Abstract New experimental dissociation data for CH4, C2H6, and CO2 hydrates obtained by high-pressure microcalorimetry (HP-μDSC) up to 100 MPa are presented. Deviations of onset, peak, and endset temperatures from predictions and their representativeness as equilibrium values are evaluated. For these systems, the onset temperatures provided good reproducibility and more accurate results than peak and endset temperatures, when compared to literature data. Predictions from CSMGem and Multiflash software packages are compared to the experimental results. Dynamic effects on gas hydrates formation are also evaluated by varying the water-sample size and the cooling-heating rate. Enthalpies of dissociation are determined by applying the Clapeyron equation, and new approaches are applied for the calculation of the hydrate volume and the hydration number estimation. The enthalpy of dissociation at conditions above the upper quadruple point is obtained for ethane and carbon dioxide hydrates for the first time.

中文翻译：

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通过高压微量热法在高达 100 MPa 的压力下实现甲烷、乙烷和二氧化碳水合物的相平衡：实验数据、分析和建模

摘要 本文提供了通过高达 100 MPa 的高压微量热法 (HP-μDSC) 获得的 CH4、C2H6 和 CO2 水合物的新实验解离数据。评估起始温度、峰值温度和终止温度与预测的偏差及其作为平衡值的代表性。对于这些系统，与文献数据相比，起始温度提供了良好的重现性和比峰值和终止温度更准确的结果。将来自 CSMGem 和 Multiflash 软件包的预测与实验结果进行比较。还通过改变水样大小和冷却-加热速率来评估对天然气水合物形成的动态影响。解离焓通过应用克拉珀龙方程确定，新的方法被应用于水合物体积的计算和水合数的估计。首次获得了乙烷和二氧化碳水合物在上四点以上条件下的解离焓。