FEASIBILITY INVESTIGATIONS OF ELECTROSTATIC PRECIPITATION FOR THE REMOVAL OF GASEOUS TRACE CONTAMINANTS FROM MANNED CABIN ATMOSPHERES.
Final rept. 1 Nov 66-31 May 68,
STANFORD RESEARCH INST SOUTH PASADENA CALIF SOUTHERN CALIFORNIA LABS
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This research is part of a program to study the feasibility of using a modified mode of electrostatic precipitation to remove polar gaseous trace contaminants from manned space-cabin atmospheres. A cell was developed for the removal of polar contaminant molecules from a 100 mlmin air inflow at part-per-million concentration levels of the contaminant. The operating principle of this cell is as follows Positive lithium ions are thermionically generated and injected into the contaminated air stream. Ionic reaction products are collected at a set of porous metal collection electrodes. These electrodes are air-eluted. They are situated at the bottoms of slot-shaped wells to minimize escape of the collected contaminant molecules through diffusion. A measured efficiency of 20 for removal of acetone at a concentration of 1 ppm in dry air was finally achieved with this cell after considerable development work on the apparatus. This result is tentative pending further confirmatory experiments. Author
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