Separation of azeotropic mixtures using air microbubbles generated by fluidic oscillation
Separation of azeotropic mixtures using air microbubbles generated by fluidic oscillation
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DOI：
10.1002/aic.15097
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发表时间：
2016-04-01
期刊：
影响因子：
3.7
通讯作者：
Zimmerman, William B.
中科院分区：
文献类型：
--
作者：
Abdulrazzaq, Nada;Al-Sabbagh, Baseem;Zimmerman, William B.
提出了用微泡间歇精馏分离乙醇-水共沸混合物的可行性。考察了鼓泡槽内液体混合物的深度和入口空气微泡温度对处理效率的影响。对于所有考虑的液体乙醇摩尔分数，包括共沸物，在气相中乙醇的浓缩比在平衡条件下实现的要高。通过降低液体混合深度和提高空气微泡温度，提高了乙醇的分离效率。在最低液位(3 Mm)和最高空气微泡温度(90℃)的条件下，可得到纯度约为98.2%的乙醇。分离时，液体混合物的温度在3 mm处略有上升(4℃)，蒸发时间为90分钟，使该系统适用于处理温度敏感的混合物。(C)2015美国化学工程师学会学报，62：1192-1199,2016
The feasibility of separating the azeotropic mixture of ethanol-water using microbubble-mediated batch distillation is presented. The effects of the depth of the liquid mixture in the bubble tank and of the inlet air microbubble temperature on the process efficiency were investigated. The enrichment of ethanol in the vapor phase was higher than that achieved at equilibrium conditions for all liquid ethanol mole fractions considered, including the azeotrope. On decreasing the depth of the liquid mixture and increasing the temperature of the air microbubbles, the separation efficiency of ethanol was improved. Ethanol with purity of about 98.2 vol % was obtained using the lowest liquid level (3 mm) in conjunction with the highest air microbubble temperature (90 degrees C). Separation was achieved with a small rise in the temperature of the liquid mixture (4 degrees C) at a depth of 3 mm and evaporation time of 90 min making this system suitable for treating thermally sensitive mixtures. (c) 2015 American Institute of Chemical Engineers AIChE J, 62: 1192-1199, 2016