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首页> 外文期刊>Separation and Purification Technology >Process optimization studies for the dehydration of alcohol-water system by inorganic membrane based pervaporation separation using design of experiments (DOE)
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Process optimization studies for the dehydration of alcohol-water system by inorganic membrane based pervaporation separation using design of experiments (DOE)

机译：使用实验设计（DOE）的基于无机膜的全蒸发分离进行醇-水系统脱水的工艺优化研究

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摘要

In the present study, commercial ceramic membrane from Pervatech BV was used to study the dehydration of isopropanol-water mixture by pervaporation. The effects of feed temperature, feed concentration, permeate pressure and feed flow rate on the membrane separation performance were studied by using design of experiments (DOE) coupled with response surface methodology (RSM). The center composite design (CCD) was used to obtain optimum process condition. The results showed that in order to obtain optimum permeation flux and selectivity, the temperature, feed concentration of alcohol, permeate pressure and feed flow rate were 75 °C, 94wt%, 1 kPa and 84dm3/h, respectively. Under optimum operating condition, the permeation flux and selectivity was 2.41 kg/m2 h and 1131, respectively. The optimum permeation flux of 9.16 kg/m2 h was obtained at temperature of 90°C with feed concentration 81 wt% alcohol, permeate pressure of 1 kPa and feed flow rate of 100 dm3/h, respectively. However, the optimum selectivity of 1415 was observed at the temperature of 69 °C, feed concentration 96wt% alcohol, 1 kPa permeate pressure and feed flow rate of 41.05 dm3/h, respectively. The effect of operation time on the performance of the membrane was also investigated by running the pervaporation process for 8 h continuously. It was observed that the permeation flux changed with time but the selectivity remained nearly constant after 8 h of continuous pervaporation.
机译：在本研究中，Pervatech BV的商用陶瓷膜用于研究异丙醇-水混合物通过全蒸发的脱水作用。通过实验设计（DOE）结合响应面法（RSM）研究了进料温度，进料浓度，渗透压和进料流速对膜分离性能的影响。中心复合设计（CCD）用于获得最佳工艺条件。结果表明，为了获得最佳的渗透通量和选择性，醇的温度，进料浓度，渗透压力和进料流速分别为75°C，94wt％，1 kPa和84dm3 / h。在最佳操作条件下，渗透通量和选择性分别为2.41 kg / m2 h和1131。在90°C的温度下，进料浓度为81 wt％的酒精，渗透压为1 kPa和进料流速为100 dm3 / h时，最佳渗透通量为9.16 kg / m2 h。但是，在69°C的温度，进料浓度为96wt％的酒精，1 kPa的渗透压和41.05 dm3 / h的进料流速下，观察到最佳选择性为1415。通过连续运行全蒸发过程8小时，还研究了操作时间对膜性能的影响。观察到渗透通量随时间变化，但是在连续渗透8小时后，选择性几乎保持不变。

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