[Todos] HOY, LUNES 6/6 13hs:Seminarios DQIAQF - INQUIMAE

[Graciela A. González]

> Seminarios DQIAQF - INQUIMAE,  lunes 06 de junio - 13 hs.
>
> Aula de Seminarios INQUIMAE - DQIAQF
> Facultad de Ciencias Exactas y Naturales
> Ciudad Universitaria - Pab. 2  -  Piso 3
>
> Adrián Bonivardi
>
> “The rol of galia in methanol synthesis and of ceria based materials in
> pure hydrogen production”
>
> Prediction of catalytic performance on “real” catalysts requires an
> intensive experimental work on powder catalysts that includes the scrutiny
> and uncoupling of different variables involved in the process . Our
> approach will be outlined in the case of
> methanol synthesis from carbon oxides on Pd-Ga2O3 based catalysts.
> Results of catalytic activity tests on a Berty-type reactor are modeled
> using a mechanism derived mainly from intensive infrared spectroscopy
> data. Low
> and high-pressure transmission infrared studies of the mechanism of the
> CO2 hydrogenation are presented. It is proposed that (bi)carbonate species
> on gallia surface are sequentiatly hydrogenated to formate,
> methilenbisoxide and methoxy groups by hydrogen which spillovers from
> palladium surface sites. Additionally, the detrimental effect of carbon
> monoxide is considered into the model to explain the lower productivity to
> methanol. The role of formate species is supported by means of periodic
> DTF calculations. Next, new results on ceria based materials used as
> supports in the study of the water gas shift and carbon monoxide
> preferential oxidation reactions for the purification of hydrogen also
> will be considered.
>
>