Colloidal fuel

Colloidal fuel is an emulsion of powdered coal in kerosene or fuel oil. It was used in World War I aboard ships as kerosene supplies ran low.[1]

Development continued after the war, and in 1932 the Cunard liner Scythia made a round-trip transatlantic voyage partly powered by colloidal fuel containing 40% coal. Advantages over oil included cost and energy density. Colloidal fuel is denser than water, which allows it to be stored under water.[2]

References
  1. Corporation, Bonnier (1919-07-01). Popular Science. Bonnier Corporation.
  2. "Colloidal Fuel". Nature. 130 (3272): 86–86. 16 July 1932. doi:10.1038/130086b0.


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