萃取丁香油的数值模拟

摘要/Abstract

摘要：

基于扩散模型方程和集总参数模型方程，首次建立了具有3个可调参数的两步扩散模型方程。该模型同时考虑固体颗粒内扩散阻力与内壁的阻力，能较好地描述超临界流体萃取过程。用两步扩散模型方程模拟了超临界CO₂萃取丁香油的动态过程，在实验温度与压力范围内模型计算值与实验数据的平均相对误差AARD在2.33%～19.48%之间，所有实验点的AARD为8.09%。而用扩散模型方程和集总参数模型方程模拟，所有实验点的AARD分别为17.51%和8.13%，表明两步扩散模型对于超临界CO₂萃取丁香油的传质过程的模拟效果优于扩散模型方程和集总参数模型方程。

关键词: FONT-FAMILY: 宋体, mso-bidi-font-size: 12.0pt, mso-font-kerning: 1.0pt, mso-ascii-font-family: Times New Roman, mso-bidi-font-family: 宋体, mso-ansi-language: EN-US, mso-fareast-language: ZH-CN, mso-bidi-language: AR-SA">超临界FONT-FAMILY: Times New Roman, mso-bidi-font-size: 12.0pt, mso-fareast-font-family: 宋体, mso-font-kerning: 1.0pt, mso-hansi-font-family: 宋体, mso-bidi-font-family: 宋体, mso-ansi-language: EN-US, mso-fareast-language: ZH-CN, mso-bidi-language: AR-SA">CO₂FONT-FAMILY: 宋体, mso-bidi-font-size: 12.0pt, mso-font-kerning: 1.0pt, mso-ascii-font-family: Times New Roman, mso-bidi-font-family: 宋体, mso-ansi-language: EN-US, mso-fareast-language: ZH-CN, mso-bidi-language: AR-SA">萃取；丁香油；数值模拟

Abstract:

A new mathematical model，the two-step diffusion model with three adjustable parameters，was developed based on the diffusion model and the lumped parameter model. Both internal diffusion resistance and solid solute internal wall resistance were considered to make the model a good description to supercritical fluid extraction (SFE) process. The supercritical CO₂ extraction of clove oil is simulated. The comparison with the experimental data indicates that the values of AARD are between 2.33% and 19.48% under different experimental conditions，and the overall value of AARD is 8.09%. The experimental data for clove oil are also used to compare with the simulation by the diffusion model and the lumped model，and the overall values of AARD are 17.51%，8.13%，respectively，so the two-step diffusion model is better for simulating the process of supercritical CO₂ extraction of clove oil.

Key words: FONT-FAMILY: 宋体, mso-bidi-font-size: 12.0pt, mso-font-kerning: 1.0pt, mso-ascii-font-family: Times New Roman, mso-bidi-font-family: 宋体, mso-ansi-language: EN-US, mso-fareast-language: ZH-CN, mso-bidi-language: AR-SA">超临界FONT-FAMILY: Times New Roman, mso-bidi-font-size: 12.0pt, mso-fareast-font-family: 宋体, mso-font-kerning: 1.0pt, mso-hansi-font-family: 宋体, mso-bidi-font-family: 宋体, mso-ansi-language: EN-US, mso-fareast-language: ZH-CN, mso-bidi-language: AR-SA">CO₂FONT-FAMILY: 宋体, mso-bidi-font-size: 12.0pt, mso-font-kerning: 1.0pt, mso-ascii-font-family: Times New Roman, mso-bidi-font-family: 宋体, mso-ansi-language: EN-US, mso-fareast-language: ZH-CN, mso-bidi-language: AR-SA">萃取；丁香油；数值模拟

刘乃汇, 李淑芬, 关文强. 萃取丁香油的数值模拟 [J]. 化工学报, 2011, 62(7): 1933-1937.

LIU Naihui, LI Shufen, GUAN Wenqiang. Simulation of supercritical CO₂ extraction of clove oil by two-step diffusion model[J]. CIESC Journal, 2011, 62(7): 1933-1937.

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