Kinetics, Gas-Liquid Mass Transfer, and Modeling of the Soybean Oil Hydrogenation Process

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• 作者：Benoit Fillion ; Badie I. Morsi ; Kevin R. Heier ; and Reinaldo M. Machado
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2002
• 出版时间：February 20, 2002
• 年：2002
• 卷：41
• 期：4
• 页码：697 - 709
• 全文大小：190K
• 年卷期：v.41,no.4(February 20, 2002)
• ISSN：1520-5045

文摘

The kinetics for soybean oil hydrogenation using a commercial Ni/Al₂O₃ catalyst were investigatedin a 2 × 10^-3 m³ agitated reaction calorimeter operating under a wide range of temperatures(383-443 K), pressures (0.12-0.68 MPa), and catalyst loadings (0.02-0.16 Ni wt %). A simplemodel (model 1) and a novel comprehensive model (model 2) were developed to describe thehydrogenation process based on Langmuir-Hinshelwood kinetic expressions. The catalystactivity and mass-transfer coefficients were incorporated in both models. Under isothermalconditions, modeling results showed that increasing k_La values and pressure and decreasingtemperature and catalyst loading decrease the trans fatty acid (TFA) content in the partiallyhydrogenated soybean oil. Using model 2, a nonisothermal batch reactor was simulated and theresults indicated that good heat-transfer control is required to minimize the amount of TFAproduced. Also, k_La appeared to be the rate-limiting step in the overall process, and accordinglyproper gas-liquid mixing is crucial in commercial hydrogenation reactors.