化工中间体
化工中間體
화공중간체
CHEMICAL INTERMEDIATE
2010年
7期
35-39
,共5页
硝基苯%催化加氢%温度%热力学分析
硝基苯%催化加氫%溫度%熱力學分析
초기분%최화가경%온도%열역학분석
nitrobenzene%catalytic hydrogenation%temperature%thermodynamic analysis
用基团估算法计算了硝基苯的热力学数据。对硝基苯催化加氢制苯胺进行了比较详细的热力学分析,首次建立了该反应的反应焓变、Gibbs自由能以及反应平衡常数的变化与反应温度的关系。得出该反应为自发放热反应,反应温度越高,趋于热力学平衡程度越低。
用基糰估算法計算瞭硝基苯的熱力學數據。對硝基苯催化加氫製苯胺進行瞭比較詳細的熱力學分析,首次建立瞭該反應的反應焓變、Gibbs自由能以及反應平衡常數的變化與反應溫度的關繫。得齣該反應為自髮放熱反應,反應溫度越高,趨于熱力學平衡程度越低。
용기단고산법계산료초기분적열역학수거。대초기분최화가경제분알진행료비교상세적열역학분석,수차건립료해반응적반응함변、Gibbs자유능이급반응평형상수적변화여반응온도적관계。득출해반응위자발방열반응,반응온도월고,추우열역학평형정도월저。
Thermodynamic data of nitrobenzene was calculated with group contribution.In this paper,catalytic hydrogenation of nitrobenzene aniline carried out a more detailed thermodynamic analysis,for the entire process has an important guiding significance.The use of thermodynamic principle,first established the relationship among reaction enthalpy,Gibbs free energy,as well as changes in the equilibrium constant with reaction temperature.Obtained results that it was the spontaneous exothermic reaction and the higher the temperature the lower the degree of thermodynamic equilibrium.
