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微波对乙醇-苯体系汽液平衡和间歇精馏的影响

发表时间:2013-04-15  浏览量:1306  下载量:534
全部作者: 侯钧,徐世民,丁辉,丁志伟
作者单位: 天津大学化工学院
摘 要: 采用自制的微波发生器和Othmer汽液平衡釜耦合,建立微波场下的汽液平衡装置,测定了乙醇-苯体系在不同微波功率(0,50,100,200 W)下的汽液平衡数据。实验结果表明,微波对乙醇-苯的汽液平衡没有改变。在微波汽液平衡的基础上,建立微波间歇精馏装置,进行了乙醇-苯体系在微波功率为150 W下不同初始组成的间歇精馏实验。实验结果表明,微波对塔顶馏分的组成与常规条件相比,没有明显改变,但能显著提高塔顶馏分的采出速度。塔顶采出相同质量的馏分,微波作用条件下的操作时间几乎是常规加热条件的一半,微波作用于乙醇-苯体系的间歇精馏效率大大提高。
关 键 词: 化学分离工程;微波;汽液平衡;间歇精馏;乙醇-苯体系
Title: Effect of microwave on vapor-liquid equilibrium and batch distillation for ethanol-benzene system
Author: HOU Jun, XU Shimin, DING Hui, DING Zhiwei
Organization: School of Chemical Engineering, Tianjin University
Abstract: The microwave vapor-liquid equilibrium (VLE) apparatus was established by coupling the microwave generator and the modified Othmer still, and the microwave VLE data of ethanol-benzene system were determined at different microwave power (0, 50, 100, 200 W). The experiment results showed that microwave energy did not change the VLE of ethanol-benzene system. The apparatus of microwave batch distillation was also set up based on microwave VLE. Furthermore, the ethanol-benzene batch distillation experiment was performed with different initial mole fraction at the microwave power of 150 W. The experiment results showed that microwave energy did not change the mole fraction of tower distillate compared with the conventional condition, but improved the rate of tower distillate recovery. The operational time at microwave condition was about half of the time at conventional condition for obtaining the same tower distillate. The efficiency of batch distillation for ethanol-benzene system was improved markedly with the microwave.
Key words: chemical separation engineering; microwave; vapor-liquid equilibrium; batch distillation; ethanol-benzene system
发表期数: 2013年4月第7期
引用格式: 侯钧,徐世民,丁辉,等. 微波对乙醇-苯体系汽液平衡和间歇精馏的影响[J]. 中国科技论文在线精品论文,2013,6(7):684-689.
 
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