Thesis (M.Sc.(Chemical Engineering))--University of the Witwatersrand, Faculty of Engineering, 1987. / Experimental work showed that the adsorption of the aurocyanide
ion by activated carbon is under film diffusion
control until the carbon reaches 70 per cent of its
equilibrium loading capacity. A rate expression based on
the classical film diffusion rate expression is suggested
and the model for the batch test developed. The proposed
model is shown to simulate batch adsorption tests at
different ratios of carbon mass to solution volume.
The mass transfer coefficient was linked to the carbon
particle size and agitation rato by the use of dimensionless
numbers. Correlations are suggested for fixed beds,
fluidized beds and rolling bottles. It was determined
experimentally that, at equivalent Reynolds numbers, the
fixed bed provides the optimum system for mass transfer.
| Identifer | oai:union.ndltd.org:netd.ac.za/oai:union.ndltd.org:wits/oai:wiredspace.wits.ac.za:10539/17499 |
| Date | 22 April 2015 |
| Creators | Johns, Mark William |
| Source Sets | South African National ETD Portal |
| Language | English |
| Detected Language | English |
| Type | Thesis |
| Format | application/pdf, application/pdf, application/pdf, application/pdf, application/pdf, application/pdf, application/pdf, application/pdf |
Page generated in 0.0023 seconds