Comparison of Bimetallic and Trimetallic Catalyst in Reductive Dechlorination; Influence of Copper Addition

0446222 - ÚCHP 2016 RIV DE eng J - Journal Article
Kaštánek, František - Kaštánek, Petr - Maléterová, Ywetta - Kallistová, A. - Šolcová, Olga
Comparison of Bimetallic and Trimetallic Catalyst in Reductive Dechlorination; Influence of Copper Addition.
Journal of Multidisciplinary Engineering Science and Technology. Roč. 2, č. 7 (2015), s. 1954-1958. ISSN 2458-9403. E-ISSN 3159-0040
R&D Projects: GA TA ČR TA04020700
Institutional support: RVO:67985858 ; RVO:67985831
Keywords : PCB * reductive dechlorination * bimetallic and trimetallic catalysts
Subject RIV: CI - Industrial Chemistry, Chemical Engineering
http://www.jmest.org/wp-content/uploads/JMESTN42350950.pdf

Efficiency of reduction of PCBs in aqueous solution was examined with bimetallic catalyst Fe-C/Pd consisting of palladized grey cast iron and with a new trimetallic catalyst (Cu-Fe-C/Pd) consisting of a copper metal plate with microparticles of palladized grey iron (bimetallic catalyst). PCB solutions were prepared using DELOR 103. The trimetallic catalyst was significantly efficient than bimetallic one. Trimetallic catalyst reduced the concentration of PCB to approximately 1% of its initial value during 70 minutes and bimetallic during 240 hours. More than 20% of unreacted PCBs were found adsorbed on the surfaces of the bimetallic catalysts. Presence of metal copper accelerates formation of the oxidation products and their release from the catalyst surface as the flocks recovers activity of the trimetallic catalyst. It means the reductive dechlorination of PCB is not the only decisive control step in the reduction of PCB in water by zero valence metals.
Permanent Link: http://hdl.handle.net/11104/0248211