Method and apparatus for determining the amount of gas adsorbed

Measuring and testing – With fluid pressure – Porosity or permeability

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73432PS, G01N 1508

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active

044895933

ABSTRACT:
Methods for determining the amount of a gas adsorbed or desorbed from a solid sample wherein a gas is introduced or withdrawn from a sample containing chamber at a substantially constant mass flow rate while measuring the pressure change within said chamber as a function of time is disclosed. An apparatus for conducting said method which uses a mass flow controller is also disclosed.

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patent: 3850040 (1974-11-01), Orr et al.
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Robert J. Farrauto, "Determination and Applications of Catalytic Surface Area Measurements", AIChE Symposium Series No. 143, vol. 70, pp. 9-22, Jan. 15, 1975.
D. Dollimore et al., "The BET Method of Analysis of Gas Adsorption Data and its Relevance to the Calculation of Surface Areas", Surface Technology, vol. 4 (1976), pp. 121-160.
H. Bosch et al., "Automatic and Low-cost Determination of BET Surface Areas", Journal of Physics E. Scientific Instruments, vol. 10, pp. 605-608, (1977).
Bhat, R. et al., "A Simple Continuous Flow Apparatus for the Determination of Surface Area of Powders", Indian Journal of Technology, vol. 14, pp. 170-171, Apr. 1976.
M. G. Farey et al., "Determination of Surface Areas by an Improved Continuous Flow Method", Analytical Chemistry, vol. 43, No. 10, Aug. 1971, pp. 1307-1310.

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