Microbubble Distillation for Ethanol-Water Separation
Microbubble Distillation for Ethanol-Water Separation
复制标题
DOI：
10.1155/2016/5210865
复制
发表时间：
2016-01-01
影响因子：
2.7
通讯作者：
Zimmerman, William B.
中科院分区：
文献类型：
--
作者：
Al-yaqoobi, Atheer;Hogg, David;Zimmerman, William B.
本文研究了利用微泡蒸馏技术分离乙醇-水混合物的新方法。传统的蒸馏过程需要大量的能量来将液体升高到其沸点以实现挥发性组分的去除。相比之下，微泡蒸馏的概念是加热气相而不是液相来实现分离。以从热敏发酵液中去除乙醇为例进行了研究。因此，然后将结果与在“理想”蒸馏装置中预期的平衡条件下可获得的结果进行比较。微泡蒸馏所获得的蒸汽组成高于传统平衡条件下所获得的蒸汽组成。分离在液体温度显著低于混合物的沸点下实现。此外，据观察，微泡蒸馏的分离效率可以通过提高注入空气的温度而增加，而液体混合物的温度仅适度增加。比较了微泡蒸馏和渗透汽化两种分离方法从热敏发酵液中回收生物乙醇的分离效果。该技术可以被控制以提供高分离和能量效率。这可能有助于提高生物燃料生产和生物炼制加工的其他副产品的商业可行性。
In the current study, a novel approach for separating ethanol-water mixture by microbubble distillation technology was investigated. Traditional distillation processes require large amounts of energy to raise the liquid to its boiling point to effect removal of volatile components. The concept of microbubble distillation by comparison is to heat the gas phase rather than the liquid phase to achieve separation. The removal of ethanol from the thermally sensitive fermentation broths was taken as a case of study. Consequently the results were then compared with those which could be obtained under equilibrium conditions expected in an "ideal" distillation unit. Microbubble distillation has achieved vapour compositions higher than that which could be obtained under traditional equilibrium conditions. The separation was achieved at liquid temperature significantly less than the boiling point of the mixture. In addition, it was observed that the separation efficiency of the microbubble distillation could be increased by raising the injected air temperature, while the temperature of the liquid mixture increased only moderately. The separation efficiency of microbubble distillation was compared with that of pervaporation for the recovery of bioethanol from the thermally sensitive fermentation broths. The technology could be controlled to give high separation and energy efficiency. This could contribute to improving commercial viability of biofuel production and other coproducts of biorefinery processing.