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多步组装合成介孔二氧化硅担载膜

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Abstract:

采用浸渍法和表面改性多步组装合成技术在商业用多孔氧化铝管上制备介孔二氧化硅担载膜。所制备的介孔二氧化硅膜层的厚度平均为2μm,平均孔径为1.59nm。单一气体的渗透实验表明气体通过介孔二氧化硅膜层符合Knudsen扩散模型,在298K和100kPa的恒定条件下,氦气和氮气的渗透量分别为15.6×10-6mol/(s·m2·Pa)和2.5×10-6mol/(s·m2·Pa)。渗透蒸发实验表明经六甲基二硅氮烷表面改性的二氧化硅膜层在303K和313K下分别对含3%(质量分数,下同)和5%乙醇的水溶液进行乙醇组分的提浓,乙醇的分离系数和渗透通量分别为15.2~18.7和1.09~1.25kg/(m2·h)。

References

[1]  VANE L M.A review of pervaporation for product recovery frombiomass fermentation processes[J].J Chem Technol Biotechnol,2005,80(6):603-629. [2]BOWEN T C,MEIER R G,VANE L M.Stability of MFI zeolite-filled PDMS membranes during pervaporative ethanol recovery from aque-ous mixtures containing acetic acid[J].J Membr Sci,2007,298:117-125. [3]朱智慧,钱锦文.壳聚糖膜在渗透汽化领域的研究进展[J].材料科学与工程学报,2008,26:307-311.ZHU Zhihui,QIAN Jinwen.J Mater Sci Eng(in Chinese),2008,26:307-311. [4]WESSLEIN M,HEINTZ A,LICHTENTHALER R N.Pervaporation of liquid mixtures through poly(vinyl alcohol)(PVA)membranes[J].J Membr Sci,1990,51:169-179. [5]PINA M P,ARRUEBO M,FELIPE M.A semi-continuous method for the synthesis of NaA zeolite membranes on tubular supports[J].J Membr Sci,2004,224:141-150. [6]ALGIERI C,BERNARDO P,GOLEMME G,et al.Permeation proper-ties of a thin silicalite-1(MFI)membrane[J].J Membr Sci,2003,222(1-2):181-190. [7]LI G,KIKUCHI E,MATSUKATA M.A study on the pervaporation of water-acetic acid mixtures through ZSM-5zeolite membranes[J].JMembr Sci,2003,218:185-194. [8]SANO T,HASEGAWA M,EJIRI S.Improvement of the pervaporation performance of silicalite membranes by modification with a silane coupling reagent[J].Microporous Mater,1995,5:179-184. [9]NOMURA M,BIN T,NAKAO S.Selective ethanol extraction from fermentation broth using a silicalite membrane[J].Sep Purif Technol,2002,27(1):59-66. [10]VOS R M,MAIER W F,VERWEIJ H.Hydrophobic silica membranes for gas separation[J].J Membr Sci,1999,158(2):277-288. [11]LEE D,OYAMA S T,Gas permeation characteristics of a hydrogen selective supported silica membrane[J].J Membr Sci,2002,210:291-306. [12]BOFFA V,ELSHOF J E T,BLANK D H A.Preparation of templated mesoporous silica membranes on macroporousα-alumina supports via direct coating of thixotropic polymeric sols[J].Microporous Meso-porous Mater,2007,100:173-182. [13]UHLHORN R J R,BURGGRAAF A J.Gas seperation with inorganic membranes[C]//Inorganic Membranes:Synthesis,Characteristics and Application.BHAVE R R,ed.New York:van Nostrand Reinhold,1991:p.158.

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