活性炭の吸脱着特性に関する試験研究(2)

Research on adsorption and desorption properties of activated charcoals (2)

丸山 忠司*; 長友 仁郎*

Maruyama, Tadashi*; Nagatomo, Jinro*

市販されている活性炭を5種類選定し、これら活性炭の吸脱着破過特性を、既知の活性炭(クラレコール)の破過特性と比較を行うために、小型活性炭吸着床試験装置および質量分析計を用いて試験を行った。また、低温状態に冷却した活性炭吸着床にXe, Krを含んだ試料ガスを通気させ活性炭に深冷吸着させたあと、吸着床を加熱し脱着したガスの濃度を質量分析計で測定し、低温吸着時の希ガス特性の確認を行った。これら試験で取得したデータをもとに、各種活性炭の動的吸着平衡係数を算出し、活性炭の粒度、比表面積、充填密度等のデータと併せて評価・検討を行い活性炭の希ガス吸脱着特性の比較を行った。

The results of measurement showed that anomalous breakthrough curves were observed at -180C which is effect of condensation of noble gas. However, the amomalous breakthrough curves was not observed at -170C. It was shown that the activated good performances. The effect of materials propertied on the absorption and the desorption properties is summarized as follows: The longer breakthrough time and the steeper break through curves were obtained as the grain size became smaller and the specific surface area gets larger. Further studies are needed to elucidate effect on enrichment of experimental conditions by varying such as the heating rate,sweep gas velocity,and the onset tempertuer of heating