Gao Ming, Wang Linlin, Chen Xiaopeng, Wei Xiaojie, Liang Jiezhen, Li Luji
School of Chemistry and Chemical Engineering, Guangxi Key Laboratory of Petrochemical Resources Processing and Process Intensification Technology, Guangxi University, Nanning 53004, P. R. China.
ACS Omega. 2021 Mar 31;6(14):9857-9867. doi: 10.1021/acsomega.1c00554. eCollection 2021 Apr 13.
The Joule-Thomson effect is a key chemical thermodynamic property that is encountered in several industrial applications for CO capture and storage (CCS). An apparatus was designed and built for determining the Joule-Thomson effect. The accuracy of the device was verified by comparing the experimental data with the literature on nitrogen and carbon dioxide. New Joule-Thomson coefficient (μ) measurements for three binary mixtures of (CO + N) with molar compositions = (0.05, 0.10, 0.50) were performed in the temperature range between 298.15 and 423.15 K and at pressures up to 14 MPa. Three equations of state (GERG-2008 equation, AGA8-92DC, and the Peng-Robinson) were used to calculate the μ compared with the corresponding experimental data. All of the equations studied here except PR have shown good prediction of μ for (CO + N) mixtures. The relative deviations with respect to experimental data for all (CO + N) mixtures from the GERG-2008 were within the ±2.5% band, and the AGA8-DC92 EoSs were within ±3%. The Joule-Thomson inversion curve (JTIC) has also been modeled by the aforementioned EoSs, and a comparison was made between the calculated JTICs and the available literature data. The GERG-2008 and AGA8-92DC EoSs show good agreement in predicting the JTIC for pure CO and N. The PR equation only matches well with the JTIC for pure N, while it gives a poor prediction for pure CO. For the (CO + N) mixtures, the three equations all give similar results throughout the full span of JTICs. The temperature and pressure of the transportation and compression conditions in CCS are far lower than the corresponding predicted and for (CO + N) mixtures.
焦耳-汤姆逊效应是一种关键的化学热力学性质，在二氧化碳捕集与封存（CCS）的多个工业应用中都会遇到。设计并制造了一种用于测定焦耳-汤姆逊效应的装置。通过将实验数据与关于氮气和二氧化碳的文献进行比较，验证了该装置的准确性。对摩尔组成 =（0.05、0.10、0.50）的（CO + N）三种二元混合物在298.15至423.15 K的温度范围内以及高达14 MPa的压力下进行了新的焦耳-汤姆逊系数（μ）测量。使用三种状态方程（GERG-2008方程、AGA8-92DC和彭-罗宾逊方程）来计算μ，并与相应的实验数据进行比较。除PR方程外，这里研究的所有方程对（CO + N）混合物的μ都显示出良好的预测能力。GERG-2008方程对所有（CO + N）混合物的实验数据的相对偏差在±2.5%范围内，AGA8-DC92状态方程在±3%范围内。焦耳-汤姆逊反转曲线（JTIC）也已通过上述状态方程进行建模，并将计算得到的JTIC与现有的文献数据进行了比较。GERG-2008和AGA8-92DC状态方程在预测纯CO和N的JTIC方面显示出良好的一致性。PR方程仅与纯N的JTIC匹配良好，而对纯CO的预测较差。对于（CO + N）混合物，这三个方程在JTIC的整个范围内都给出了相似的结果。CCS中运输和压缩条件下的温度和压力远低于（CO + N）混合物相应的预测 和 。
