Journal ArticleDOI
Selective hydrogenolysis of dichlorodifluoromethane (CCl2F2) over CCA supported palladium bimetallic catalysts
S. Chandra Shekar,S. Chandra Shekar,J. Krishna Murthy,J. Krishna Murthy,P. Kanta Rao,K.S. Rama Rao,Erhard Kemnitz +6 more
TLDR
In this paper, the effect of addition of second metal on Pd/CCA catalyst is screened in terms of partial dehalogenation ability and thermal stability for hydrodechlorination activity of CCl 2 F 2 to maximize the CH 2F 2 yield.Abstract:
La, Bi, Sb, Sn, Ba, and Zn are chosen for addition on carbon covered alumina (CCA) supported Pd catalyst. The effect of these second metals on supported Pd catalysts has been studied for the hydrogenolysis activity of CCl 2 F 2 . Bi and Sb promoters have been found to improve not only the thermal stability but also selectivity towards CH 2 F 2 . Sn bimetallic catalyst exhibited high selectivity towards CHClF 2 . This may be explained on the basis of the metal–metal interactions that influence the reducibility of the palladium. These improved properties arise due to inter-metallic compound formation as evidenced from the XRD and TPR data on CCA supported bimetallic palladium catalysts. The effect of addition of second metal on Pd/CCA catalyst is screened in terms of partial dehalogenation ability and thermal stability for hydrodechlorination activity of CCl 2 F 2 to maximize the CH 2 F 2 yield.read more
Citations
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Journal ArticleDOI
Uniformly carbon-covered alumina and its surface characteristics.
TL;DR: The as-prepared CCA possessed the texture of alumina and the surface properties of carbon or both carbon and alumina depending on the carbon coverage and number of carbon layers in CCA.
Journal ArticleDOI
Synthesis and characterization of mesoporous alumina for use as a catalyst support in the hydrodechlorination of 1,2-dichloropropane: effect of preparation condition of mesoporous alumina
TL;DR: In this article, the effect of the mole ratio of surfactant/aluminum precursor on the properties of aluminas and supported Ni catalysts was investigated, and the amount of aluminum dissolved during the impregnation step was correlated with the Mole Ratio of Surfactant/Aluminum precursor.
Journal ArticleDOI
Enhanced dechlorination of trichloroethylene by membrane-supported Pd-coated iron nanoparticles
Linfeng Wu,Stephen M. C. Ritchie +1 more
TL;DR: In this paper, cellulose acetate (CA) supported iron and Pd/Fe nanoparticles were used for dechlorination of trichloroethylene (TCE) from water.
Journal ArticleDOI
Bi modified Pd/support (SiO2, Al2O3) catalysts for hydrodechlorination of 2,4-dichlorophenol
TL;DR: In this article, the influence of bismuth addition on the activity and selectivity of home-made supported palladium catalysts in the reaction of 2,4-dichlorophenol to phenol was studied.
Journal ArticleDOI
Novel one step preparation of silica supported Pd/Sr and Pd/Ba catalysts via an organometallic precursor: Application in hydrodechlorination and hydrogenation
TL;DR: In this paper, a gas phase hydrodechlorination (HDC) of chlorobenzene (CB) and 1,2-dichlorobenzenes (1-2-DCB) has been examined over Pd/SiO 2 (prepared by impregnation with Pd(C 2 H 3 O 2 ) 2 ) and two alkaline earth metal (AEM=Sr and Ba) promoted Pd-SiO2 catalysts prepared from the organometallic precursor {(DMF) x AEMPd(CN) 4 }
References
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Journal ArticleDOI
Bimetallic palladium catalysts: influence of the co-metal on the catalyst performance
Bernard Coq,François Figueras +1 more
TL;DR: In this article, the effect of co-metal on the performance of Pd in bimetallic catalysts is presented, and the main methods to prepare BMo catalysts through the unselective and selective depositions of the cometal precursor and the use of heterobinuclear complexes are highlighted.
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Conversion of chlorobenzene over palladium and rhodium catalysts of widely varying dispersion
TL;DR: In this paper, the authors investigated the kinetics of hydrodechlorination of chlorobenzene over Pd Al 2 O 3 and Rh Al 2O 3 catalysts of varying dispersion and proposed a reaction scheme which is formally analogous to the Mars-van Krevelen mechanism for the oxidation of hydrocarbons.
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Alloy catalysts: the concepts
TL;DR: In this paper, basic concepts are discussed which in last 30 years formed the background of the research on alloy catalysts and an attempt is made to describe the present state of understanding of the real and potential effects induced by alloying metals.
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Effects of metal-support interactions on the synthesis of methanol over palladium
TL;DR: In this paper, a Library Circulating Copy which may be borrowed for.two weeks is described, and the loaner is required to provide a copy of the book and a reference number.
Journal ArticleDOI
Conversion under hydrogen of dichlorodifluoromethane over supported palladium catalysts
TL;DR: In this paper, the conversion of difluorodichloromethane has been studied in the gas phase between 433 and 523 K at atmospheric pressure aver Pd black and Pd supported on alumina, graphite, or AlF3.