The kinematic viscosity values of the saturated liquid dimethoxy methane are reported over the temperature range from 248.467 to 353.154 K along the saturation line made with a calibrated Ubbelohde-type capillary visc...The kinematic viscosity values of the saturated liquid dimethoxy methane are reported over the temperature range from 248.467 to 353.154 K along the saturation line made with a calibrated Ubbelohde-type capillary viscometer.The total experimental uncertainty is less than 0.71%.In addition, the results were correlated as a function of temperature for the kinematic viscosity equation of saturated liquid. The absolute average deviation and the maximum deviation of the experimental results from the correlated equation are 0.35% and 1.45%, respectively.展开更多
CO_2在压裂过程中黏度较小,导致携砂能力较弱,压裂效果不明显。为改善CO_2的黏度,增强压裂效果,基于相似相溶理论和分子作用力理论,制备了具有一定分子质量可显著增稠的硅氧烷聚合物,并以甲苯作为助溶剂,使用毛细管压差计,对不同压力和...CO_2在压裂过程中黏度较小,导致携砂能力较弱,压裂效果不明显。为改善CO_2的黏度,增强压裂效果,基于相似相溶理论和分子作用力理论,制备了具有一定分子质量可显著增稠的硅氧烷聚合物,并以甲苯作为助溶剂,使用毛细管压差计,对不同压力和温度下不同质量浓度的增稠剂进行增稠性能测试,分析测试效果。结果表明:分子中加入恒定比例的疏CO_2基团,其溶解性能不变,但增稠效果显著增大;相同质量浓度的增稠剂,相同压力下随温度的升高,其增稠效果显著降低,相同温度下随压力的升高,其增稠效果升高不明显;文中测试最大黏度为1.2 m Pa·s(增稠30倍)。另外,较小的分子质量有利于聚合物在CO_2中的溶解和增稠,硅氧烷类增稠剂在压裂过程中可以避免地下水和地表水的污染。合成的聚合物能够明显提高液态CO_2的黏度,测试结果表明,硅氧烷作为CO_2增稠剂时的合成规则及其使用条件,可以为压裂用超临界CO_2增稠剂的设计提供参考。展开更多
文摘The kinematic viscosity values of the saturated liquid dimethoxy methane are reported over the temperature range from 248.467 to 353.154 K along the saturation line made with a calibrated Ubbelohde-type capillary viscometer.The total experimental uncertainty is less than 0.71%.In addition, the results were correlated as a function of temperature for the kinematic viscosity equation of saturated liquid. The absolute average deviation and the maximum deviation of the experimental results from the correlated equation are 0.35% and 1.45%, respectively.
文摘CO_2在压裂过程中黏度较小,导致携砂能力较弱,压裂效果不明显。为改善CO_2的黏度,增强压裂效果,基于相似相溶理论和分子作用力理论,制备了具有一定分子质量可显著增稠的硅氧烷聚合物,并以甲苯作为助溶剂,使用毛细管压差计,对不同压力和温度下不同质量浓度的增稠剂进行增稠性能测试,分析测试效果。结果表明:分子中加入恒定比例的疏CO_2基团,其溶解性能不变,但增稠效果显著增大;相同质量浓度的增稠剂,相同压力下随温度的升高,其增稠效果显著降低,相同温度下随压力的升高,其增稠效果升高不明显;文中测试最大黏度为1.2 m Pa·s(增稠30倍)。另外,较小的分子质量有利于聚合物在CO_2中的溶解和增稠,硅氧烷类增稠剂在压裂过程中可以避免地下水和地表水的污染。合成的聚合物能够明显提高液态CO_2的黏度,测试结果表明,硅氧烷作为CO_2增稠剂时的合成规则及其使用条件,可以为压裂用超临界CO_2增稠剂的设计提供参考。
