Computer-aided design separations

Industrial scale polymer forming operations are usually based on the combination of various types of individual processes. Therefore in the computer-aided design of these operations a section-by-section approach can be adopted, in which each section of a larger process is modelled separately. An important requirement in this approach is the imposition of realistic boundary conditions at the limits of the sub-sections of a complicated process. The division of a complex operation into simpler sections should therefore be based on a systematic procedure that can provide the necessary boundary conditions at the limits of its sub-processes. A rational method for the identification of the subprocesses of common types of polymer forming operations is described by Tadmor and Gogos (1979). 

The UNIQUAC equation developed by Abrams and Prausnitz is usually preferred to the NRTL equation in the computer aided design of separation processes. It is suitable for miscible and immiscible systems, and so can be used for vapour-liquid and liquid-liquid systems. As with the Wilson and NRTL equations, the equilibrium compositions for a multicomponent mixture can be predicted from experimental data for the binary pairs that comprise the mixture. Also, in the absence of experimental data for the binary pairs, the coefficients for use in the UNIQUAC equation can be predicted by a group contribution method UNIFAC, described below. 

Other exciting frontier areas of research in chemical engineering include molecular and nanoscale engineering, molecular simulation, surface modification, protein separation processes, supercritical fluid extraction, fluid particle systems, catalysis and reaction engineering, biochemical engineering, and computer-aided design, see also Careers in Chemistry. 

Part modeling is the historical area of computer aided design, drafting, and manufacturing. Traditionally, part models were constructed individually and each part model was stored in a separate file. Now, five different aspects integrate part modeling in a comprehensive product modeling environment. They are ... 

Mitkowski PT,Buchaly C,Rreis P, JonssonG,G6rak A and Gani R (2009), Computer aided design, analysis and experimental investigation of membrane assisted batch reaction-separation systems , Comput Chem Eng, 33,551-574. 

Computer-Aided Design of Separator Networks, a computer program . Catalogue of In-Company Short Courses, Books and Particle Technology Software, Fine Particle Software, The Lares, Maple Avenue, Cooden, Bexhill-on-Sea, TN39 4ST, (2000)... 

Svarovsky, J. and Svarovsky, L., Computer-aided design of separation networks . Powder Handling and Processing, Vol. 7, No. 3, 303-306, (July/Septemher 1995), also in Processing Part I, Trans Tech Publications, Clausthal-Zellerfeld, ISBN 0 87849 121 X, 119-122 (2000)... 

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