Abstract
Vaporization properties of sulfur compounds are of interest in connection with the engineering design of processes for the production of clean sulfur-free fuels. In this work we determined the K-values and activity coefficients of a number of these sulfur-containing compounds: ethyl mercaptan (ethanethiol), n-propyl mercaptan (I-propanethiol), n-butyl mercaptan (I-butanethiol), sec-butyl mercaptan (2-butanethiol), isobutyl mercaptan (2-methyl-l-propanethiol), dimethyl SUIfide (2-thiapropane), methyl ethyl sulfide (2-thiabutane), diethyl sulfide (3-thiapentane), and dimethyl disulfide (2,3-dithiabutane). Gas liquid partition chromatography (GLPC) was employed with liquid n-hexadecane supported on crushed firebrick as the stationary phase and helium as the carrier gas. GLPC is an efficient experimental technique for determining K-values of a number of solutes in a given solvent. The technique has been thoroughly described by a number of authors ( 4 , 7, 8) and is particularly well suited for the odorous compounds considered here. Stalkup and Kobayashi ( 7 ) presented the following equation for the determination of K-values from GLPC retention volume data:
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