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Kulkarni, Parag; Deshmukh, Subodh; Kovalchuk, Vladimir I.; d’Itri, Julie L.

doi:10.1023/a:1019005813080

Cited by 59 publications

(31 citation statements)

References 38 publications

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“…The number of exposed platinum atoms (Pts) was calculated from the CO chemisorption data (COads). The stoichiometry of the adsorption of CO on platinum atoms (Pts/COads) was assumed to be 1 [17][18][19][20][21].…”

Section: Catalyst Characterizationmentioning

confidence: 99%

Gas-phase hydrodechlorination of mixtures of chloromethanes with activated carbon-supported platinum catalysts

Arevalo-Bastante

Álvarez-Montero

Bedia

et al. 2015

Applied Catalysis B: Environmental

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Section: Catalyst Characterizationmentioning

confidence: 99%

Gas-phase hydrodechlorination of mixtures of chloromethanes with activated carbon-supported platinum catalysts

Arevalo-Bastante

Álvarez-Montero

Bedia

et al. 2015

Applied Catalysis B: Environmental

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“…Several papers reported higher dispersions for catalysts prepared using PdCl 2 precursor than those from chlorinefree precursors in the case of Pd/Al 2 O 3 catalysts. The authors thought that dissolution of PdCl 2 in HCl forms PdCl 4 2-, [12,13] and an anion exchange reaction proceeds between PdCl 4 2-and OH -groups on the alumina surface that might increase the Pd dispersion [12,17,18]. As mentioned earlier, in the case of DP-Cl catalysts, a strong chemical bonding of the type, Pd-O-Al is formed at the Pd-support interface during the process of dehydration.…”

Section: The Hydrodechlorination Activity Of Dp-cl Catalysts: Optimizmentioning

confidence: 97%

“…Among the various technologies proposed [2,3] for treating these pollutants catalytic hydrodechlorination is adjudged as a simple, safe, effective methodology, which operates at low temperatures with limited toxic emissions. Among the noble metals, Pd is considered as the best catalyst for selective cleavage of the C-Cl bond [4,5].…”

Section: Introductionmentioning

confidence: 99%

Influence of Pd Precursor and Method of Preparation on Hydrodechlorination Activity of Alumina Supported Palladium Catalysts

et al. 2007

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A series of alumina supported Pd catalysts were prepared by the novel deposition-precipitation method adopting the chloride precursor (DP-Cl) of Pd and varying the metal content from 0.25 to 1.0 wt%. The catalytic properties of prepared catalysts were studied by various characterization techniques such as N 2 adsorption, CO chemisorption, TPR, XRD, XPS, and TEM techniques. The activity and stability of the catalysts were evaluated for the gas phase hydrodechlorination (HDC) of chlorobenzene operating at atmospheric pressure. At 1 wt% of Pd the catalyst showed higher chlorobenzene conversion with good stability when tested for a period of 25 h, whereas the other catalysts exhibited a loss in activity with time. In order to elucidate the exceptional activity and stability of this catalyst, a few more catalysts with 1 wt% Pd were prepared by impregnation technique and also using a nonchloride precursor, palladium nitrate. The 1 wt% DP-Cl catalyst again was found to be the best among the others. The activity and stability of the DP-Cl catalyst was also found to be superior to two low-dispersed catalysts, each with 10 wt% Pd, prepared by conventional impregnation method using the chloride and nitrate as the precursors. The characterization results reveal that the high activity and stability of the DP-Cl catalyst is related to the formation of electron deficient Pd species and its stabilization in the octahedral vacancies of alumina.

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“…Among noble metals in Group VIII known for those procedures, palladium was reported to be the most active metal that catalyze selective replacing of chlorine with hydrogen. As Pd not only promotes C-Cl bond cleavage efficiently, but also shows poisoning resistance [4,5].…”

Section: Introductionmentioning

confidence: 99%

Selective Liquid-phase Hydrodechlorination of Chlorotrifluoroethylene over Palladium-Supported Catalysts: Activity and Deactivation

Meng

Sun

et al. 2010

Catal Lett

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Liquid-phase hydrodechlorination of chlorotrifluoroethylene (CTFE) to trifluoroethylene (TrFE) with molecular hydrogen was studied over palladium-supported catalysts. BaSO 4 , Al 2 O 3 and activated carbon (AC) were used as supports, respectively. The results showed that the Pd/AC catalysts exhibit higher activity than Pd/BaSO 4 and Pd/Al 2 O 3 . The treatment of activated carbon with HNO 3 led to a considerable increase of surface functional groups containing oxygen atoms, which resulted in a higher dispersion of palladium on the supports and enhancement of catalytic activity. The stability of the catalyst was investigated, one reason for the inhibition was the accumulation of NaCl on the surface of Pd/AC that blocks the pores of carbon support. The activity of Pd/AC could partially recovered by washing with water. The other irreversible deactivation of the catalyst are from the change of particle size and the pore structure, leaching of Pd, a decrease of BET surface area and Pd surface area of Pd/AC catalyst.

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Cited by 59 publications

References 38 publications

Gas-phase hydrodechlorination of mixtures of chloromethanes with activated carbon-supported platinum catalysts

Gas-phase hydrodechlorination of mixtures of chloromethanes with activated carbon-supported platinum catalysts

Influence of Pd Precursor and Method of Preparation on Hydrodechlorination Activity of Alumina Supported Palladium Catalysts

Selective Liquid-phase Hydrodechlorination of Chlorotrifluoroethylene over Palladium-Supported Catalysts: Activity and Deactivation

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