Deactivation of Pd catalysts in the hydrodechlorination of chloropentafluoroethane

Moon, Dong Ju; Chung, Moon-Hyun; Park, Kun You; Hong, Suk In

doi:10.1016/s0926-860x(97)00352-9

Cited by 67 publications

(30 citation statements)

References 11 publications

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“…There is no systematic understanding yet on how Cl 2 , HCl, and surface chloride (or their synergistic effects) cause the deactivation of various catalysts. Other proposed causes of deactivation include metal particle sintering [61] and coke deposition [62,63]. Based on the relevant reactions discussed earlier, we shall focus on coke formation and chlorine poisoning as the major mechanisms of catalyst deactivation.…”

Section: Catalyst Deactivationmentioning

confidence: 99%

Catalytic dechlorination of gas-phase perchloroethylene under mixed redox conditions

Orbay¹,

Gao²,

Barbaris³

et al. 2008

Applied Catalysis B: Environmental

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The validity of a new method to destroy gas-phase perchloroethylene (PCE) is demonstrated at bench scale using a fixed-bed reactor that contains a Pt/Rh catalyst. Hydrogen and oxygen were simultaneously fed to the reactor together with PCE. The conversion efficiencies of PCE were sensitive to H 2 /O 2 ratio and reactor temperature. When the temperature was ≥ 400 °C and H 2 /O 2 was ≥ 2.15, PCE conversion efficiency was maintained at ≥ 90%. No catalyst deactivation was observed for over two years, using only mild, convenient regeneration procedures. It is likely that PCE reduction steps precede oxidation reactions and that the importance of oxidation lies in its elimination of intermediates that would otherwise lead to catalyst poisoning. In practice, this catalytic dechlorination method holds potential for low-cost, large-scale field operation.

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Section: Catalyst Deactivationmentioning

confidence: 99%

Catalytic dechlorination of gas-phase perchloroethylene under mixed redox conditions

Orbay¹,

Gao²,

Barbaris³

et al. 2008

Applied Catalysis B: Environmental

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“…The extent of sintering of metal catalysts appears to be related to the nature of the support. Moon et al [35] reported that the sintering of Pd supported on oxide supports was the main cause of deactivation in the gas-phase hydrodehalogenation of CClF2CF3.…”

Section: Introductionmentioning

confidence: 99%

Deactivation behavior of Pd/C and Pt/C catalysts in the gas-phase hydrodechlorination of chloromethanes: Structure–reactivity relationship

Martin-Martinez

Álvarez-Montero

Gómez-Sainero

et al. 2015

Applied Catalysis B: Environmental

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“…Moon et al ascribed sintering of Pd as the primary source of deactivation in the hydrodehalogenation of CClF 2 CF 3 over supported Pd catalyst [103]. The extent of sintering of metal catalysts depends on the properties of the support.…”

Section: Catalyst Deactivationmentioning

confidence: 99%

A review of CFC and halon treatment technologies – The nature and role of catalysts

Kennedy

Adesina

et al. 2006

Catal Surv Asia

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The purpose of this review article is to provide readers with an account of CFC and halon treatment technologies as depicted in the patent and open literature. Destruction technologies, in which halons and CFCs are converted into species such as CO 2 , HX or X 2 (X = Br, Cl, F), are treated less extensively. Emphasis has been placed on conversion processes, which aim at transforming (rather than destroying) CFC or halon into environmentally benign and useful products. It has been found that catalytic hydrodehalogenation over transition metal based catalysts, Pd in particular, has great potential for conversion of CFCs and halons to hydrofluorocarbons. In this regard, the focus of this review is on catalytic hydrodehalogenation, including an assessment of reaction mechanisms, catalytic activity, selectivity and durability.

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Deactivation of Pd catalysts in the hydrodechlorination of chloropentafluoroethane

Cited by 67 publications

References 11 publications

Catalytic dechlorination of gas-phase perchloroethylene under mixed redox conditions

Catalytic dechlorination of gas-phase perchloroethylene under mixed redox conditions

Deactivation behavior of Pd/C and Pt/C catalysts in the gas-phase hydrodechlorination of chloromethanes: Structure–reactivity relationship

A review of CFC and halon treatment technologies – The nature and role of catalysts

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