Publications & Presentations

Nuckols, M. (Dept. of Mech. Eng. & Mater. Sci., Duke Univ., Durham, NC, USA) Kolaczkowski, S. (Univ. Bath); Awdry, S. (Univ. Bath); Le, C. (Univ. Bath); Smith, T.; Thomas, D.
An initial assessment for the use of seawater as a method to remove metabolically-produced carbon dioxide from a submersible atmosphere
Presented at conference in Waikoloa, HI, 19-22 Sept. 2011

Publication: OCEANS 2011, Page(s) 1 - 8, Print ISBN: 978-1-4577-1427-6, INSPEC Accession Number: 12458912

Traditional CO2 absorption methods that are integrated into underwater life support systems use alkali metal hydroxide chemical beds-mostly calcium hydroxide-which have been shown to have poor absorption efficiencies at cold temperatures, and must be replaced at considerable trouble and expense on a frequent basis. With chemical utilizations as low as 20% in water temperatures of 2 C, these hydroxides do not lend themselves to applications requiring extended durations due to the inability to carry sufficient quantities of these expendables. Experimental evidence suggests that seawater, a readily accessible medium during submersible operations, could be a highly efficient scrubbing medium to remove metabolically-produced carbon dioxide, particularly in cold water missions. This paper describes a feasibility assessment for using seawater to remove metabolically-produced carbon dioxide from a submersible atmosphere and proposes a multi-path scrubber design for use as an underwater life support system.

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