摘要
根据电解质溶液理论,对Nass和P inho等人提出的氨基酸在NaC l水溶液中溶解度的UNIFAC模型特点进行了分析比较。采用Chen等人提出的电解质型三元体系NRTL活度系数关联方程,结合考虑Born项和P itzer-Debye-Hückel项对基团间长程相互作用力的贡献,在简化基础上,建立了计算IDA-NaC l-H2O三元体系溶解度数学模型。采用该模型对此体系0—60℃范围内的溶解度随温度变化关系进行关联计算,并与实测结果进行对比分析,结果令人满意,二者的平均相对误差为2.93%。按照基团静电作用机制,理论解释了NaC l浓度对IDA溶解度的影响规律。
According to the equilibrium theory of electrolyte solution system, the characteristics of UNIFAC models for amino acid solubility in NaCl-H2O supposed by Nass and Pinho were analyzed. Taking into account of the contribution by Born item and Pitzer-Debye-Hückel item to the long-range force between the groups, an extended electrolyte NRTL model of Chen was established and applied to the ternary system consisting of IDA-NaCl-H2O. By the model, the solubility of IDA at different NaCl concentrations and at the temperatures from 0-60 ℃ were correlated and predicted. The modeling results are coincided well with the experimental data, the relative deviation is under 2.93%. The effect of NaCl concentration on the solubility of IDA was explained theoretically by static interaction mechanism of the groups.
出处
《化学工程》
CAS
CSCD
北大核心
2006年第1期44-47,共4页
Chemical Engineering(China)
基金
湖南省自然科学基金项目(01JJY2010)
湖南省科技攻关项目(02GKY3023)
