11 Result(s)
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Article
Synergy of Components in CuZnO and CuZnO/Al2O3 on Methanol Synthesis: Analysis at the Site Level by SSITKA
In the present study, the effects of the individual components and an Al2O3 support on CuZnO for methanol (MeOH) synthesis were investigated at the site level for the first time using steady-state isotopic transi...
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Article
Reaction Kinetics and Mechanisms for Hydrolysis and Transesterification of Triglycerides on Tungstated Zirconia
Hydrolysis and transesterification are two reactions which can occur during the synthesis of biodiesel. An Investigation of the mechanistic pathways in hydrolysis and transesterification were carried out at a ...
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Article
Effect of Support Crystallite Size on Catalytic Activity and Deactivation of Nanocrystalline ZnAl2O4-Supported Pd Catalysts in Liquid-Phase Hydrogenation
The catalytic activity and deactivation of nanocrystalline ZnAl2O4-supported Pd catalysts were investigated for the liquid-phase hydrogenation under mild conditions. Nanocrystalline ZnAl2O4 spinels with average c...
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Article
A comparative study of gas phase esterification on solid acid catalysts
For the first time, a comprehensive comparison of the intrinsic activities of solid acid catalysts in terms of turnover frequency (TOF) is reported for the gas-phase esterification of acetic acid with methanol...
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Article
Co-Support Compound Formation in Titania-Supported Cobalt Catalyst
Co-support compound formation (Co-SCF) in Co/TiO2 was found during standard reduction resulting in a lower reducibility of the catalyst. The compound formed is considered to be non-reducible at temperatures <800°...
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Article
Effect of Cobalt Precursors on the Dispersion of Cobalt on MCM-41
Co/MCM-41 catalysts were prepared using the incipient wetness impregnation technique with aqueous solutions of different cobalt compounds such as cobalt nitrate, cobalt chloride, cobalt acetate, and cobalt ace...
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Article
Cobalt Aluminate Formation in Alumina-Supported Cobalt Catalysts: Effects of Cobalt Reduction State and Water Vapor
This research was focused at getting deeper insight into the circumstances of “cobalt aluminate” formation in alumina-supported cobalt catalysts. It was desired to determine which state(s) of cobalt (i.e. redu...
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Article
n‐butane isomerization on sulfated zirconia: isotopic transient kinetic analysis of reaction at the site level
By using SSITKA (steady‐state isotopic transient kinetic analysis), n‐butane (n‐C4) isomerization on sulfated zirconia (SZ) has been studied for the first time at the site level. Accurate measures of the average ...
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Article
The formation of cobalt silicates on Co/SiO2 under hydrothermal conditions
A Co/SiO2 catalyst recovered after both gas and liquid phase Fischer-Tropsch synthesis exhibited significant decreases in the amount of reducible metal. Hydrothermal conditions similar to those occurring during F...
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Article
Isotopic tracing study of K promotion of NH3 synthesis on Ru
There has been much discussion based on indirect evidence about the site heterogeneity of catalysts for ammonia as well as the effect of alkali promotion. This paper presents the results from direct measuremen...
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Article
La and Zn promotion of Ru Fischer-Tropsch catalysts
An investigation of the use of La- and Zn-promoters for Ru/SiO2 F-T catalysts has been carried out. It was found that, while the use of a La-promoter did not result in any improvement over the use of a K one, Zn-...
