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Forward-osmosis-aided concentration of fructose sugar through hydrophilized polyamide membrane: Molecular modeling and economic estimation

机译:通过亲水化聚酰胺膜的果糖糖的前渗透浓度:分子建模和经济估计

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摘要

In this study, a thin-film composite membrane based on hydrophilized polyamide was synthesized for the concentration of an aqueous fructose solution using a forward-osmosis (FO) technique. The membrane was prepared by the addition of excess m-phenylenediamine along with a small quantity of dipolar aprotic dimethyl sulfoxide solvent in the aqueous reaction bath followed by excess trimesoyl chloride in an organic bath with a longer time provided for interfacial polymerization to minimize fructose losses. The effect of operating parameters such as draw NaCl concentration, cross-flow velocity, and temperature on FO performance was evaluated. Membrane characterization was performed using scanning electron microscopy, Fourier transform infrared spectroscopy, and X-ray diffraction to study the physicochemical properties. A coupled model based on molecular modeling and computational fluid dynamics was developed to study the diffusion behavior and concentration profiles of the two solutions within the process. A detailed economic estimation for the production of crystalline fructose sugar is presented. The study reveals the significant potential of FO as an economical process for concentration of sugar solutions using brine as the draw solution. (C) 2016 Wiley Periodicals, Inc.
机译:在该研究中,使用前渗透(Fo)技术合成基于亲水化聚酰胺的薄膜复合膜,用于含水果糖溶液的浓度。通过在水性反应浴中加入过量的M-苯二胺以及少量偶极非质子二甲基亚砜溶剂,然后在有机浴中加入过量的Timesoyl氯化物来制备膜,然后为界面聚合提供较长的时间以最小化果糖损失。评估了操作参数,例如抽取NaCl浓度,交叉流速和温度的效果。使用扫描电子显微镜,傅里叶变换红外光谱和X射线衍射进行膜表征,以研究物理化学性质。开发了一种基于分子建模和计算流体动力学的耦合模型,以研究该过程中两种解决方案的扩散行为和浓度谱。介绍了制备结晶果糖糖的详细经济估计。该研究揭示了FO的显着潜力作为使用盐水作为汲取溶液浓缩糖溶液的经济方法。 (c)2016 Wiley期刊,Inc。

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