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Please use this identifier to cite or link to this item: http://dspace.library.iitb.ac.in/jspui/handle/10054/11673

Title: ADDITION OF MANGANESE TO IRON CATALYSTS SUPPORTED ON SILICALITE-1 AND ITS EFFECT ON CO HYDROGENATION
Authors: RAVICHANDRAN, G
DAS, D
CHAKRABARTY, DK
Keywords: fischer-tropsch synthesis
carbon-monoxide
synthesis gas
lower olefins
zeolite
oxide
conversion
chemistry
reduction
fe
Issue Date: 1994
Publisher: ROYAL SOC CHEMISTRY
Citation: JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS, 90(13), 1993-1998
Abstract: The addition of manganese to iron catalysts supported on silicalite-1 increases the selectivity of the catalysts to alkenes in CO hydrogenation. The catalysts were prepared by impregnating the support with metal nitrates followed by calcination and in situ reduction in hydrogen. The Mossbauer spectra of the calcined samples showed that the addition of manganese reduced the size of the alpha-Fe2O3 particles. This was confirmed by XRD and TPR results. The active phase consists of. Hagg carbide and some oxides of Fe(III), the latter being responsible for the increased alkene formation. The role of manganese is to reduce the particle size of the iron oxide precursor, making carburization unfavourable. This leads to an increase in the amount of the oxide phase in the catalyst, thereby increasing the selectivity to alkenes.
URI: http://dx.doi.org/10.1039/ft9949001993
http://dspace.library.iitb.ac.in/xmlui/handle/10054/11673
http://hdl.handle.net/10054/11673
ISSN: 0956-5000
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