Hydrogen-Assisted 1,2-Dichloroethane Dechlorination Catalyzed by Pt–Sn/SiO: Effect of the Pt/Sn Atomic Ratio

Rhodes, William D.; Lázár, K.; Kovalchuk, Vladimir I.; d’Itri, Julie L.

doi:10.1006/jcat.2002.3731

Cited by 10 publications

(16 citation statements)

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“…Figure 1 shows the results of catalytic screening in the reaction of 1,2dichloroethane. The 1 wt.% Pt/Al 2 O 3 catalyst showed mainly ethane formation, without any trace of ethylene (desired reaction product), in agreement with earlier reports [8,9]. On the other hand, its overall activity was the highest, and, interestingly, it was steadily growing in time on stream.…”

Section: Methodssupporting

confidence: 90%

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Hydrodechlorination of chloroalkanes on supported platinum catalysts

Legawiec-Jarzyna

Śrębowata

Juszczyk

2006

React Kinet Catal Lett

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A comparative study of hydrodechlorination of carbon tetrachloride and 1,2dichloroethane over supported Pt catalysts showed a large effect of support (C, Al 2 O 3 , SiO 2 ) on the catalytic behavior. High selectivity towards CHCl 3 (from CCl 4 ), ~80%, was found for Al 2 O 3 -and SiO 2 -supported Pt. In 1,2-dichloroethane reaction, Pt/Al 2 O 3 appeared more active than the other catalysts but the least selective towards C 2 H 5 Cl, giving mainly ethane. Al 2 O 3 -and C-supported catalysts contained more chlorine and carbon after hydrodechlorination.

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Section: Methodssupporting

confidence: 90%

“…* Corresponding author. E-mail: zk@ichf.edu.pl [8,9]). This work was aimed towards the effect of support (C, Al 2 O 3 , SiO 2 ) on the catalytic properties of platinum in hydrodechlorination of CCl 4 and 1,2-C 2 H 4 Cl 2 .…”

Section: Introductionmentioning

confidence: 99%

Hydrodechlorination of chloroalkanes on supported platinum catalysts

Legawiec-Jarzyna

Śrębowata

Juszczyk

2006

React Kinet Catal Lett

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“…Late transition metals are common catalysts for the 1,2-DCA hydrodechlorination reaction, − among which Pt and Pt-containing alloys have been extensively studied in the experimental literature. − The performance of monometallic Pt catalysts is generally unsatisfactory; although they are active dechlorination catalysts, they also hydrogenate ethylene and produce mostly ethane and chloroethane as the final products. , Bimetallic alloys, such as Pt–Cu, − ,,, Pt–Ag, and Pt–Sn , have been shown as promising catalysts for 1,2-DCA hydrodechlorination in terms of both dechlorination activity and ethylene selectivity. A general trend can be observed for these bimetallic systems: ethylene selectivity increases with the composition of Cu, Ag, or Sn while its activity remains relatively unchanged with the catalyst composition.…”

Section: Introductionmentioning

confidence: 99%

Hydrodechlorination of 1,2-Dichloroethane on Platinum Catalysts: Insights from Reaction Kinetics Experiments, Density Functional Theory, and Microkinetic Modeling

Stangland

Dumesic

et al. 2021

ACS Catal.

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Catalytic hydrodechlorination is a promising strategy for treating industrial 1,2-dichloroethane wastes, for which Pt and Pt-based alloy catalysts are widely used. Here, we performed a detailed mechanistic study for 1,2-dichloroethane hydrodechlorination on Pt using a synergistic approach combining density functional theory (DFT) calculations, reaction kinetics experiments, and microkinetic modeling. Using planewave DFT calculations, we evaluated the reaction energy and activation energy barrier of each elementary step involved in the reaction network on Pt(111). The calculated energetics were then incorporated into a comprehensive mean-field microkinetic model accounting for a total of 65 elementary steps. The model-predicted reaction rates were compared with the results from our reaction kinetics experiments on SiO2-supported Pt catalysts. Our results indicated that the hydrodechlorination of 1,2-dichloroethane on Pt(111) starts with a H-removal step; then, it proceeds through a sequence of alternating dechlorination and dehydrogenation steps until vinylidene (CH2C*) is formed; finally, CH2C* is hydrogenated to the final product, ethane, sequentially via vinyl (CH2CH*), ethylene, and ethyl (CH3CH2*) intermediates. After model parameter adjustments, we achieved good agreement between our theoretical model and experimental results; the adjustments to the calculated parameters are consistent with the typically anticipated coverage effects. Our study offers valuable mechanistic insights, which are useful for improving catalysts for this chemistry.

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“…The available literature data on the dechlorination of dichloroethane (DCE) mostly concern studying this reaction with the participation of hydrogen over bimetallic catalysts [17][18][19][20][21], where Pt, Pd, Au, Ag, Ru, Ni, Cu, and Sn are used as the metallic phase and SiO 2 , Al 2 O 3 , and activated carbon are employed as supports. The authors of these studies believe that the role of the noble metals consists in enhancing the catalytic activity of the catalysts, and adding a second metal suppresses the secondary processes, contributing to a rise in ethylene selectivity.…”

Section: Physical Chemistry Of Nanoclusters and Nanomaterialsmentioning

confidence: 99%

Effect of structure and surface properties on the catalytic activity of nanodiamond in the conversion of 1,2-dichloroethane

Tveritinova

Zhitnev

Кулакова

et al. 2015

Russ. J. Phys. Chem.

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The catalytic activity of a detonation nanodiamond and its Ni-containing forms in the conversion of 1,2-dichloroethane is studied and compared with the activity of other carbon and nanocarbon materials: carbon nanotubes, "Dalan" synthetic diamond, and fluorinated graphite. The surface and structure of the carbon materials are characterized using XRD, diffuse reflectance IR spectroscopy, XPS, BET, and TPR. The catalytic properties of the materials are studied using the pulsed microcatalytic method. It is found that the synthetic diamond, the nanodiamond, and its Ni-containing forms are catalysts for dichloroethane conversion in a nitrogen atmosphere, where the main product is ethylene. It is noted that the catalytic activity of deactivated diamond catalysts is restored after hydrogen treatment. It is shown that the carbon structure of the nanodiamond and the "Dalan" synthetic diamond with hydrogen groups located on it plays a key role in the dichloroethane conversion. It is found that the nanodiamond acts simultaneously as a catalyst and an adsorbent of chlorine-containing products of dichloroethane conversion.

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Hydrogen-Assisted 1,2-Dichloroethane Dechlorination Catalyzed by Pt–Sn/SiO: Effect of the Pt/Sn Atomic Ratio

Cited by 10 publications

References 0 publications

Hydrodechlorination of chloroalkanes on supported platinum catalysts

Hydrodechlorination of chloroalkanes on supported platinum catalysts

Hydrodechlorination of 1,2-Dichloroethane on Platinum Catalysts: Insights from Reaction Kinetics Experiments, Density Functional Theory, and Microkinetic Modeling

Effect of structure and surface properties on the catalytic activity of nanodiamond in the conversion of 1,2-dichloroethane

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