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Preferential CO oxidation by mounted and un-mounted precious metal based catalyst
2005 (engelsk)Inngår i: International journal of hydrogen energy, ISSN 0360-3199, E-ISSN 1879-3487, Vol. 30, nr 11, s. 1235-1242Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

A number of different noble metal catalysts were studied for activity in the preferential oxidation of carbon monoxide in hydrogen-rich streams. The prepared catalysts had an active phase of platinum, palladium, iridium, ruthenium or rhodium impregnated either directly on an aluminia matrix or mounted on nickel or cobalt oxide. The catalysts were studied for activity, but also for the reversed water gas shift side reaction. The most active catalyst was platinum mounted on cobalt oxide and it was studied closely. The platinum on the cobalt oxide was studied using STEM with XEDS and the effects of the platinum cluster size were investigated. Via microscopy it was possible to show that platinum had no preference for either alumina or cobalt. The activity increased with increasing platinum cluster size but the selectivity passed through a maximum, a probable deactivation mechanism to the catalyst on stream, showed on a 1,000 h deactivated sample.

sted, utgiver, år, opplag, sider
Elsevier , 2005. Vol. 30, nr 11, s. 1235-1242
HSV kategori
Forskningsprogram
Naturvetenskap, Bioteknik
Identifikatorer
URN: urn:nbn:se:lnu:diva-7388DOI: 10.1016/j.ijhydene.2005.04.054OAI: oai:DiVA.org:lnu-7388DiVA, id: diva2:344029
Tilgjengelig fra: 2010-08-17 Laget: 2010-08-17 Sist oppdatert: 2017-12-12bibliografisk kontrollert

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