Exceptionally stable, mechanically robust, and highly methanol‐selective organosilica membranes, including Bis(triethoxysiyl)acetylene (BTESA), fluorine‐doped bis(triethoxysiyl) methane (F‐BTESM), and Cetyltrimethylammonium chloride‐etched bis(trimethoxysiyl)hexane (CTAC‐BTMSH), were prepared and utilized for organic solvent reverse osmosis (OSRO) separations. The BTESA membrane showed optimal separation performance regarding methanol/toluene and possessed the highest levels of both permeation flux and rejection. Continuous measurements were performed to highlight the molecule size/shape discrimination of BTESA membranes using compounds such as methanol/methyl acetate, methanol/dimethyl carbonate (DMC) and methanol/methyl tert‐butyl ether (MTBE). Also, a generalized solution‐diffusion model was successful in predicting the permeation behaviors through organosilica membranes when used in an OSRO modality, and proved to be capable of accurate predictions on pressure‐dependent permeation flux and rejection for a wide range of feed concentrations (0–55 wt%) and pressures (2–14 MPa). This study lends important insight for the development of organosilica membranes and process design for the energy‐efficient OSRO separation of organic liquids.

中文翻译：

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通过有机硅膜进行有机溶剂反渗透分离的实验研究和建模

异常稳定，机械坚固且具有高甲醇选择性的有机硅膜，包括双（三乙氧基甲硅烷基）乙炔（BTESA），氟掺杂的双（三乙氧基甲硅烷基）甲烷（F-BTESM）和十六烷基三甲基氯化铵蚀刻的双（三甲氧基甲硅烷基）己烷（CTAC） ‐BTMSH），并用于有机溶剂反渗透（OSRO）分离。BTESA膜对甲醇/甲苯表现出最佳的分离性能，并具有最高的通量和截留率。使用甲醇/乙酸甲酯，甲醇/碳酸二甲酯（DMC）和甲醇/甲基叔丁基醚（MTBE）等化合物进行连续测量以突出BTESA膜的分子大小/形状区别。也，通用的溶液扩散模型成功地预测了OSRO装置中通过有机硅膜的渗透行为，并被证明能够准确预测各种进料浓度下压力依赖性渗透通量和截留率（0-55 wt％）和压力（2-14 MPa）。这项研究为有机硅膜的开发和用于有机液体的高效OSRO分离的工艺设计提供了重要的见识。