Novel Perfluorinated Polymer-Based Pervaporation Membranes for Separation of Solvent/Water Mixtures.
Novel Perfluorinated Polymer-Based Pervaporation Membranes for Separation of Solvent/Water Mixtures.
复制标题
DOI：
10.1016/j.memsci.2010.01.058
复制
发表时间：
2010-04-15
影响因子：
9.5
通讯作者：
Bhattacharyya, D.
中科院分区：
文献类型：
--
作者：
Smuleac, V.;Wu, J.;Nemser, S.;Majumdar, S.;Bhattacharyya, D.
传统上，其中溶剂是主要组分的水-溶剂混合物的渗透蒸发使用亲水性膜（例如PVA或沸石）进行。本文研究了一种新型的渗透汽化膜（非晶态全氟聚合物，疏水）用于水-溶剂混合物的分离。该膜具有高的自由体积，对所有溶剂都是惰性的，并且具有显著的机械、化学和热稳定性。水通过溶液扩散模型传输，溶剂的分离主要基于分子筛（尺寸排阻）原理。该膜在宽的进料浓度范围内显示出高的操作稳定性而不溶胀;操作温度对膜分离性能没有显著影响。在22 °C下，对于水-乙醇和水-IPA混合物（2- 98%wt水-溶剂），分离因子分别高达349和500，并且通量分别为0.15和0.05 kg/m2 h。还计算了基于渗透率的选择性，并且对于宽范围的进料浓度，选择性近似恒定。对更复杂的水-乙醇-乙酸乙酯（三元）混合物的渗透蒸发表明，该体系可以成功地应用于基于尺寸排阻的溶质分离。
Traditionally, the pervaporation of water-solvent mixtures where the solvent is the major component is performed using hydrophilic membranes (such as PVA or zeolites). In the present paper a new type of pervaporation membrane (amorphous perfluorinated polymer, hydrophobic) was studied for separation of water-solvent mixtures. This membrane has high free volume and is inert for all solvents, and has a remarkable mechanical, chemical and thermal stability. The water is transported by solution diffusion model and the separation of solvent is primarily based on molecular sieving (size exclusion) principles. The membrane shows a high stability for operation over a broad range of feed concentrations without swelling; the operating temperature does not have a significant effect on membrane separation performance. Separation factors as high as 349 and 500 for water-ethanol and water-IPA mixtures (2-98 % wt water-solvent) and fluxes of 0.15 and 0.05 kg/m2h, respectively were obtained at 22 °C. The permeance-based selectivities were also calculated, and the selectivity is approximately constant for a wide range of feed concentrations. The pervaporation of more complex (ternary) mixtures of water-ethanol-ethyl acetate showed that this system could be successfully applied for solute separation based on size exclusion.
登录
查看更多内容
影响因子：
4.2
作者：
Kariduraganavar, Mahadevappa Y.;Varghese, Jolly G.;Olley, Robert H.
通讯作者：
Olley, Robert H.
影响因子：
9.5
作者：
Peters, TA;Poeth, CHS;Keurentjes, JTF
通讯作者：
Keurentjes, JTF
影响因子：
9.5
作者：
Polyakov, AM;Starannikova, LE;Yampolskii, YP
通讯作者：
Yampolskii, YP
影响因子：
9.5
作者：
Okumus, E;Gürkan, T;Yilmaz, L
通讯作者：
Yilmaz, L
影响因子：
8.6
作者：
Bhat, SD;Naidu, BVK;Aminabhavi, TM
通讯作者：
Aminabhavi, TM