应用Chrastil缔合模型计算元素硫在酸性气体中的溶解度  

Calculation of Solubility of Elemental Sulfur in Acid Gas Mixture by Chrastil's Association Model

作　　者：关小旭[1] 李朋 张砚[3] 乔玖春[4] 李岩 刘炳森 GUAN Xiaoxu LI Peng ZHANG Yan QIAO Jiuchun LI Yan LIU Bingsen(College of Energy Resources, Chengdu University of Technology, Chengdu 610059, Sichuan, China Faculty of Petroleum Engineering, China University of Petroleum （ East China） , Qingdao 266580, Shandong, China Northwest Sichuan Mining District, PetroChina Southwest Oil and Gas Field Company, Jiangyou 621700, Sichuan, China The Fourth Oil Production Plant, Changqing Oilfield Company, Jingbian 718500, Shaanxi, China The South Sulige Operating Branch, Changqing Oilfield Company, Xi＇an 710018, Shaanxi, China)

机构地区：[1]成都理工大学能源学院,四川成都610059 [2]中国石油大学(华东)石油工程学院,山东青岛266580 [3]中国石油西南油气田分公司川西北气矿,四川江油621700 [4]中国石油长庆油田第四采油厂,陕西靖边718500 [5]中国石油长庆油田分公司苏里格南作业分公司,陕西西安710018

出　　处：《西安石油大学学报（自然科学版）》2017年第1期101-106,118,共7页Journal of Xi’an Shiyou University（Natural Science Edition）

摘　　要：为了应用Chrastil缔合模型准确地计算元素硫在酸性气体中的溶解度,以现有文献中元素硫在酸性气体中的溶解度实验数据为依据,对前人采用的2种Chrastil模型系数拟合方法的Chrastil模型预测硫溶解度的效果进行了分析。结果表明:采用第一种拟合方法得到的Chrastil模型系数不能用来进行元素硫溶解度预测;而采用方法二得出的模型系数,可以预测溶解度随气体密度的变化趋势,但其预测误差偏大。为此,针对第二种拟合方法提出了一种计算Chrastil模型系数的改进拟合方法(二重变量循环法)。实例应用结果表明:在所研究的温度压力范围内,改进后的拟合方法使Chrastil缔合模型在预测精度上有较大幅度的提高,拟合的相对误差小于5%。In order to accurately predict the solubility of elemental sulfur in acid gas mixture using Chrastil’s association model,based on the experimental data of the solubility of elemental sulfur in acid gases in the related literature,the sulfur solubility prediction effects of the Chrastil model whose coefficients are obtained by two kinds of fitting methods were analyzed,and the results show that,the Chrastil model coefficients obtained by the first kind of fitting method can not used for the prediction of the sulfur solubility,the Chrastil model coefficients obtained by the second kind of fitting method can be used,but the prediction accuracy is very low. For this reason,the second kind of fitting method is improved. The application results of cases show that,in the temperature and pressure ranges in this paper,the prediction accuracy of the Chrastil model whose coefficients are calculated by the improved fitting method is high,and its average relative fitting error is less than 5%.

关 键 词：元素硫的溶解性 酸性气体 Chrastil缔合模型 

分 类 号：TE311[石油与天然气工程—油气田开发工程]