碳酸二甲酯液相音速测量与理论估算

Speed of sound measurement and prediction of dimethyl carbonate

中文关键词: 碳酸二甲酯  音速  布里渊散射  Wada模型

英文关键词: Dimethyl carbonate  Speed of sound  Brillouin scattering  Wada model

中文摘要:

      生物燃料作为化石燃料的替代物越来越受到人们的重视，脂肪酸甲酯(FAEEs)是生物燃料中的重要组成成分。本文利用布里渊散射法，分别沿0.1、1、3、5、7和10 MPa六条等压线，在293.15 ~ 373.15 K的温度范围内，测量了碳酸二甲酯的液相音速。为方便工程应用，根据实验数据给出了碳酸二甲酯音速与温度和压力的关联式。在本文的p – T热力学区域内，实验值与关联计算值之间的平均绝对误差为0.20%。最后，结合碳酸二甲酯音速实验值和密度文献值，给出了碳酸根 (-CO3)、甲氧基(CH3O-)基团的Wada常数基团贡献值，分别为0.72769±103和0.66851±103。

英文摘要:

      Biofuels as an alternative to fossil fuels are getting more and more attention, Fatty acid methyl ester (FAEEs) is an important component in biofuels. In this paper, the Speed of Sound of dimethyl carbonate was measured by Brillouin scattering method along six isobars of 0.1、1、3、5、7 and 10 MPa in the temperature range of 293.15 ~ 373.15 K. In addition, in order to facilitate the engineering application, the correlation between the Speed of sound and temperature and pressure is given according to the experimental data. In the p-T thermodynamical region of the experiment, the mean absolute deviation between the experimental and associated calculations was 0.20%. Finally, the group contribution values of carbonate (-CO3) group and methoxy (CH3O-) group were given in combination with the experimental values of dimethyl carbonate and the experimental values of density, which are 0.72769±103 and 0.66851±103, respectively.