Title: Method and apparatus for transporting coal as a coal/liquid carbon dioxide slurry

Abstract: Method and apparatus for transporting coal in finely divided form in a coal/liquid slurry. Liquid carbon dioxide, which can be formed by burning coal at the coal source point and liquefying the resulting gaseous carbon dioxide, serves as the slurry liquid. The slurry is pumped through a slurry pipeline to the coal use point under conditions of temperature and pressure to maintain the carbon dioxide in liquefied form. Subsequent to deslurrying, the coal-free carbon dioxide can be liquefied and returned through a liquid pipeline to the coal source point for reuse. The use of liquid carbon dioxide as a slurry medium is also applicable to transporting other finely divided solids such as ores and the like.

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Inventors: Santhanam, Chakra J. (Lexington, MA, US)

Application Number: 896167
Filing Date: 1978-04-14
Publication_date: 1980-06-10
Assignee: Arthur D. Little, Inc. (Cambridge, MA)
Primary Class(es): 62/50.1 62/54.1, 137/13, 406/154, 406/197, 423/437.1
Other Classes:
US Patent Ref:

2543170	Feb, 1951	Hill	62/55.
3719397	Mar, 1973	Wasp	302/66.
3730201	May, 1973	Lefever	62/55.
3810365	May, 1974	Hampton	62/48.
3870063	Mar, 1975	Hayward	62/55.
3933001	Jan, 1976	Muska	62/47.
3976442	Aug, 1976	Paull et al.	48/197.
3976443	Aug, 1976	Paull et al.	48/197.

Other Refs:
Primary Examiner: Capossela, Ronald C.
Assistant Examiner:
Attorney: Lepper; Bessie A.