Abstract
A knowledge of the equilibrium deuterium distribution between water and fluoroform is useful for design of the redeuteration stage of a heavy water production process based on IR laser-activated decomposition of CF/sub 3/D in excess CF/sub 3/H. The first measured fractionation factor data are presented for the temperature range 70-130 /sup 0/C. The deuterium is favored in the fluoroform (..cap alpha.. = 1.139 at 130 /sup 0/C, 1.215 at 70 /sup 0/C, and 1.287 at 25 /sup 0/C (extrapolated)). These values are approximately 10-20% higher than various reported theoretical estimates calculated by using isotopic reduced partition function ratios based on molecular vibrational frequencies (with harmonic oscillator approximation). ..delta..H/sup 0/ = -1.23 kJ/mol was calculated from the temperature dependence of ln ..cap alpha...
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