摘要
模拟传统发酵,将PTFE膜用于不凝气中乙醇/水蒸气的分离,研究了不凝气中乙醇浓度、进料温度、膜后真空度等操作条件对膜分离性能的影响,并对PTFE膜和ePTFE膜进行比较.结果表明,PTFE膜渗透通量随着气体中乙醇摩尔分数、进料温度、膜后真空度的增加而增加,温度与渗透通量符合Ar-rhenius方程.PTFE膜分离因子随气体中乙醇摩尔分数、进料温度的增加而增加,随膜后真空度的增加而减小.ePTFE膜相对于PTFE膜来说,具有较高的渗透通量,分离效果较好,有利于乙醇/水蒸气的分离.
To Simulate the traditional fermentation, PTFE membrane is applied in the separation of ethanol/ water vapor in the non-condensable gas. This paper not only analyses the operating conditions such as the con- centration of ethanol in the non-condensable gas, the temperature and the downstream pressure influence on the membrane＇ s separation performance , but also compares the PTFE membrane with the ePTFE membrane＇ s influence on separation . The result shows that with the increase of the concentration of ethanol in gas, the temperature and the downstream pressure, the PTFE membrane＇ s permeation flux increases, the permeation flux conforms to Arrhenius equation. With regard to the PTFE membrane＇ s separation factor, it increases with the increase of the concentration of ethanol in gas, the temperature and decreases with the increase of the downstream pressure, ePTFE membrane which has better separation performance compared with PTFE membrane is beneficial to the separation of ethanol/water vapor.
出处
《郑州大学学报（工学版）》
CAS
北大核心
2012年第3期91-94,共4页
Journal of Zhengzhou University（Engineering Science）
基金
国家科技支撑计划资助项目(2007BAD66B04)
