详细信息
用状态方程模拟氨基酸水溶液的热力学性质
Modeling Thermodynamic Properties for Amino Acid Aqueous Solutions Using Equation of State
文献类型:期刊文献
中文题名:用状态方程模拟氨基酸水溶液的热力学性质
英文题名:Modeling Thermodynamic Properties for Amino Acid Aqueous Solutions Using Equation of State
作者:屈绍广[1];王昶昊[1];施云海[1];彭昌军[2];刘洪来[2]
机构:[1]华东理工大学化学工程研究所,上海200237;[2]华东理工大学化学系化学工程国家重点实验室,上海200237
年份:2015
卷号:41
期号:3
起止页码:281
中文期刊名:华东理工大学学报(自然科学版)
外文期刊名:Journal of East China University of Science and Technology
收录:CSTPCD;;Scopus;北大核心:【北大核心2014】;CSCD:【CSCD2015_2016】;
基金:国家自然科学基金(21276073;21136004);中央高校基本科研业务费(222201313001)
语种:中文
中文关键词:氨基酸;状态方程;密度;溶解度
外文关键词:amino acid; SWCF-VR; density; solubility
摘要:将变阱宽方阱链流体状态方程(SWCF-VR)应用到氨基酸水溶液系统热力学性质计算中,结合氨基酸水溶液的密度得到了17种氨基酸分子的模型参数。纯粹根据氨基酸和水分子的模型参数,SWCF-VR方程能预测17种氨基酸水溶液在不同温度和组成下的密度,总的平均相对偏差为0.43%,结果令人满意。如引入与温度相关的可调参数,该方程能高精度关联氨基酸水溶液的密度,总的平均相对偏差仅为0.012%。通过所获得的可调参数,SWCF-VR方程能预测所选氨基酸在水中的溶解度。
An equation of state for square-well chain fluids with variable range (SWCF-VR) was applied to calculate thermodynamic properties of amino acid aqueous solutions. The model parameters for 17 amino acids were obtained by combining the densities of amino acid aqueous solutions. SWCF-VR can give satisfactory prediction by only using molecular parameters of amino acid and water, and the overall average relative deviation (ARD) of density was 0.43%. Using an adjustable parameter associated with temperature, the density of binary solutions of amino acids can be correlated with a high precision, and ARD was only 0. 012%. Coupling with an adjustable parameter from density data, SWCF-VR can successfully predict the solubility of amino acid selected in water.
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