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Thermodynamic analysis of dehydrogenation reaction of isobutane
FU Yun-zhi, XU Yuan-ming, ZHUO Run-sheng
(Key Laboratory of Petrochemical Detecting Techniques of Hainan Province in Hainan University, Haikou 570228, China)
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