Mercury porosimetry in the pressure range l-1000 atm was applied to a series of coals (72\*7-93\*2% carbon). Pore volume deduced from mercury penetration was compared with that from density measurement with mercury and n-hexane. It was suggested that the apparent increase of pore volume above the pr
Mercury porosimetry study of oxyhumolith
โ Scribed by Jan Kloubek
- Publisher
- Elsevier Science
- Year
- 1993
- Tongue
- English
- Weight
- 622 KB
- Volume
- 31
- Category
- Article
- ISSN
- 0008-6223
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โฆ Synopsis
Porous structure of oxyhumolith and of its product obtained after heating at 200ยฐC has been investigated using intrusion, reintrusion, and retention volumes obtained by mercury porosimetry. The generally applied evaluation of pore radii is shown to be incorrect. In the heated sample, the interconnection in the porous network is improved by a widening of constrictions between the cavities. However, heating affects mostly the external surface. Comments on the method of mercury porosimetry exploitation and evaluation are included.
๐ SIMILAR VOLUMES
Mercury porosimetry was used to study changes in the pore structure of three western Canadian low-rank coals treated in three different atmospheres (nitrogen, steam and combustion products) at temperatures up to 500ยฐC. The intrusion curves are well described by two different power laws in the pressu
Coals of increasing rank contain a mixture of solid fragments and particles which look liquid. The first ones are a fractions insoluble in boiling anthracene-oil, the others are /I fractions (soluble in anthracene-oil but insoluble in toluene). The content of fi fraction passes by a maximum as softe
Mercury porosimetry is described as a method for rapid and detailed prediction of the water-ice phase fraction in porous media. The mercury volume-intrusion pressure approximates the functional dependence of the ice volume-temperature curve in the range most important for frost heave, i.e., within a