Environmental Control in Manned Spacecraft Atmosphere

概要

論文の詳細を見る
A new type of carbon dioxide (CO2) removal substance so called solid amine has good features to keep a closed cabin atmosphere clean in manned spacecraft. It can adsorb rare CO2 gas repeatedly by use of regeneration process with small amounts of thermal energy and/ or depressurizing. It is also available to adsorb water composition simultaneously. An ordinary CO2 removal agent, lithium hydroxide (LiOH), has larger amounts of CO2 removal capacity than that of solid amine; however, decomposition process to purge reacted CO2 requires high temperature and large amounts of energy, so that loading weight will become larger in proportion as duration time and crew number. Another well-known CO2 removal agent, zeolite molecular sieves, needs a desiccant process to efficiently adsorb CO2 gas. Solid amine has unique characteristics in comparison with lithium hydroxide and zeolite. Basic characteristics of solid amine are described in another paper (12) concerning adsorption equilibrium, breakthrough data in a fixed bed system, and diffusion mechanism under N2 gas atmosphere condition. This paper deals with moisture adsorption on solid amine, effects of humidity to CO2 removal capacity, and mechanism of bicomponent adsorption of CO2 and moisture in air at room temperature.
生態工学会の論文