Pipeline transportation of coarse coal-liquid carbon dioxide slurry
AssigneeArthur D. Little, Inc.
InventorsChakra J. Santhanam, Richard W. Hanks, R. Peter Stickles
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Abstract
A method and composition are provided for transporting coarse particles of coal in a dense liquid CO.sub.2 media. The dense media contains fine particles of densifying material such as coal or magnetite which form a suspension in the liquid CO.sub.2. The suspension is capable of supporting large particles of coal for transportation in a liquid CO.sub.2 slurry pipeline. Use of the dense media allows the pumping of the coarse coal particles at slower velocities than if the fine densifying particles were not present.
Claims5
A method for the pipeline transportation of coarse particles of coal which are too large to form a stable slurry in liquid CO.sub.2, comprising the steps of:
- (a) slurrying coarse particles of coal up to 3/4-inch in diameter with a dense liquid CO.sub.2 media in an amount of 40-60% of coarse coal particles with respect to the dense media;
- said dense media formed by incorporating fine coal particles in liquid CO.sub.2 in an amount of 30-50% with respect to the liquid CO.sub.2 ;
- said fine particles capable of forming a stable suspension in liquid CO.sub.2 whereby the coarse particles may be transported in the dense media by means of a pipeline;
- (b) introducing the slurry into a pipeline;
- and
- (c) flowing the slurry through the pipeline.
Dependencies are inferred from the claim text.