高校化学工程学报2018，Vol.32Issue(1)：16-23,8.DOI:10.3969/j.issn.1003-9015.2018.01.003
芍药苷及芍药内酯苷在超临界CO2中无限稀释扩散系数的测定与计算
Measurements and Prediction of Infinite Diffusion Coefficients of Paeoniflorin and Albiflorin in Supercritical Carbon Dioxide
吕惠生 1王智 1耿中峰 1李永辉 1吕春柳 1刘双彦1
作者信息
- 1. 天津大学 石油化工技术开发中心教育部绿色合成与转化重点实验室, 天津 300072
- 折叠
摘要
Abstract
Diffusion coefficients of paeoniflorin and albiflorin in SC(supercritical)-CO2were measured using Taylor peak extension under 308.15~328.15 K and 10~18 MPa. Effects of temperature, pressure and modifier content on diffusion coefficients were investigated. The diffusion coefficients of the two solutes increase with the increase of temperature and decrease with the increase of pressure or modifier content. Associated equations between the diffusion coefficients and the density of paeoniflorin and albiflorin were established, and the best fitting equation was selected. The diffusion coefficients of paeoniflorin and albiflorin in SC-CO2/CH3CH2OH were predicted by the modified Wilke-Chang model, modified Hayduck-Minhas model, modified Lusis-Ratcliff model and Dymond-Hildbrand-Batschinski (DHB) model. Compared with the experimental results, the DHB model shows the best prediction and the average absolute deviations of paeoniflorin and albiflorin are 3.11 % and 4.96 %, respectively.关键词
芍药苷/芍药内酯苷/超临界二氧化碳/乙醇/扩散系数/Taylor峰扩展法Key words
paeoniflorin/albiflorin/supercritical carbon dioxide/ethanol/diffusion coefficient/Taylor peak extension method分类
化学化工引用本文复制引用
吕惠生,王智,耿中峰,李永辉,吕春柳,刘双彦..芍药苷及芍药内酯苷在超临界CO2中无限稀释扩散系数的测定与计算[J].高校化学工程学报,2018,32(1):16-23,8.
