| 静止非牛顿流体中气泡生成过程的传质 |
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| 引用本文： | 易妍妍,王智慧,杨超,毛在砂,王启宝. 静止非牛顿流体中气泡生成过程的传质[J]. 化工学报, 2015, 66(11): 4335-4341. DOI: 10.11949/j.issn.0438-1157.20150417 |
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| 作者姓名： | 易妍妍 王智慧 杨超 毛在砂 王启宝 |
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| 作者单位： | 1.中国矿业大学(北京), 北京 100083;2.中国科学院过程工程研究所, 生化工程国家重点实验室, 北京 100190 |
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| 基金项目： | 国家自然科学基金项目(21206166,21427814);国家重点基础研究发展计划项目(2012CB224806)。 |
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| 摘 要： | 气泡生成过程中气液传质是气液接触设备的设计、优化的重要参考指标。以二氧化碳气泡在羧甲基纤维素钠(carboxymethyl cellulose,CMC)溶液中生成过程中的传质为研究对象,分别考察了气速、CMC溶液浓度、针头直径对气泡生成过程气液传质的影响,采用具有CCD显微相机的动态接触角分析仪测量了气泡形状、表面积和体积的变化,进而获得气泡生成过程气液传质系数kl。实验结果表明,CMC浓度从0.2%增加到0.8%,黏度逐渐增大,传质系数随CMC浓度的增大而增大;针头直径从2.5 mm增加到4 mm,传质系数也随之增大;气速从1 ml·min-1增加到9 ml·min-1,传质系数也逐渐增大。
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| 关 键 词： | 非牛顿流体 气泡生成 传质 二氧化碳 |
| 收稿时间： | 2015-04-02 |
| 修稿时间： | 2015-05-28 |
Mass transfer during single bubble growing in static non-Newtonian fluid |
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| YI Yanyan,WANG Zhihui,YANG Chao,MAO Zaisha,WANG Qibao. Mass transfer during single bubble growing in static non-Newtonian fluid[J]. Journal of Chemical Industry and Engineering(China), 2015, 66(11): 4335-4341. DOI: 10.11949/j.issn.0438-1157.20150417 |
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| Authors: | YI Yanyan WANG Zhihui YANG Chao MAO Zaisha WANG Qibao |
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| Affiliation: | 1.China University of Mining and Technology Beijing, Beijing 100083, China;2.National Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China |
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| Abstract: | The mass transfer process of growing bubbles has important effect on the design and optimization of gas-liquid contacting devices. By investigating a single carbon dioxide bubble growing in a sodium carboxymethyl cellulose (CMC) solution, the effects of gas velocity, concentration of CMC solution, and diameter of the needle on gas-liquid mass transfer were examined. The shape, surface area and volume of growing bubble were captured by a dynamic contact angle analysis instrument with a micro-CCD camera and the liquid mass transfer coefficient kl was calculated. The results show that the mass transfer coefficient increased with the solution viscosity as CMC concentration increased from 0.2% to 0.8%, with the diameter of the needle changing from 2.5 mm to 4 mm, and with the gas injection rate increased from 1 ml·min-1 to 9 ml·min-1. |
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| Keywords: | non-Newtonian fluid bubble growth mass transfer carbon dioxide |
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