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vol.50 número1Styrene/1-alkene copolymerization by CpTiCl3-additive initiator systemsINTERACTION ENERGIES IN NON WATSON-CRICK PAIRS: AN AB INITIO STUDY OF G·U AND U·U PAIRS índice de autoresíndice de assuntospesquisa de artigos
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Journal of the Chilean Chemical Society

versão On-line ISSN 0717-9707


ORELLANA, F; PECCHI, G  e  REYES, P. SELECTIVE HYDRODECHLORINATION OF 1,2-DICHLOROETHANE OVER Pd-Sn/SiO2 CATALYSTS. J. Chil. Chem. Soc. [online]. 2005, vol.50, n.1, pp.431-434. ISSN 0717-9707.

Pd/SiO2 and Pd-Sn/SiO2 catalysts prepared by sol-gel processing have been characterised and tested in the selective hydrodechlorination of 1,2-dichloroethane. The obtained solids were characterised by N2 adsorption at 77 K, H2 chemisorption, temperature programmed reduction, and X-ray diffraction. It was found that the Pd surface atoms decreases upon the Sn addition, without critical changes on the specific area and reducibility. The turnover frequency increases continuously with the reaction temperature and also as tin loading increases. The selectivity to ethylene is strongly enhanced as temperature increases up to reach almost a constant value of 90 %, in the temperature range 500-600 K. It is proposed that Pd-SnOx are the active sites for the selective hydrodechlorination of 1,2-dichloroethane

Palavras-chave : Sol-gel; TEOS; hydrodechlorination; 1,2-dichloroethane; selectivity.

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