Document Type


Date of Award


Degree Name

Master of Science in Chemical Engineering - (M.S.)


Chemical Engineering and Chemistry

First Advisor

Chen, Hung T.

Second Advisor

Perna, Angelo J.

Third Advisor

Hanesian, Deran


A correlation was developed for estimating binary gas diffusion coefficients by the reference substance method, in this case using the viscosity of air and subsequently its corresponding temperature. The derivation was made by the linear least square analysis of 65 different binary systems comprising 161 separate data points at temperatures ranging from 193°K. to 1200°K. At any given temperature only the critical molal volume and the molecular weights of the two gases of interest are required to calculate the diffusion coefficient. The correlation based on the viscosity of air had an average error of 7.67%. The correlation using temperature had an average error of 6.89%. Also developed wars equations to predict the diffusion coefficient at any temperature when the coefficient is known at 298°K., and to predict the coefficient of any system when the coefficient is known for any other system containing one com-ponent of the desired pair.



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