CIESC Journal ›› 2020, Vol. 71 ›› Issue (7): 2983-2992.DOI: 10.11949/0438-1157.20191515

• Thermodynamics • Previous Articles     Next Articles

Vapor-liquid equilibrium for citral + α-ionone + β-ionone systems using headspace gas chromatography method

Pei ZHENG1(),Linlin WANG1,2(),Jiezhen LIANG1,2,Xiaopeng CHEN1,2,Zhangfa TONG1,2,Xiaojie WEI1,2,Rui TANG1   

  1. 1.College of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, Guangxi, China
    2.Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology, Nanning 530004, Guangxi, China
  • Received:2019-12-16 Revised:2020-04-15 Online:2020-07-05 Published:2020-07-05
  • Contact: Linlin WANG

顶空气相色谱法研究柠檬醛+α-紫罗兰酮+β-紫罗兰酮体系的汽液平衡

郑佩1(),王琳琳1,2(),梁杰珍1,2,陈小鹏1,2,童张法1,2,韦小杰1,2,唐锐1   

  1. 1.广西大学化学化工学院, 广西 南宁 530004
    2.广西石化资源加工及过程强化技术重点实验室, 广西 南宁 530004
  • 通讯作者: 王琳琳
  • 作者简介:郑佩(1995—),女,硕士研究生,570079656@qq.com
  • 基金资助:
    国家自然科学基金项目(21878056);广西石化资源加工及过程强化技术重点实验室课题基金(2016Z002)

Abstract:

Isothermal vapor-liquid equilibrium (VLE) data for citral (1) +α-ionone (2), citral (1) +β-ionone (2) and α-ionone (1) +β-ionone (2) were measured at 333.15, 368.15 and 403.15 K using headspace gas chromatography method. Redlich-Kister area test method and van Ness point test method were used to check the thermodynamic consistency. Aspen plus V10.0 software and Britt-Luecke algorithm were used to return the NRTL and UNIQUAC activity coefficient model parameters. Furthermore,the excess Gibbs energy (GE) for all systems were calculated using the NRTL model. The results showed all experimental p-T-x-y data satisfied the requirements of thermodynamic consistency. The maximum absolute average deviation (AAD) of vapor compositions between calculated and experimental data for citral (1) +α-ionone (2), citral (1) +β-ionone (2) and α-ionone (1) +β-ionone (2) systems at the measured temperatures were 0.0044,0.0060 and 0.0032, respectively. The maximum GE for three systems were 0.4002, 0.2315 and–0.7143 kJ·mol-1, respectively.

Key words: citral, α-ionone, β-ionone, chromatography, vapor-liquid equilibrium, activity coefficient

摘要:

采用顶空气相色谱法测定了柠檬醛(1)+ α-紫罗兰酮(2)、柠檬醛(1)+ β-紫罗兰酮(2)和α-紫罗兰酮(1)+ β-紫罗兰酮(2)体系在333.15、368.15和403.15 K温度下的等温汽液相平衡数据;采用Redlich-Kister面积检验法和van Ness点检验法进行热力学一致性检验;采用Aspen plus V10.0软件、Britt-Luecke算法回归NRTL和 UNIQUAC活度系数模型参数;采用NRTL活度系数模型计算体系的超额自由焓(GE)。结果表明,所测体系的p-T-x-y数据均符合热力学一致性;柠檬醛(1)+ α-紫罗兰酮(2)、柠檬醛(1)+ β-紫罗兰酮(2)和α-紫罗兰酮(1)+ β-紫罗兰酮(2)体系的气相组成(y1)的计算值与实验值的最大平均绝对偏差(AAD)分别为0.0044、0.0060和0.0032;三组二元体系 GE的正、负偏差最大值分别为0.4002、0.2315和 –0.7143 kJ·mol-1

关键词: 柠檬醛, α-紫罗兰酮, β-紫罗兰酮, 色谱, 汽液平衡, 活度系数

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