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| Titel: |
MERCURY POROSIMETRY HYSTERESIS AND ENTRAPMENT PREDICTIONS BASED ON A CORRUGATED RANDOM PORE MODEL |
| Auteur: |
Tsetsekou, Athena Androutsopoulos, George Mann, Reginald |
| Verschenen in: |
Chemical engineering communications |
| Paginering: | Jaargang 110 (1991) nr. 1 pagina's 1-29 |
| Jaar: |
1991-12-01 |
| Inhoud: |
This paper advances the concept of mercury porosimetry hysteresis and entrapment, through the development of a probabilistic model simulating the mercury penetration-retraction operations, applied to a one-dimensional model of non-intersecting corrugated pores. The fundamental aspect on which the development of the model is based, is the experimentally observed phenomenon of mercury column breaking, occurring during its capillary flow along a corrugated pore. A mercury column is assumed to break and remain trapped within wide pore sections. Criterion for the entrapment to occur is the condition that the “pore constriction ratio A. ” defined as the ratio of a pore segment size and that of the next in the direction of mercury flow segment, to be lower than some critical value λc (O>λc >1). Theoretical predictions of the statistical model using a Normal, a Beta and a Bimodal probability density function as the intrinsic pore size distribution have shown that realistic hysteresis loops can be obtained and widely varied amounts (0-85%) of mercury entrapment can be predicted. The potential of the model has been also tested through the curve fitting of MP experimental data obtained on samples of three commercial HDS catalysts. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 8 van 13 gevonden artikelen
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