The low-pressure phase diagram of sulfur
The low-pressure phase diagram of sulfur
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DOI：
10.1016/j.jct.2010.07.007
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发表时间：
2011-02-01
影响因子：
2.6
通讯作者：
Lobo, L. Q.
中科院分区：
文献类型：
--
作者：
Ferreira, A. G. M.;Lobo, L. Q.
硫的（p，T）相图的实验值已通过常用的经验公式进行了评估。这种处理显示出不确定性，即那些导致低压三相点坐标的显著不确定性。通过对前人建立和发展的Clapeyron方程的精确积分，提供了一种尝试和寻找可靠的相平衡曲线方程的替代方法。因此，不需要对（p，T）实验数据进行拟合。根据该方法，求出了所有硫低压平衡线的方程，同时提供了各相之间的相变曲线与温度的函数关系，以及低压三相点坐标的可靠值。所有这些计算的细节和相应的结果是本文件的对象。根据这些线的计算结果，重建了硫的（p，T）低压相图。(C)2010爱思唯尔有限公司保留所有权利。
The experimental values of the (p, T) phase diagram of sulfur have been assessed through empirical equations commonly used. This treatment shows insufficiencies, namely those leading to significant uncertainties in the coordinates of the low-pressure triple points. An alternative way to try and find reliable equations for the phase equilibrium curves is provided by the exact integration of Clapeyron equation established and developed in a previous work. No fitting to (p, T) experimental data is then necessary. According to this method equations have been found to all the sulfur low-pressure equilibrium lines, and at the same time providing the enthalpies of transition between the phases as functions of temperature, and reliable values for the coordinates of the low-pressure triple points. The details of all these calculations and of the corresponding results are the object of the present paper. The (p, T) low-pressure phase diagram of sulfur is reconstructed on the basis of the results of the calculations carried out following these lines. (C) 2010 Elsevier Ltd. All rights reserved.