On the evaluation of the performance of the hydrophobic Pt catalyst packed in the trickle-bed test column, the conventionally defined (
Kya) and the newly defined (
K f )
G are compared with each other as a measure of the overall D-transfer coefficient. The value of (
Kya) varies in a wide range in accordance with the length of the test column. On the other hand (
K f )G t=l has a finite value in the test column longer than about 0.5 m. By considering the values of
k g and
kl which are the constituents of (
K f )
G , it is possible to improve the hydrophobic Pt catalyst trickle bed and to design the H
2/H
2O-isotopic exchange trickle-bed column packed with this catalyst.
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