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首页> 外文期刊>Journal of the Chinese Institute of Chemical Engineers >FURTHER STUDIES IN THE ELUCIDATION OF THE ABNORMAL SOLUBILITIES OF THE LOWER MOLECULAR WEIGHT GASES IN AQUEOUS SOLUTIONS NEAR HYDRATE FORMATION TEMPERATURES
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FURTHER STUDIES IN THE ELUCIDATION OF THE ABNORMAL SOLUBILITIES OF THE LOWER MOLECULAR WEIGHT GASES IN AQUEOUS SOLUTIONS NEAR HYDRATE FORMATION TEMPERATURES

机译：在水合物形成温度附近的水溶液中，较低分子量的气体的异常溶解度的消除的进一步研究

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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 3.45 MPa (500 psia) and temperatures ranging from 17.0 to 0.0 degrees C (290.2 to 273.2 K), and for ethane at 0.66 MPa (95 psia) and a temperature range of 17.0 to 0.0 degrees C (290.2 to 273.2 K). 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 onset 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. [References: 27]
机译：已使用缓变方法在包括水合物形成点在内的不同条件下测量了纯甲烷和乙烷气体在液态水中的等压溶解度，该方法在整个和连续的水合物形成/分解循环中非常规地进行测量。在3.45 MPa（500 psia）和17.0至0.0摄氏度（290.2至273.2 K）的温度范围内对甲烷进行工作，在0.66 MPa（95 psia）的温度在17.0至0.0摄氏度（ 290.2至273.2 K）。随着温度降低，所获得的等压溶解度与（正常）亨利定律溶解度存在显着差异。溶解度的增加大概是吸附过程开始的结果，该过程将气体分子捕获在水结构中。随着水合物的形成，观察到了几个子过程：（1）气体在液态水中的溶解或间隙溶解性;（2）吸附子过程的开始和水合物前体的堆积，（3）具有泥泞特性的灾难性形成和固相的存在，以及（4）水合物的固化，因此导致实验细胞完全堵塞。 [参考：27]

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