Swelling effect on coal micro structure and associated permeability reduction

Impact of transition from local swelling to macro swelling on the evolution of coal permeability

The Effects of Gas Adsorption on Swelling, Visco-plastic Creep and Permeability of Sub-bituminous Coal

Unmineable coal is an important resource because of its potential to produce coalbed methane (CBM). CBM has grown to supply approximately 10% of US natural gas production and is becoming important worldwide as an energy source [1]. Furthermore, when CO2 is injected, it has the potential to enhance the amount of methane produced (ECBM) and to geologically sequestrate CO2 as an adsorbed phase. Th...

Estimation of coal swelling index based on chemical properties of coal using artificial neural networks

Free swelling index (FSI) is an important parameter for cokeability and combustion of coals. In this research, the effects of chemical properties of coals on the coal free swelling index were studied by artificial neural network methods. The artificial neural networks (ANNs) method was used for 200 datasets to estimate the free swelling index value. In this investigation, ten input parameters ...

Permeability changes associated with osmotic swelling of bacterial protoplasts.

Bacterial protoplasts, released from confinement within the rigid wall of whole cells, imbibe water, swell, and burst unless their suspending medium contains high concentrations of solutes which have difficulty crossing the osmotic barrier in the protoplast surface membrane (C. Weibull, Exptl. Cell Res. 9:139, 1955; P. Mitchell and J. Moyle, J. Gen. Microbiol. 20:434, 1959). Hence, protoplast p...

Effect of Pretreatment on Pyritic Sulphur Reduction from Coal

Biological attack of pyrite is a potential method of reducing pyritic sulphur in coal. Integration of such attacks with microwave pretreatment can enhance the efficiency of the process. Alternatively, processes such as oil-agglomeration can be coupled with the biological attack to obtain higher rates of pyritic sulphur removal. In this study desulphurization of Indian (Assam) coal was carried o...