摘要
选取五个比较常用的饱和蒸气压方程,利用二甲醚的两种文献数据分别拟合了各方程系数,五个关联方程与文献值的最大平均偏差为0.0793%,最小平均偏差为0.0205%,适用温度范围为文献蒸气压数据测试范围,关联方程式难于外推。选取了六种对应状态估算方法和一种对应态基团法用于估算二甲醚的饱和蒸气压,与两种文献值相比,七种估算方程的最大平均偏差为4.131%,最小平均偏差为0.190%,估算方程的适用温度范围广,预测性能强。
Five common saturated vapor pressure equations are used in this paper and the fitting coefficients of each equation are given by two kinds of literature data about DME. The greatest average deviation between five correlation equations and literature data is 0.0793%. The least deviation is 0.205%. It is difficult to be extrapolated for correlation equations and its application temperature is within the test range of literature data about vapor pressure of DME. The saturated vapor pressure of DME have estimated by six estimating methods of corresponding states and one latest corresponding state group contribution(CSGC). Compared with two kinds of literature data,the greatest deviation of seven estimating methods is 4.131% and the least deviation is 0.19%. The estimating equations have wide rang of application temperature and strong ability of forecast.
出处
《石油与天然气化工》
CAS
CSCD
北大核心
2005年第3期152-155,共4页
Chemical engineering of oil & gas
基金
湛江市科技攻关计划项目(编号:2002046)
