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Title: Distillation of a binary mixture in the centrifugal molecular still
Author: Murad, Adnan
ISNI:       0000 0001 3432 2591
Awarding Body: Polytechnic of Wales
Current Institution: University of South Wales
Date of Award: 1982
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This thesis describes an investigation of the transport phenomena of a binary mixture over a rotating disk and under conditions of molecular distillation. These phenomena were studied using a modified version of the commercially designed centrifugal molecular still, CMS-5. A mathematical model was developed which relates the equations of maximum evaporation rate, heat and mass transfer of the transport behaviour of fluid on a rotating disk to such parameters as mass flow rate, composition, film thickness, mean velocity, Reynolds number, surface temperature, and relative volatility. Numerical techniques have been used in solving the model, and from the computed and the experimentally measured values, it was possible to evaluate the performance of the still in terms of the theoretical molecular plate. The mathematical model is also capable of predicting the mean distillation rate and composition of distillate. Reasonable agreement was obtained between the measured and calculated values. In order to solve the mathematical model, it was also necessary to evaluate experimentally some physical property data of the binary mixture. Mean rates of distillation and compositions of distillate of the binary mixture (di-2-ethylhexyl phthalate - di-2-ethylhexyl sebacate) were measured for a set of feed compositions over a range of temperatures and feed rates. The overall performance of the centrifugal still and the binary mixture were evaluated.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available
Keywords: Chemistry, general