水溶液中への水素ガスの溶解速度
水溶液からの金属のガス還元に関する研究 (第1報)
1977 年 93 巻 1078 号 p. 969-974
詳細
1977 年 93 巻 1078 号 p. 969-974
The dissolution of hydrogen gas in aqueous solutions was studied in connection with hydrogen reduction of metals from solutions. Dissolution rates as well as solubilities of hydrogen gas in various aqueous solutions were determined by a pressure transducer technique.The main results obtained are as follows:
(1) Initial dissolution rates of hydrogen gas in pure water increase linearly with the increase in hydrogen pressure.
(2) Hydrogen dissolution in aqueous solutions is accelerated by strong agitaion and high temperature, obeying an empirical formula, R=c exp (αω), in which R is the dissolution rate. c is the function of temperature.α is a constant and ω is the stirring speed.
(3) Activation energy for hydrogen dissolution in pure water was apparently found to be around 3 kcal/mol, and this suggests that gaseous hydrogen dissolves at a rate which is diffusion-controlled in water phase.
(4) The dissolution rates of hydrogen gas in aqueous solutions depend primarily on its solubilities which is decreasingly affected by the addition of solutes.
