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PREPARATION OF Co/Si02 SPHERICAL MODEL NANOCATALYST USING REVERSE MICROEMULSION METHOD

RAJ AN THIRAN, SIVERANJINI (2010) PREPARATION OF Co/Si02 SPHERICAL MODEL NANOCATALYST USING REVERSE MICROEMULSION METHOD. Universiti Teknologi PETRONAS. (Unpublished)

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Abstract

Fischer-Tropsch (FT) synthesis is one of the components of Gas-to-Liquid (GTL), Biomass-toLiquids (BTL) and Coal-to-Liquids (CTL) technologies. Catalyst is a very important part of a Fischer-Tropsch process. This FT process also uses Cobalt as the catalyst. Cobalt is usually favored for lower temperature Fischer-Tropsch synthesis because it has higher stability, higher per single pass conversion, higher yield, smaller negative effect on water conversion and higher resistance to erosion compared to iron. There are few ways of preparing the Cobalt catalyst; colloidal method, impregnation method, deposition-precipitation method, sol-gel method and also microemulsion method. The most common method is incipient wetness impregnation using cobalt salt. There are many studies, methods and techniques that have been developed to synthesize catalysts with the catalytically active material in the required size range. Catalyst performance can be improved by tuning the crystallite size distribution for the required reaction. In order to achieve the desired size, it needs a control of the crystallite size distribution and also understanding of the fundamental principles and process variables in the synthesis of these materials. Microemulsion method allows formation of particles in nano-size range with a small size distribution. The waterto- surfactant molar ratio (Wo) can also be changed to vary the size of the reversed microemulsions by using the water-in-oil microemulsion method. This method can be used to control the particle size. The catalyst is prepared using reverse microemulsion method and studies were conducted on the effect of various amount cobalt loading content and various calcination temperatures. Apart from that, several techniques are used to characterize the properties of the prepared catalyst which includes TPR, FESEM and XRD. Experimental results indicated that high calcination at 450°C and higher cobalt loading at 6wt% produces good nanocatalyst.

Item Type: Final Year Project
Academic Subject : Academic Department - Chemical Engineering - Reactor Technology
Subject: T Technology > TP Chemical technology
Divisions: Engineering > Chemical
Depositing User: Users 2053 not found.
Date Deposited: 08 Jan 2014 08:31
Last Modified: 08 Jan 2014 08:31
URI: http://utpedia.utp.edu.my/id/eprint/10772

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