| 摘要: |
| 对异丁烷脱氢反应体系中脱氢反应和裂解反应进行热力学计算,得到脱氢反应和裂解反应在温度298～900K的标准摩尔反应焓变、标准吉布斯自由能变和标准平衡常数值,对不同温度、不同压力对脱氢反应和裂解反应的影响进行分析,绘制平衡转化率随温度、压力的变化曲线。结果表明:异丁烷平衡转化率随温度的升高而增大,随反应压力的增加而减小;计算得到的数据可作为异丁烷脱氢生产异丁烯的依据。 |
| 关键词: 异丁烷 脱氢反应 裂解反应 热力学 |
| DOI：10.3969/j.issn.1673-5005.2014.03.025 |
| 分类号:O 642.1 〖HTH〗 |
| 基金项目:国家自然科学基金项目(51263006/E031301)；海南省自然科学基金项目(211009) |
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| Thermodynamic analysis of dehydrogenation reaction of isobutane |
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FU Yun-zhi, XU Yuan-ming, ZHUO Run-sheng
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(Key Laboratory of Petrochemical Detecting Techniques of Hainan Province in Hainan University, Haikou 570228, China)
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| Abstract: |
| Thermodynamic calculations of isobutane dehydrogenation and side cracking reaction were carried out. The thermodynamic data including enthalpy (ΔrHm), Gibbs energy (ΔrGm), and equilibrium constant of reaction at 298-900K were obtained. The influences of isobutane dehydrogenation and cracking reaction at different temperatures and pressures were analyzed. The correlation curves between equilibrium conversion of isobutane dehydrogenation and reaction conditions, such as temperature and pressure, were plotted. It is found that the conversion rate of isobutane increases with the rise of temperature, while it decreases with the rise of reaction pressure. The calculated data can be applied to guide the production of isobutene by isobutane dehydrogenation. |
| Key words: isobutane dehydrogenation reaction cracking reaction thermodynamics |
