Experimental study of multiple steady states in homogeneous azeotropic distillation
Experimental study of multiple steady states in homogeneous azeotropic distillation
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DOI：
10.1021/ie960522g
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发表时间：
1997-03
影响因子：
4.2
通讯作者：
T. E. Güttinger;and Cornelius Dorn;M. Morari
中科院分区：
文献类型：
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作者：
T. E. Güttinger;and Cornelius Dorn;M. Morari
Bekiaris等人。(1993)在分析无限回流和无限塔长(无限塔数)情况的基础上，解释了均相三元共沸精馏中多个稳态的存在。结果表明，这种无限长塔的多稳态预测对有限回流操作的有限长塔具有一定的指导意义。本文对三元均相体系甲醇-−-丁酸甲酯-−-甲苯进行了实验研究。实验结果表明，由于气相−-液-−平衡的存在，存在多个稳态(输出倍数)。在工业中试塔上进行的实验表明，在相同的进料流量和组成以及相同的操作参数下，存在两个稳定的稳态。测量结果与使用∞/∞分析工具得到的无限长柱的预测以及逐级模拟结果非常吻合。这些实验是第一次发表……
Bekiaris et al. (1993) explained the existence of multiple steady states in homogeneous ternary azeotropic distillation, on the basis of the analysis of the case of infinite reflux and infinite column length (infinite number of trays). They showed that the predictions of multiple steady states for such infinite columns have relevant implications for columns of finite length operated at finite reflux. In this article, experiments are described for the ternary homogeneous system methanol−methyl butyrate−toluene which demonstrate the existence of multiple steady states (output multiplicities) caused by the vapor−liquid−equilibrium. The experiments on an industrial pilot column show two stable steady states for the same feed flow rate and composition and the same set of operating parameters. The measurements are in excellent agreement with the predictions obtained for infinite columns using the ∞/∞ analysis tools as well as with stage-by-stage simulation results. These experiments represent the first publishe...