کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1485796 | 1510553 | 2006 | 12 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Methods for the preparation of bimetallic xerogel catalysts designed for chlorinated wastes processing Methods for the preparation of bimetallic xerogel catalysts designed for chlorinated wastes processing](/preview/png/1485796.png)
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.
Journal: Journal of Non-Crystalline Solids - Volume 352, Issues 26–27, 1 August 2006, Pages 2751–2762