Study of cyclohexanol decomposition reaction over the ferrospinels, A1−xCuxFe2O4 (A=Ni or Co and x=0, 0.3, 0.5, 0.7 and 1), prepared by ‘soft’ chemical methods

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Study of cyclohexanol decomposition reaction over the ferrospinels, A1−xCuxFe2O4 (A=Ni or Co and x=0, 0.3, 0.5, 0.7 and 1), prepared by ‘soft’ chemical methods

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dc.contributor.author Ramankutty, C.G
dc.contributor.author Sugunan, S
dc.contributor.author Bejoy, Thomas
dc.date.accessioned 2011-09-15T06:14:41Z
dc.date.available 2011-09-15T06:14:41Z
dc.date.issued 2002-09-09
dc.identifier.issn 1381-1169
dc.identifier.other Journal of Molecular Catalysis A: Chemical Volume 187, Issue 1, 9 September 2002, Pages 105-117
dc.identifier.uri http://dyuthi.cusat.ac.in/purl/2278
dc.description.abstract Preparation of simple and mixed ferrospinels of nickel, cobalt and copper and their sulphated analogues by the room temperature coprecipitation method yielded fine particles with high surface areas. Study of the vapour phase decomposition of cyclohexanol at 300 °C over all the ferrospinel systems showed very good conversions yielding cyclohexene by dehydration and/or cyclohexanone by dehydrogenation, as the major products. Sulphation very much enhanced the dehydration activity over all the samples. A good correlation was obtained between the dehydration activities of the simple ferrites and their weak plus medium strength acidities (usually of the Brφnsted type) determined independently by the n-butylamine adsorption and ammonia-TPD methods. Mixed ferrites containing copper showed a general decrease in acidities and a drastic decrease in dehydration activities. There was no general correlation between the basicity parameters obtained by electron donor studies and the ratio of dehydrogenation to dehydration activities. There was a leap in the dehydrogenation activities in the case of all the ferrospinel samples containing copper. Along with the basic properties, the redox properties of copper ion have been invoked to account for this added activity. en_US
dc.language.iso en en_US
dc.publisher Elsevier en_US
dc.subject Cyclohexanol decomposition en_US
dc.subject Ferrospinels en_US
dc.subject Sulphated ferrospinels en_US
dc.subject Copper containing ferrites en_US
dc.subject Catalysis by spinels en_US
dc.title Study of cyclohexanol decomposition reaction over the ferrospinels, A1−xCuxFe2O4 (A=Ni or Co and x=0, 0.3, 0.5, 0.7 and 1), prepared by ‘soft’ chemical methods en_US
dc.type Working Paper en_US
dc.contributor.faculty Science en_US
dc.identifier.url http://www.sciencedirect.com/science/article/pii/S1381116902001218 en_US


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