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A Statistical Evaluation of Preparation conditions on the Performance of Ce-Promoted Co-Mo Fischer-Tropsch Catalyst
Reactor Engineering & Technology Group, School of Chemical Engineering & Industrial Chemistry, University of New South Wales, Sydney, NSW 2052, Australia
a.adesina@unsw.edu.au
Korean Journal of Chemical Engineering, January 2000, 17(1), 71-75(5), 10.1007/BF02789256
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Abstract
This paper describes a statistical approach to the optimal selection of preparation conditions for a ceria-promoted Co-Mo catalyst used during CO hydrogenation. Eight catalyst samples based on a full factorial design were prepared via incipient wetness method. Evaluation was carried out in laboratory packed bed reactor using synthesis gas containing H2:CO=2 at 280℃ and 110 kPa. BET was unaffected by pH although increased calcination temperature induced only a small drop in total surface area. More significantly, catalysis calcined at low temperature (350℃) suffered a 3-fold loss in metal surface area when treated at high temperatures (550℃) while an increase in pH improved the metal area value. pH values above the isoelectric point (IEP=5.65) and low calcination temperature favoured activity and alkene selectivity. High reduction temperature, however, appeared to enhance methane suppression. Additionally, 2-factor interactions were statistically more significant than 3-factor interactions at 95% confidence level. Optimisation of the polynomial models describing the response data was also consistent with qualitative inferences.
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Bessell S, Appl. Catal. A: Gen., 96, 253 (1993)
Box GEP, Hunter WG, "Statistics for Experimenters," Wiley, New York (1978)
Chen H, Ph.D. thesis, University of New South Wales, Sydney, Australia (1995)
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Cooper M, Frost J, Appl. Catal., 57, L5 (1990)
Huang YJ, Schwarz JA, Appl. Catal., 30, 239 (1987)
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Rankin JI, Bartholomew CH, J. Catal., 100, 526 (1986)
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