Application of Response Surface Methodology and Experimental Design in Direct Contact Membrane Distillation

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• 作者：Mohamed Khayet ; Cornel Cojocaru ; Carmen Garc&iacute ; a-Payo
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2007
• 出版时间：August 15, 2007
• 年：2007
• 卷：46
• 期：17
• 页码：5673 - 5685
• 全文大小：395K
• 年卷期：v.46,no.17(August 15, 2007)
• ISSN：1520-5045

文摘

The experimental design and response surface methodology (RSM) is applied to a direct contact membranedistillation process. The factors considered for experimental design were the feed and permeate flow rate, themean temperature, and the initial feed concentration of salt (NaCl) aqueous solution. The significant factorswere optimized using a central composite design of orthogonal type. The quadratic models between theresponses (permeate fluxes) and the independent parameters were built for both commercial and laboratorymade membranes of different characteristics. The response surface models were tested with analysis of variance(ANOVA). For optimization purposes, the canonical analysis was employed. An algorithm was developedfollowing the gradient method and using step adjustment in order to explore the response surface only insidethe region of experimentation. The obtained optimal points were located in the valid region. The predictedpermeate fluxes were compared with the experimental ones. In general, there is a good agreement betweenthe experimental and the predicted permeate fluxes by RSM.