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Hydrodechlorination of Tetrachloromethane on Alumina- and Silica-supported Platinum Catalysts by Magdalena Bonarowska; Zbigniew Kaszkur; Leszek Kępiński; Zbigniew Karpiński is a Energy article available to read on EtoBox.

What is Hydrodechlorination of Tetrachloromethane on Alumina- and Silica-supported Platinum Catalysts about?

Two series of alumina-and silica-supported platinum catalysts, representing a wide range of metal dispersion were characterized by CO chemisorption, XRD and TEM, and investigated in the hydrodechlorination of tetrachloromethane at 343-363 K. Catalytic activity of Pt/Al 2 O 3 in CCl 4 hydrodechlorination shows very strong inverse relationship with metal dispersion; highly dispersed Pt samples exhibit very low turnover frequencies. Similar, but much milder trend, was found for silica-supported Pt catalysts. This significant support effect on the catalytic behavior was attributed to an extensive surface chloriding of small Pt particles interacting with Lewis acid sites of ␥-alumina. It is suggested that such interactions lead to formation of electrodeficient Pt sites, which are quickly blocked by produced chloride species. On silica, similar in kind metal-support interactions do not occur, and, in effect, deactivation of Pt/SiO 2 catalysts is much less marked. Very strong dependence of catalytic activity of alumina-supported platinum on metal dispersion implies that even very small changes in Pt particle size dispersion during reaction and catalyst regeneration should not be ignored i

Who reads Hydrodechlorination of Tetrachloromethane on Alumina- and Silica-supported Platinum Catalysts?

Author

Magdalena Bonarowska; Zbigniew Kaszkur; Leszek Kępiński; Zbigniew Karpiński

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0926-3373)

Published

2010

Language

EN

Field

Energy (Physical Sciences)