| 超临界流体萃取筛板塔中二氧化碳/醇/水体系流体力学特性和传质性能的初步研究 |
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| 引用本文： | 李德昌,张泽廷,朱美文,于恩平.超临界流体萃取筛板塔中二氧化碳/醇/水体系流体力学特性和传质性能的初步研究[J].化工学报,1993(1). |
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| 作者姓名： | 李德昌 张泽廷 朱美文 于恩平 |
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| 作者单位： | 北京化工学院化工系 北京100029.广西化工研究所
(李德昌)，北京化工学院化工系 北京100029
(张泽廷，朱美文)，北京化工学院化工系 北京100029(于恩平) |
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| 基金项目： | 化工部发展基金，国家自然科学基金资助项目 |
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| 摘 要： | 在内径25mm的连续逆流超临界流体萃取筛板塔中,对超临界二氧化碳/乙醇/水和二氧化碳/异丙醇/水2种体系的流体力学特性和传质性能进行了实验研究;对实验数据进行了分析处理,得到了描述超临界流体萃取筛板塔流动特性的关联式,应用柱塞流模型对超临界流体萃取筛板塔的传质性能进行了模拟计算.
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| 关 键 词： | 超临界萃取筛板塔 连续逆流 流体动力学 传质 |
STUDY ON HYDRODYNAMICS AND MASS TRANSFER CHARACTERISTICS OF CARBON DIOXIDE / ALCOHOL / WATER SYSTEMS IN A SUPERCRITICAL FLUID EXTRACTION SIEVE - TRAY COLUMN |
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| Li Dechang,Zhang Zeting,Zhu Meiwen and Yu Enping.STUDY ON HYDRODYNAMICS AND MASS TRANSFER CHARACTERISTICS OF CARBON DIOXIDE / ALCOHOL / WATER SYSTEMS IN A SUPERCRITICAL FLUID EXTRACTION SIEVE - TRAY COLUMN[J].Journal of Chemical Industry and Engineering(China),1993(1). |
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| Authors: | Li Dechang Zhang Zeting Zhu Meiwen and Yu Enping |
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| Abstract: | A study on hydrodynamics and mass transfer characteristics was carried out in acontinuous counter-current sieve - tray extraction column of 25mm in diameter operated in the supercritical solvent region. The supercritical systems studied were carbon dioxide / ethanol / water and carbon dioxide / isopropanol /water. Correlation of all experimental data gave the following flow equation for a supercritical fluid extraction sieve - tray column:
Where v=221. 32 m/h, n = 0. 54, m=- 0. 18 for carbon dioxide /ethanol /water system,
v=195. 82 m/h, n = 0. 54, m= - 0. 03 for carbon dioxide / isopropanol / water system.
The experimental data under steady state were used to estimate the parameters of mass transfer , NOLP , HOLP and KOLa, with a plug - flow model. |
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| Keywords: | supercritical fluid extraction sieve - tray column continuous countercurrent hydrodynamics mass transfer |
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