Hydrodechlorination reactions of 2-chloro-1,1,1,2-tetrafluoroethane and chloroethane in H2 and D2 on Pd catalysts

Chen, N.; Rioux, R.M.; Ribeiro, Fabio H.

doi:10.1016/j.apcata.2004.02.049

Cited by 6 publications

(1 citation statement)

References 56 publications

(108 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the literature, two major reaction mechanisms are postulated for HDC reactions [32,52]: a sequential/serial mechanism and a concerted/parallel mechanism. A sequential mechanism can be represented as follows: (8) where * refers to an active site on the catalytic surface or an adsorbed species that is activated.…”

Section: Catalytic Hydrodechlorination Reactionsmentioning

confidence: 99%

Catalytic dechlorination of gas-phase perchloroethylene under mixed redox conditions

Orbay¹,

Gao²,

Barbaris³

et al. 2008

Applied Catalysis B: Environmental

View full text Add to dashboard Cite

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.

show abstract

Section: Catalytic Hydrodechlorination Reactionsmentioning

confidence: 99%

Catalytic dechlorination of gas-phase perchloroethylene under mixed redox conditions

Orbay¹,

Gao²,

Barbaris³

et al. 2008

Applied Catalysis B: Environmental

View full text Add to dashboard Cite

show abstract

Theoretical Study of the Stability of Carbene Intermediates Formed During the Hydrodechlorination Reaction of the CF x Cl4−x Family on the Pd(110) Surface

2009

View full text Add to dashboard Cite

In the present work the stability of the species CCl 2 , CFCl, CF 2 and CHF, which are produced during the hydrodechlorination reaction of the CF x Cl 4-x family, have been investigated on the Pd(110) surface by applying ab initio periodic Density Functional Theory. The most stable configuration for these carbenes on this surface is the short-bridge. Hollow positions have not been found as stationary points in most of the cases. For the chlorinated fragments, the optimisation of these hollow positions resulted in partial or full dechlorinated fragments. The most stable configuration for the carbenes (short-bridge) was compared to the least stable one (top) within different surface conditions in order to verify any change in this stability trend. Both geometries are equally affected by the surface modifications for most of the carbenes. The shortbridge is, however, more sensitive to the coverage increase in the CHF case. CHF has the strongest binding energy to the Pd(110) surface, whilst CF 2 has the least one. The stability trend of CHF, CFCl and CF 2 helped to better understand the selectivity of the hydrodechlorination reaction of the mono carbon CFC's, for example, the suggestion that CF 2 is the most important intermediate on the hydrodechlorination of CF 2 Cl 2 was confirmed by the calculations.

show abstract

SBA-15 mesoporous silica modified with rhodium by MDD method and its catalytic role for N2O decomposition reaction

et al. 2010

View full text Add to dashboard Cite

SBA-15 mesoporous silicas modified with rhodium were studied as catalysts for the N 2 O decomposition reaction. Rhodium was deposited on SBA-15 by the Molecular Designed Dispersion (MDD) method using Rh(acac) 3 as a precursor of active phase. The same method was used for the deposition of Cu, Fe, Al and Ti. The SBA-15 support modified with metals were characterized with respect to metal loading (EPMA), structure (XRD), texture (BET), morphology (SEM), Rh dispersion (oxygen chemisorption), surface acidity (pyridine adsorption) and chemical nature of introduced copper and iron species (UV-vis-DRS). The rhodium-containing SBA-15 samples were found to be active catalysts for the N 2 O decomposition reaction. Deposition of Al on the Rh-loaded catalyst increased its activity. An opposite effect was observed for the samples modified with Cu and Fe.

show abstract

Hydrodechlorination reactions of 2-chloro-1,1,1,2-tetrafluoroethane and chloroethane in H2 and D2 on Pd catalysts

Cited by 6 publications

References 56 publications

Catalytic dechlorination of gas-phase perchloroethylene under mixed redox conditions

Catalytic dechlorination of gas-phase perchloroethylene under mixed redox conditions

Theoretical Study of the Stability of Carbene Intermediates Formed During the Hydrodechlorination Reaction of the CF x Cl4−x Family on the Pd(110) Surface

SBA-15 mesoporous silica modified with rhodium by MDD method and its catalytic role for N2O decomposition reaction

Contact Info

Product

Resources

About