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題 名 | An Examination on the Adsorption Kinetics of 1-Decanol at Air-Water Interface=藉理論模擬來檢驗正癸醇在空氣-水界面之吸附動力學 |
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作 者 | 徐敬添; 林析右; | 書刊名 | Journal of the Chinese Institute of Chemical Engineers |
卷 期 | 29:2 1998.03[民87.03] |
頁 次 | 頁129-137 |
分類號 | 460.025 |
關鍵詞 | 正癸醇; 空氣; 水界面; 吸附動力學; Adsorption kinetics; Diffusion; Surface tension; Decanol; |
語 文 | 英文(English) |
中文摘要 | 本文探討正癸醇在水溶液中與空氣-水界面間之質傳機構。本研究使用平衡張力 數據、擴散係數值和一般化的吸附模式,藉由理論模擬來檢驗Lin等人(1995)由實驗測得 之正癸醇的吸附動力學和吸/脫附動力常數值。本模擬獲得下列結果:(1)因為界劑分子間 凡得瓦力之影響,而存在著下迷之可能性;正癸醇分子由水溶廠中吸附至一瞬間生成之氣 -液界面為一擴散控制程序,而由一瞬間被壓縮之液氣-界面脫附至水中時為一混合控制程 序;(2)Lin等人由實驗所獲得之吸/脫常數值,確實落於上迷之區域內,故其測量結果應 屬合理。 |
英文摘要 | The adsorption kinetics of 1-decanol was investigated by measuring the equilibrium and dynamic surface tension profiles by Lin et al. (1995).From the relaxation of surface tension for the adsorption onto a clean air-water interface and the desorption out of a compressed interface, the diffusivity and the kinetic rate constants of 1-decanol were evaluated. In this work, the adsorption kinetics for 1-decanol is examined theoretically. Using the equilibrium data of surface tension, diffusivity and the generalized Frumkin adsorption model, the relaxations of surface tension of the adsorption and desorption processes are simulated. Novel regions, where the adsorption onto a clean interface is of diffusion-control and the desorption out of a compressed interface is mixed-controlled, at different compression ratios are identified for 1-decanol. This is resulted from the presence of cohesive intermolecular forces between the decanol molecules adsorbed at the air-water interface. The data of kinetic rate constants evaluated by Lin et al. Are also compared with the novel regions, Decanol is verified theoretically that the adsorption onto a clean interface is diffusion-controlled and the desorption out of a compressed interface is diffusive-kinetic control. ve-kinetic control. |
本系統中英文摘要資訊取自各篇刊載內容。