| 摘要 |
<p>PROBLEM TO BE SOLVED: To produce an acidic gas absorbent to be reproduced several times to scores of times by impregnating a honeycomb-shaped material formed by active carbon, calcium hydroxide and gypsum with calcium hydroxide solution. SOLUTION: A bonding force is decreased by the variation of structure caused by the reaction of gypsum as an aggregate with potassium carbonate in an acidic gas absorbing material heretofore available. Also, for instance, calcium hydroxide is turned into calcium nitrite through the reaction with nitrogen dioxide and becomes water-soluble and its shape is broken. To avoid the above trouble, potassium carbonate is removed and the required shape is formed, and then impregnation with potassium hydroxide water solution is carried out to control the change of gypsum, and an acidic gas absorption material to be reproduced several times can be manufactured without lowering the absorption performance. Also the number of the reproductions can be improved up to scores of times by adding an inorganic bonding material producing no chemical change.</p> |
