Abstract
Victorian brown coal has a strong affinity for water. It exhibits high monolayer water capacities (MWC) and non-freezing water contents (NFW). In electricity generation, a large amount of brown coal is burnt (and CO2 liberated) just to dry the coal. Thus, an understanding of coal-water interactions and how they change during drying is essential for the reduction of CO2 emissions. This paper evaluates different methods for determining MWC and NFW including isotherm construction in desiccators and in anlntelligent Gravimetric Analyser (IGA), and determination of NFW by 1H NMR and Differential Scanning Calorimetry (DSC). Attempts to correlate these values with coal structure, particularly coal acidity, are described. An improved method for the determination of coal acidity is included.
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Clemow, L.M., Jackson, W.R., Chaffee, A.L., Sakurovs, R., Allardice, D.J. (2002). Understanding Brown Coal-Water Interactions to Reduce Carbon Dioxide Emissions. In: Maroto-Valer, M.M., Song, C., Soong, Y. (eds) Environmental Challenges and Greenhouse Gas Control for Fossil Fuel Utilization in the 21st Century. Springer, Boston, MA. https://doi.org/10.1007/978-1-4615-0773-4_15
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DOI: https://doi.org/10.1007/978-1-4615-0773-4_15
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