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CISDOC database

Document ID (ISN)36603
CIS number 81-2022
ISSN - Serial title 0095-6562 - Aviation, Space, and Environmental Medicine
Year 1981
Convention or series no.
Author(s) Wang T.C.
Title Residence time and carbon dioxide scrubbing efficiency in life support systems
Bibliographic information Feb. 1981, Vol.52, No.2, p.104-108. Illus. 14 ref.
Abstract The effect of the residence time, the length of time the gas is exposed to the absorbent material, on the absorption efficiency and capacity of 5 different commercial granular absorbents for carbon dioxide (CO2) was evaluated under controlled flow and temperature conditions. Anhydrous and partially hydrated lithium hydroxide (LiOH) had the highest CO2 absorption capacity when residence time was about 0.8s and absorption capacity increased with increasing porosity. At 0.4s residence time the absorption capacity of partially hydrated LiOH was 13 times greater than that of anhydrous LiOH. The CO2 absorption capacity of both Sodasorb and Baralyme increased with increasing residence time but was greatly reduced for residence times <1.0s.
Descriptors (primary) absorbents; sorbent filters; self-contained breathing apparatus; carbon dioxide
Descriptors (secondary) sodium hydroxide; barium hydroxide; calcium hydroxide; gas absorption; potassium hydroxide; lithium hydride
Document type D - Periodical articles
Subject(s) Personal protection
Broad subject area(s)
Browse category(ies) Respiratory protection
Carbon dioxide
Inorganic substances