화학공학소재연구정보센터
Chemical Engineering Research & Design, Vol.100, 157-169, 2015
Y Removal of CO2 from a submersible atmosphere by scrubbing with water-Experiments in a single column
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 dm(3) min(-1); gas flows 18 and 36 N dm(3) min(-1), column pressures =1 and 4bar(g); column temperatures approximately 5 and 17 degrees 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. (C) 2015 The Institution of Chemical Engineers. Published by Elsevier B.V. All rights reserved.