| 摘要 |
<p>PROBLEM TO BE SOLVED: To enhance adsorptive performance by a grass peat itself, especially the adsorptive and removing performance of carbon monoxide and carbon dioxide by thermally treating the grass peat. SOLUTION: A commercially supplied grass peat is packed in a treatment chamber 3 and the interior of the treatment chamber 3 is vacuumized to a specified vacuum pressure level using a vacuum pump. Then the interior of the treatment chamber 3 is turned to a plasmatic state by emitting a microwave and, after the lapse of a specified time, the emission of the microwave is stopped to remove the grass peat. This plasma is a low-temperature plasma using an electromagnetic wave such as a radio wave or a microwave under a vacuum pressure, and contains a charge particle such as an excited molecule, atom, ion or electron. As a whole, the plasma is a group of electrically almost neutral particles. The BET specific surface of the grass peat varies depending upon chemical treatment conditions such as an alkaline treatment before and after a vacuum heating treatment or a plasma treatment, or plasma treatment conditions, compared to the BET specific surface prior to the plasma treatment. When the wavelength and the output of the electromagnetic wave are constant, it is possible to increase the BET specific surface by controlling a treatment time. Consequently, the saturated adsorption of carbon dioxide can be increased.</p> |
