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There has been much interest in alternative fuels made from coal which is much more abundant than oil. The coal–oil–water slurry is a new type of oil-based synfuel composed of finely pulverized coal, oil and water. It has lower viscosity, lower ignition point and higher heating value than coal–water slurry. The preparation of stable water-in-oil (W/O) emulsion is critical for the success of production...
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