Removal of CO2 from a submersible atmosphere by scrubbing with water: Experiments in a single column

Stanislaw Kolaczkowski, Serpil Awdry, Chien Le, M L Nuckols, T. Smith, D. Thomas

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)
174 Downloads (Pure)

Abstract

In order to explore methods of removing CO2 from submersible habitats with sea water, gas scrubbing experiments (using tap water, and tap water with 3.5 wt% sea salt) were performed in a 108 mm i.d. pilot-scale column, investigating the removal efficiency of CO2 (e.g. at 2 vol%) from a gaseous stream. The performance of this column fitted with 5 spray nozzles was compared with a column packed with 1/8th in. Dixon rings (packing depth = 1480 mm). More detailed experiments were then performed in the column packed with Dixon rings at: liquid flows from 4 to 8 dm3 min−1; gas flows 18 and 36 N dm3 min−1, column pressures = 1 and 4 bar(g); column temperatures approximately 5 and 17 °C. In general, CO2 removal increased as column operating pressure was increased, or fluid temperature was decreased. When approaching low gas outlet CO2 levels at the top of the column (e.g. 0.1 vol%), the concentration of carbonate species in the tap water (fed into the column) restricted further improvements in the performance of the column.

In experiments in a short column with Dixon rings (packing depth = 180 mm), using fresh water in each column, the performance of a multi-column eight chamber compact scrubber was simulated, and shown to be significantly better than a single tall column.
Original languageEnglish
Pages (from-to)157 - 169
Number of pages13
JournalChemical Engineering Research & Design
Volume100
Early online date11 May 2015
DOIs
Publication statusPublished - Aug 2015

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