measurements, the catalysts were firstly pretreated in an Ar flow (99.999%, 40 mL min À 1 ) at 400 1C for 0.5 h. The heating rate is 10 1C min À 1 in the process.…”

Section: Catalyst Characterizationmentioning

confidence: 99%

“…For deep catalytic oxidation of various ClVOCs, breaking the C-C, C-H, C-O and C-Cl bond is necessary. Acid sites are firstly required to cut the C-Cl bond with lower bonding energy, and then the oxidative sites are demanded to completely destroy the intermediates and byproducts (Erlt et al, 2008;Yang et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

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Synergistic performance between oxidizability and acidity/texture properties for 1,2-dichloroethane oxidation over (Ce,Cr)xO2/zeolite catalysts

Yang

Shi

Tao

et al. 2015

Chemical Engineering Science

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Section: Dce Adsorption and Tpsrmentioning

confidence: 90%

Section: Catalyst Characterizationmentioning

confidence: 99%

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Synergistic performance between oxidizability and acidity/texture properties for 1,2-dichloroethane oxidation over (Ce,Cr)xO2/zeolite catalysts

Yang

Shi

Tao

et al. 2015

Chemical Engineering Science

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“…Among them, chlorinated volatile organic compounds (CVOCs) are considered as the most harmful organic contaminants due to their acute toxicity and strong bioaccumulation potential [3]. Catalytic oxidation is an effective, energy-saving, and environment-friendly approach for CVOC elimination [4]. Supported noble metal catalysts and transition metal oxides are usually employed for arene elimination.…”

Section: Introductionmentioning

confidence: 99%

Catalytic destruction of chlorobenzene over mesoporous ACeOx (A=Co, Cu, Fe, Mn, or Zr) composites prepared by inorganic metal precursor spontaneous precipitation

Shi

et al. 2015

Fuel Processing Technology

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Mesostructured ACeO x (A = Co, Cu, Fe, Mn, or Zr) composites with large specific surface area and developed mesoporosity were prepared by inorganic metal precursor spontaneous precipitation (IMSP) method. Influences of catalyst surface area, pore structure, reducibility, and active oxygen concentration on catalytic performance were studied. Both preparation route and metal precursor type affect metal active site dispersion, and the IMSP is a desirable approach for synthesis of metal composites with homogeneous active phase distribution. The original crystalline structure of CeO 2 is well maintained although parts of transition metal cations are incorporated into its framework. The forming of A n+ -O 2− -Ce 4+ connections in ACeO x catalysts could reduce the redox potential of metal species, allowing effective redox cycles during oxidation reactions. CuCeO x demonstrates powerful catalytic efficiency with 99% of chlorobenzene (CB) destructed at 328°C, which is much lower than the other ACeO x oxides and Cu-doped catalysts synthesized via the incipient impregnation and coprecipitation methods (T 99 N 405°C). The active site reducibility is the foremost activity determining factor for CB destruction.

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“…The strength and amount of acidic sites were reected in the desorption temperature and in the peak area of a Fig. 32 3.2.4 Raman spectroscopy results. In all cases, a wide desorption peak could be seen in the temperature range of 100-500 C, which could be tted into three peaks through deconvolution.…”

Section: Nh 3 -Tpd Resultsmentioning

confidence: 97%

Catalytic low-temperature combustion of dichloromethane over V–Ni/TiO₂ catalyst

et al. 2015

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Vanadium-nickel mixed oxides supported on TiO 2 (anatase) were prepared by wet impregnation using ammonium metavanadate and nickel nitrate aqueous solution. The performance of as-prepared samples in catalytic dichloromethane (DCM) combustion was investigated, and their physicochemical properties were characterized in detail by X-ray diffraction, N 2 physisorption, H 2 temperature-programmed reduction, NH 3 temperature-programmed desorption, and Raman spectroscopy analyses. Results showed DCM combustion activity over V-Ni/TiO 2 catalyst was superior to that of V 2 O 5 /TiO 2 and NiO/TiO 2 catalysts. DCM could be completely converted into CO 2 , HCl, and a little amount of CO over Ni-V/TiO 2 catalyst at 350 C, the toxic by-products, such as CH 3 Cl, aldehydes and phosgene could not be observed by online IR spectroscopy. The high catalytic activity, selectivity, and stability of V-Ni/TiO 2 catalyst could be due to the good oxidative dehydrogenation ability (ODH), the good reducibility of active oxygen species, and suitable strength of Lewis acidic sites upon introduction of nickel oxide.

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Enhanced catalytic activity and stability of Ce doping on Cr supported HZSM-5 catalysts for deep oxidation of chlorinated volatile organic compounds

Cited by 133 publications

References 43 publications

Synergistic performance between oxidizability and acidity/texture properties for 1,2-dichloroethane oxidation over (Ce,Cr)xO2/zeolite catalysts

Synergistic performance between oxidizability and acidity/texture properties for 1,2-dichloroethane oxidation over (Ce,Cr)xO2/zeolite catalysts

Catalytic destruction of chlorobenzene over mesoporous ACeOx (A=Co, Cu, Fe, Mn, or Zr) composites prepared by inorganic metal precursor spontaneous precipitation

Catalytic low-temperature combustion of dichloromethane over V–Ni/TiO₂ catalyst

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Enhanced catalytic activity and stability of Ce doping on Cr supported HZSM-5 catalysts for deep oxidation of chlorinated volatile organic compounds

Cited by 133 publications

References 43 publications

Synergistic performance between oxidizability and acidity/texture properties for 1,2-dichloroethane oxidation over (Ce,Cr)xO2/zeolite catalysts

Synergistic performance between oxidizability and acidity/texture properties for 1,2-dichloroethane oxidation over (Ce,Cr)xO2/zeolite catalysts

Catalytic destruction of chlorobenzene over mesoporous ACeOx (A=Co, Cu, Fe, Mn, or Zr) composites prepared by inorganic metal precursor spontaneous precipitation

Catalytic low-temperature combustion of dichloromethane over V–Ni/TiO2 catalyst

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Product

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Catalytic low-temperature combustion of dichloromethane over V–Ni/TiO₂ catalyst