Abstract
ABSTRACTStudies on rheological behavior of coal–oil mixtures up to 50% concentration by weight of coal have been carried out using Indian coals of varying ash content. Both high-viscous and low-viscous oils have been used with a temperature variation from 30°C to 70°C. Viscosity was measured using a Haake RV 100 rotational viscometer with an MV II sensor system. For a coal–high-viscous-oil system, a generalized correlation correlating relative viscosity of slurry to coal concentration and density of solid is proposed. For a coal–low-viscous-oil system, an empirical equation correlating suspension viscosity with a non-dimensional parameter Cv/Cvmax with temperature variation has been proposed.
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