catalysis; nuclear and chemical wastes; silica; sol-gels (xerogels)
Abstract :
[en] The aim of this work is to simplify and generalize the synthesis procedure of bimetallic supported catalysts by sol-gel process. For Pd-Ag/SiO2, co-gelled xerogels catalysts a number of synthesis procedures were compared: use of one or two specific alkoxides able to form a chelate with palladium and/or silver cations, reagent mixing in one or two steps, use of industrial grade chemicals instead of laboratory grade chemicals. The catalysts obtained are quite similar: same metal dispersion, same tailored morphology, same localization and accessibility of Pd-Ag alloy nanoparticles inside microporous silica, same activity and selectivity for hydrodechlorination of 1,2-dichloroethane into ethylene. For catalyst production at large scale the synthesis can be achieved in one step with 3-(2-aminoethyl)aminopropyltrimethoxysilane of industrial grade as chelating alkoxide, tetraethylorthosilicate (TEOS) of industrial grade and ethanol denatured with diethyl phthalate. (c) 2006 Elsevier B.V. All rights reserved.
Disciplines :
Chemistry Materials science & engineering Chemical engineering
Author, co-author :
Lambert, Stéphanie ; Université de Liège - ULiège > Département de chimie appliquée > Génie chimique - Génie catalytique
Heinrichs B., Lambert S., Alié C., Pirard J.P., Beketov G., Nehasil V., and Kruse N. In: Gaigneaux E., De Vos D.E., Grange P., Jacobs P.A., Martens J.A., Ruiz P., and Poncelet G. (Eds). Scientific Bases for the Preparation of Heterogeneous Catalysts. Studies in Surface Science and Catalysis vol. 143 (2002), Elsevier, Amsterdam 25
Borovkov V.Y., Luebke D.R., Kovalchuk V.I., and d'Itri J.L. J. Phys. Chem. B 107 (2003) 5568
Lambert S., Ferauche F., Brasseur A., Pirard J.P., and Heinrichs B. Catal. Today 100 (2005) 283
Heinrichs B., Pirard J.-P., and Schoebrechts J.-P. AIChE J. 47 (2001) 1866
Lambert S., Cellier C., Grange P., Pirard J.-P., and Heinrichs B. J. Catal. 221 (2004) 335
Brinker C.J., and Scherer G.W. Sol-Gel Science: The Physics and Chemistry of Sol-Gel Processing (1990), Academic, San Diego
Rouquerol J., Avnir D., Fairbridge C.W., Everett D.H., Haynes J.H., Pernicone N., Ramsay J.D.F., Sing K.S.W., and Unger K.K. Pure Appl. Chem. 66 (1994) 1739
Bergeret G., and Gallezot P. In: Ertl G., Knözinger H., and Weitkamp J. (Eds). Handbook of Heterogeneous Catalysis vol. 2 (1997), Wiley-VCH, Weinheim 464
Heinrichs B., Noville F., Schoebrechts J.-P., and Pirard J.-P. J. Catal. 192 (2000) 108
Ponec V., and Bond G.C. Catalysis by Metals and Alloys (1995), Elsevier, Amsterdam
Lambert S., Polard J.-F., Pirard J.-P., and Heinrichs B. Appl. Catal. B 50 (2004) 127
Heinrichs B., Schoebrechts J.-P., and Pirard J.-P. J. Catal. 200 (2001) 309
Bergeret G., and Gallezot P. In: Ertl G., Knözinger H., and Weitkamp J. (Eds). Handbook of Heterogeneous Catalysis vol. 2 (1997), Wiley-VCH, Weinheim 439
Alié C., Pirard R., Lecloux A.J., and Pirard J.-P. J. Non-Cryst. Solids 246 (1999) 216
Alié C., Pirard R., Lecloux A.J., and Pirard J.-P. J. Non-Cryst. Solids 285 (2001) 135
Gommes C., Blacher S., Goderis B., Pirard R., Heinrichs B., Alié C., and Pirard J.-P. J. Phys. Chem. B. 108 (2004) 8983
Lambert S., Alié C., Pirard J.-P., and Heinrichs B. J. Non-Cryst. Solids 342 (2004) 70
Soma-Noto Y., and Sachtler W.M.H. J. Catal. 32 (1974) 315
Yamane M. In: Klein L.C. (Ed). Sol-Gel Technology for Thin Films. Fibers, Preforms, Electronics and Specialty Shapes (1988), Noyes Publications, Park Ridge, NJ 200
Kuijers F.J., and Ponec V. J. Catal. 60 (1979) 100
