| 摘要 |
<p>PROBLEM TO BE SOLVED: To obtain an absorbent for carbonic acid gas for a closed space which can be used at room temperature in an atmosphere of low concentration carbonic acid gas, which can be regenerated and which has high absorptivity for carbonic acid gas. SOLUTION: As for the absorbent 3 for carbonic acid gas to absorb and remove carbonic acid gas of low concentration discharged from a living body 1 in a closed space 2, a multiple oxide containing lithium such as lithium silicate is used. The multiple oxide efficiently reacts with carbonic acid gas at room temperature in a gas atmosphere of low concentration, and the reaction is reversible. Hence, the absorbent can be regenerated by the heat treatment at a rather low temperature as about 700 deg.C.</p> |
