Journal article

The effects of sub-critical and super-critical carbon dioxide adsorption-induced coal matrix swelling on the permeability of naturally fractured black coal

MSA Perera, PG Ranjith, SK Choi, D Airey

Energy | PERGAMON-ELSEVIER SCIENCE LTD | Published : 2011

Abstract

Swelling of the coal matrix with the adsorption of CO is one of the leading problems for CO sequestration in deep coal seams as it causes coal seam permeability to be significantly reduced. The main objective of this study was to investigate the effect of coal mass swelling on the permeability of naturally fractured black coal. A series of permeability tests were conducted using a newly developed tri-axial apparatus on 38mm by 76mm naturally fractured black coal specimens. These tests were carried out for CO and N injections at 2-20MPa injection pressures under 10 to 24MPa confining pressures at 33°C. Each coal specimen was then allowed to swell under sub-critical and super-critical CO ..

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