STUDY ON THE IMPACT OF DEFOAMING AGENT ON THE EFFICIENCIES OF SEPARATION BY DISTILLATION
Zhelcho St. Stefanov, Mariana Kr. Karaivanova
Pages: 479-485
Published: 1 Jan 2012
Views: 61
Abstract: The effect of a defoaming agent on the gas-liquid layer height and, respectively, the size of the interphase surface and hence on the degree of separation by distillation was studied. The experimental results obtained with a model mixture methanol-water were carried out in a laboratory sieve-plate glass column in presence of defoaming agent SIHA Silicone defoamer SE. The comparative analysis of the model mixture studied with and without defoaming agent showed that the presence of defoaming agent gave foam height about 2 – 2.5 times smaller yet at vapor velocity in the column with defoaming agent about 1.5 times higher than that without defoaming agent. The values of the local efficiency in presence of defoaming agent were about 10% lower. This certainly confirms the fact that the lower foam height in presence of defoaming agent, i.e. the smaller interphase area, results in decreased process efficiency.
Keywords: distillation, local efficiency, defoaming agent, lower boiling component (lbc), higher boiling component (hbc), surface tension
Cite this article: Zhelcho St. Stefanov, Mariana Kr. Karaivanova. STUDY ON THE IMPACT OF DEFOAMING AGENT ON THE EFFICIENCIES OF SEPARATION BY DISTILLATION. Journal of International Scientific Publications: Materials, Methods & Technologies 6, 479-485 (2012). https://www.scientific-publications.net/en/article/1003231/
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