アンモニア蒸気吸収過程における物質拡散 : 第3報, NaSCNおよびLiSMのアンモニア溶液における気液平衡線図と物質拡散

概要

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In this study precise measurements of P-T-C curves for the NaSCN-NH_3 and LiSCN-NH_3 solutions were made, and the characteristics of static ammonia vapor absorption into those solutions were clarified. As a result it was observed that the NH_3/LiSCN system shows low vapor pressure, so that the characteristics of vapor absorption are superior, compared with the NH_3/NaSCN system. On the other hand, the mass diffusion coefficient in the process of ammonia vapor absorption into a NaSCN-NH_3 solution is much higher than in the case of LiSCN-NH_3. Furthermore, the experimentally observed behavior is explained in terms of molecular theory, based on Li^+ and Na^+ ionic behavior. This study proved highly useful for developing chemical energy systems for temperature boosting and also ammonia absorption heat pumps applicable in a wide temperature range.
1993-01-25