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Effect of pore size on adsorbate condensation and hysteresis within a potential model adsorbent: M41S

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Schüth,  F.
Institut für Anorganische und Analytische Chemie, Joh. Gutenberg Universitat, D-55099 Mainz, Germany;
Research Department Schüth, Max-Planck-Institut für Kohlenforschung, Max Planck Society;

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Citation

Llewellyn, P., Grillet, Y., Schüth, F., Reichert, H., & Unger, K. (1994). Effect of pore size on adsorbate condensation and hysteresis within a potential model adsorbent: M41S. Microporous and Mesoporous Materials, 3(3), 345-349. doi:0.1016/0927-6513(94)00042-5.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0024-4BAA-F
Abstract
The use of M41S (MCM-41) materials, which have cylindrical-like mesopores, has highlighted the effect of pore diameter on the position, presence and size of the hysteresis loop observed in association with argon and nitrogen adsorbate-adsorbate co-operative condensation. A distinct step in the adsorption isotherm was observed for each of three materials with varying pore diameters (2.5, 4.0 and 4.5 nm). An increase in the pore size leads to a shift in this step to higher relative pressures and to the appearance of a significant hysteresis loop. This may indicate the transition from secondary micropores to mesopores with respect to the nitrogen adsorbate.