頁籤選單縮合
題名 | Further Studies in the Elucidation of the Abnormal Solubilities of the Lower Molecular Weight Gases in Aqueous Solutions Near Hydrate Formation Temperatures=低分子量氣體在水合物形成溫度附近不正常溶解度現象之深入探討 |
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作者姓名(外文) | Song,Kyoo Y.; Feneyrou,Guillaume; Fleyfel,Fouad; Martin,Ray; Lievois,John; Kobayashi,Riki; | 書刊名 | Journal of the Chinese Institute of Chemical Engineers |
卷期 | 27:4 1996.07[民85.07] |
頁次 | 頁329-335 |
分類號 | 341.393 |
關鍵詞 | 低分子量氣體; 水合物形成溫度; 不正常溶解度現象; Hydrate formation; Isbaric solubility; Methane; Ethane; Water; |
語文 | 英文(English) |
英文摘要 | Isobaric solubilities of pure methane and ethane gases in liquid water have been measured at different conditions including hydrate formation points using a ramping method in which measurements are made untraditionally through the entire and continuous hydrate formation/decomposition cycle. The work was conducted for methane at 3.45MPa (500 psia) and temperatures ranging from 17.0 to 0.0°C (290.2 to 273,2K), and for ethane at 0.66 MPa (95 psia) and a temperature range of 17.0 to 0.0°C (290.2 to 273,2K). The isobaric solubilities obtained show a significant divergence from (normal) Henry's law solubilities as the temperature is lowered. The increase in the solubility is presumably the result of the unset of a sorption process that traps the gas molecules in the water structures. Several sub-processes were observed as the hydrate formation was taking place: (1) the dissolution of the gas in the liquid water, or interstitial solubility, (2) the onset of the sorption sub-process and build-up of the hydrate precursors, (3) the catastrophic formation and the existence of the solid phase with its slushy characteristics, and (4) the solidification of the hydrates, therefore causing the total plugging of the experimental cell. |
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