Investigation on molar heat capacity, standard molar enthalpy of combustion for guaiacol and acetyl guaiacol ester

doi:10.1016/j.cjche.2016.05.004

›› 2016, Vol. 24 ›› Issue (12): 1772-1778.DOI: 10.1016/j.cjche.2016.05.004

• Chemical Engineering Thermodynamics • 上一篇下一篇

Investigation on molar heat capacity, standard molar enthalpy of combustion for guaiacol and acetyl guaiacol ester

Changshuai Shen, Wenli Li, Cairong Zhou

School of Chemical Engineering and Energy, Zhengzhou University, Zhengzhou 450001, China

收稿日期:2016-01-12 修回日期:2016-05-09 出版日期:2016-12-28 发布日期:2017-01-04
通讯作者: Cairong Zhou,E-mail address:zhoucairong@zzu.edu.cn

Investigation on molar heat capacity, standard molar enthalpy of combustion for guaiacol and acetyl guaiacol ester

Changshuai Shen, Wenli Li, Cairong Zhou

School of Chemical Engineering and Energy, Zhengzhou University, Zhengzhou 450001, China

Received:2016-01-12 Revised:2016-05-09 Online:2016-12-28 Published:2017-01-04

摘要/Abstract

摘要： The molar heat capacities (C_p) of guaiacol (CAS 90-50-1) and acetyl guaiacol ester (AGE, CAS 613-70-7) were determinated from 290 K to 350 K by differential scanning calorimetry (DSC), and expressed as a function of temperature. Two kinds of group contribution models were used to estimate the molar heat capacities of both guaiacol and AGE, the average relative deviation is less than 10%. The standard molar enthalpies of combustion of guaiacol and AGE were -3590.0 kJ·mol^-1 and -4522.1 kJ·mol^-1 by a precise thermal isolation Oxygen Bomb Calorimeter. The standard molar enthalpies of formation of guaiacol and AGE in a liquid state at 298.15 K were calculated to be -307.95 kJ·mol^-1 and -448.72 kJ·mol^-1, respectively, based on the standard molar enthalpies of combustion. The thermodynamic properties are useful for exploiting the new synthesis method, engineering design and industry production of AGE using guaiacol as a raw material.

关键词: Guaiacol, Acetyl guaiacol ester (AGE), Molar heat capacity, Standard molar enthalpy of combustion

Abstract: The molar heat capacities (C_p) of guaiacol (CAS 90-50-1) and acetyl guaiacol ester (AGE, CAS 613-70-7) were determinated from 290 K to 350 K by differential scanning calorimetry (DSC), and expressed as a function of temperature. Two kinds of group contribution models were used to estimate the molar heat capacities of both guaiacol and AGE, the average relative deviation is less than 10%. The standard molar enthalpies of combustion of guaiacol and AGE were -3590.0 kJ·mol^-1 and -4522.1 kJ·mol^-1 by a precise thermal isolation Oxygen Bomb Calorimeter. The standard molar enthalpies of formation of guaiacol and AGE in a liquid state at 298.15 K were calculated to be -307.95 kJ·mol^-1 and -448.72 kJ·mol^-1, respectively, based on the standard molar enthalpies of combustion. The thermodynamic properties are useful for exploiting the new synthesis method, engineering design and industry production of AGE using guaiacol as a raw material.

Key words: Guaiacol, Acetyl guaiacol ester (AGE), Molar heat capacity, Standard molar enthalpy of combustion

Changshuai Shen, Wenli Li, Cairong Zhou. Investigation on molar heat capacity, standard molar enthalpy of combustion for guaiacol and acetyl guaiacol ester[J]. , 2016, 24(12): 1772-1778.

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Investigation on molar heat capacity, standard molar enthalpy of combustion for guaiacol and acetyl guaiacol ester

Investigation on molar heat capacity, standard molar enthalpy of combustion for guaiacol and acetyl guaiacol ester

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