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Sequentially Compressive and Intrusive Mechanisms in Mercury Porosimetry of Carbon Blacks

โœ Scribed by R Pirard; B Sahouli; S Blacher; J.-P Pirard

Publisher
Elsevier Science
Year
1999
Tongue
English
Weight
39 KB
Volume
217
Category
Article
ISSN
0021-9797

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โœฆ Synopsis

The mechanism of mercury penetration in two different commercial carbon blacks is studied. We show that the volume variation measured by mercury porosimetry in these systems is due to three successive mechanisms, which occur as the pressure increases: (1) mercury invasion of voids between macroscopic grains, (2) compaction and elastic compression of macroscopic grains, (3) intrusion in the voids of aggregates formed by primary particles. The cumulative surface calculated by the Rootare-Prenzlow equation (S RP ) in the intrusion part and the BET surface area measured by nitrogen adsorption (S BET ) are compared.

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