کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5783438 | 1637949 | 2017 | 16 صفحه PDF | دانلود رایگان |
In this study, the solubility of acetylene (or ethyne, C2H2) and ethylene (or ethene, C2H4) in liquid methane (CH4) and ethane (C2H6) has been experimentally determined at Titan surface temperature (90Â K) and pressure (1.5Â bars). As predicted by theoretical models, the solubilities of acetylene and ethylene are very large at Titan temperature and these species are most likely to be abundantly present in the lakes and as evaporites on the shores or dry lake beds. Our results indicate the solubility of 4.9Â ÃÂ 10â2Â mole fraction for acetylene in methane and 48Â ÃÂ 10â2Â mole fraction in ethane; for ethylene, 5.6Â ÃÂ 10â1Â mole fraction in methane and 4.8Â ÃÂ 10â1Â mole fraction in ethane. Assuming the mole fractions from atmospheric models in the lower stratosphere and equilibrium with the surface, we determined that the lakes on Titan that cover â¼400,000Â km2 are not saturated. The liquid lakes on Titan act as an important reservoir for both acetylene and ethylene. Assuming difference of methane and ethane content in the lakes at different latitudes, the difference in solubility in liquid methane and ethane, solutes in lakes may change with the temporal evolution (such as; evaporation and condensation) over seasons and geological time scales.
Journal: Geochimica et Cosmochimica Acta - Volume 208, 1 July 2017, Pages 86-101