Document Type


Date of Award


Degree Name

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


Chemical Engineering

First Advisor

C. L. Mantell

Second Advisor

George C. Keeffe

Third Advisor

Saul I. Kreps


A low temperature gas adsorption apparatus was designed for the purpose of measuring the total surface area of solids using the well known B.E.T. method.

The apparatus was designed so that several different gases could be used as adsorbates without evacuating the gas reservoirs each time a different adsorbate was to be used. This was accomplished by providing three gas reservoirs of sufficient capacity to allow several determinations to be made at moderate initial reservoir pressures of from two to three pounds per square inch. A separate bulb and manometer system was supplied for determining the saturation pressures of adsorbates used. Although the primary objective was to determine the surface area of expanded perlite, the gas burette volumes of the apparatus were designed large enough to permit the evaluation of surface areas over a wide range of values.

Several samples with known areas were checked using N2 as the adsorbate to establish confidence factors and the values for the surface areas of several perlite samples are reported.



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