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Hydrogen reactivity toward carbon monoxide under mechanochemical processing

Delogu, Francesco and Garroni, Sebastiano and Mulas, Gabriele Raimondo Celestino (2010) Hydrogen reactivity toward carbon monoxide under mechanochemical processing. International Journal of Hydrogen Energy, Vol. 35 (9), p. 4375-4381. ISSN 0360-3199. Article.

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DOI: 10.1016/j.ijhydene.2010.02.075

Abstract

The study focuses on the hydrogenation of carbon monoxide over Co–Fe-based catalysts. The catalytic reactions were performed under both isothermal and mechanical activation conditions and their rates estimated by monitoring the gradual consumption of carbon monoxide. Aimed at carrying out a sound comparison, the rate of mechanically activated processes was referred to individual collisions by normalizing its value to the amount of powder involved in individual collisions and to the time interval of ongoing deformation. This allowed to point out that the amount of carbon monoxide converted per unit of catalyst mass and unit of time under mechanical activation conditions is at least four orders of magnitude larger than the one reacted under thermal activation conditions. This result is tentatively connected with the generation of local excited states at the catalyst surface.

Item Type:Article
ID Code:5636
Status:Published
Refereed:Yes
Uncontrolled Keywords:Mechanochemistry, hydrogenation, kinetics
Subjects:Area 03 - Scienze chimiche > CHIM/02 Chimica fisica
Divisions:001 Università di Sassari > 01 Dipartimenti > Chimica
Publisher:Pergamon / Elsevier
ISSN:0360-3199
Copyright Holders:© 2010 Professor T. Nejat Veziroglu Published by Elsevier
Deposited On:09 Mar 2011 09:03

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