Henry's law constant for hydrogen in natural water and deuterium in heavy water

Abstract

The results of measurements of the Henry's law constant near infinite dilution are reported for solutions of H₂ in H₂O and D₂ in D₂O at high temperatures (170∽300°C). The experimental procedure involved the use of a palladium/hydrogen (or deuterium) electrical resistance sensor. Values of K_H^∞ for H₂–H₂O solutions agree closely with published data. Values of K_H^∞ for D₂–D₂O solutions are lower than those for H₂–H₂O solutions. With increasing concentrations of H₂ in H₂O and D₂ in D₂O the Henry's law coefficients decrease. This is attributed to non-ideality in the gas phase.