Distillation of a Binary Mixture in the Centrifugal Molecular Still

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.<br/><br/>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.<br/><br/>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.<br/><br/>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.<br/><br/>In order to solve the mathematical model, it was also necessary to evaluate experimentally some physical property data of the binary mixture.<br/><br/>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.<br/>

Name dc:type.qualificationname

Doctoral Thesis

Level dc:type.qualificationlevel

Student thesis

Grantor dc:publisher.institution

Polytechnic of Wales

Year dc:date.issued

1982

Author dc:creator

• Murad, Adnan

Language dc:language

eng

Identifier

oai:pure.atira.dk:studenttheses/4ea3447d-d3c6-4646-a225-cc5473f4d667

OAI identifier oai:identifier

oai:pure.atira.dk:studenttheses/4ea3447d-d3c6-4646-a225-cc5473f4d667