n this study we investigated the mechanochem. hydrogenation of carbon monoxide over nanostructured FeCo- and Mg2Ni-based catalysts. To this aim powd. materials, prepd. by mech. alloying, were subjected to mech. treatment under CO + H2 atmosphere. A methodol. to evaluate the activity of the solid catalysts on an abs. basis was developed. Conversion data were, indeed, expressed as turnover frequency, TOF, and related to the occurrence of ball to powder collision events through the mechanochem. turnover frequency parameter, MTOF. Differences in the catalytic activity and selectivity were obsd. for the two FeCo-based studied systems, the solid soln. Fe50Co50 and its dispersion on TiO2 support. As for the Mg2Ni system, we explored the possibility to est. the specific role of hydrogen pre-activation step. The catalytic properties of the mech. alloyed Mg2Ni system were compared with the conversion data shown by the same system pre-hydrogenated and subsequently milled under CO atm
Hydrogenation of carbon monoxide over nanostructured systems: a mechanochemical approach
MILANESE, CHIARA
2011-01-01
Abstract
n this study we investigated the mechanochem. hydrogenation of carbon monoxide over nanostructured FeCo- and Mg2Ni-based catalysts. To this aim powd. materials, prepd. by mech. alloying, were subjected to mech. treatment under CO + H2 atmosphere. A methodol. to evaluate the activity of the solid catalysts on an abs. basis was developed. Conversion data were, indeed, expressed as turnover frequency, TOF, and related to the occurrence of ball to powder collision events through the mechanochem. turnover frequency parameter, MTOF. Differences in the catalytic activity and selectivity were obsd. for the two FeCo-based studied systems, the solid soln. Fe50Co50 and its dispersion on TiO2 support. As for the Mg2Ni system, we explored the possibility to est. the specific role of hydrogen pre-activation step. The catalytic properties of the mech. alloyed Mg2Ni system were compared with the conversion data shown by the same system pre-hydrogenated and subsequently milled under CO atmI documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.