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Chemcial Industry and Engineering 2017, Vol. 34 Issue (2) :45-49,95    DOI: 10.13353/j.issn.1004.9533.20151051
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Thermodynamic Calculation and Analysis of Hydrogenation of Acetic Acid or Acetic Ester to Ethanol
Sun Chengwei, Guo Cuili, Ye Chenliang
School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China

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Abstract 

The thermodynamics of hydrogenation of acetic acid or acetic ester to ethanol had been analyzed. The enthalpy changes and the standard equilibrium constants of the three reactions were calculated. The effects of temperature, pressure and the molar ratio of reagents on the equilibrium conversion of acetic acid or acetic ester were researched. The result shows that all the enthalpy changes of the three reactions are less than 0, so the reactions are exothermic. The reaction conditions can not make a great influence on the conversion of acetic acid, because the standard equilibrium constant is comparatively large. However, the reaction conditions make a great effect on the conversion of acetic esters due to their small standard equilibrium constants. For the hydrogenation of acetic ester to ethanol, the suitable reaction temperature is 423-550 K and the suitable reaction pressure is 2-3 MPa and the suitable molar ratio of hydrogen and acetic ester is 10-20.

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Articles by authors
Sun Chengwei
Guo Cuili
Ye Chenliang
Keywordsacetic acid;   acetic ester;   hydrogenation;   ethanol;   thermodynamic     
Received 2015-04-09;
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Sun Chengwei, Guo Cuili, Ye Chenliang.Thermodynamic Calculation and Analysis of Hydrogenation of Acetic Acid or Acetic Ester to Ethanol[J]  Chemcial Industry and Engineering, 2017,V34(2): 45-49,95
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