采用原位生长法在管状大孔α-Al2O3载体外表面上合成致密连续Silicalite-1沸石膜,利用双氧水和稀硝酸混合液液相氧化-低温煅烧方法脱除Silicalite-1沸石膜的模板剂,并用扫描电镜(SEM)、气体渗透测试,渗透蒸发(PV)等表征手段对沸石膜的性能进行评价.结果表明所制备的Silicalite-1膜表面晶粒交互生长,致密,连续,膜的厚度约为10 μm.在293K,0.1 MPa压差条件下,N2的渗透速率为8.16×10-7mol/(m2·s·Pa),N2/i-C4H10理想分离系数为达到425.在428 K下,CO2/N2的理想分离系数为2.89.在333 K下,渗透蒸发分离5%乙醇/水混合液,乙醇/水的分离系数αA/W达到40.3,通量J为0.83 kg/(m2·h).
参考文献
| [1] | Xianshe Feng;Robert Y.M.Huang .Liquid separation by membrane pervaporation: A review[J].Industrial & Engineering Chemistry Research,1997(4):1048-1066. |
| [2] | Joaquin coronas;Jesus Santamaria .Separations using zeolite membranes[J].Separation and Purification Methods,1999(2):127-177. |
| [3] | Tavolaro A.;Drioli E. .Zeolite membranes [Review][J].Advanced Materials,1999(12):975-996. |
| [4] | Tsuru T .Inorganic porous membrane for liquid phase separation[J].Seperation Purification Methods,2001,30:191-220. |
| [5] | Anne Julbe;David Farrusseng;Christian Guizard .Porous ceramic membranes for catalytic reactors-overview and new ideas[J].Journal of Membrane Science,2001(1):3-20. |
| [6] | Hongliang Chen;Yanshuo Li;Weishen Yang .Preparation of silicalite-1 membrane by solution-filling method and its alcohol extraction properties[J].Journal of Membrane Science,2007(1/2):122-130. |
| [7] | Yoshio Morigami;Masakazu Kondo;Jun Abe;Hidetoshi Kita;Kenichi Okamoto .the first large-scale pervaporation plant using tubular-type module with zeolite NaA membrane[J].Separation and Purification Technology,2001(1):251-260. |
| [8] | Wan Cheong Wong;Louisa Tak Yin Au;Carlos Tellez Ariso;King Lun Yeung .Effects of synthesis parameters on the zeolite membrane growth[J].Journal of Membrane Science,2001(1/2):143-163. |
| [9] | O. Pachtova;M. Kocirik;B. Bernauer;S. Miachon;J.-A. Dalmon .A comparative study of template removal from silicalite-1 crystals in pyrolytic and oxidizing regimes[J].Microporous and Mesoporous Materials,2002(3):285-296. |
| [10] | Geus E R;Bekkum H van .Calcination of large MFItype single crystals 2 crack formation and thermomechanical properties in view of the preparation of zeolite membranes[J].ZEOLITES,1995,15:333-341. |
| [11] | Heng S;Lau PPS;Yeung KL;Djafer M;Schrotter JC .Low-temperature ozone treatment for organic template removal from zeolite membrane[J].Journal of Membrane Science,2004(1/2):69-78. |
| [12] | Teruoki Tago;Yuta Nakasaka;Ayaka Kayoda,Takao Masuda .Preparation of hydrophilic silicalite-1 nanocrystal-layered membranes and their application to separating water from water-acetone solution[J].Microporous and Mesoporous Materials,2008(1/2):176-183. |
| [13] | 徐如人;庞文琴.分子筛与多孔材料化学[M].北京:科学出版社,2004:3. |
| [14] | Wridzer J W Bakker;Leo J P van den Broeke;Freek K et al.Temperature Dependence of One-Component Permeation through a Silicalite-I Membrane[J].AICHE Journal,1997,43:2203-2214. |
| [15] | Masuda T;Otani S;Tsuji T et al.Preparation of hydrophilic and acid-proof silicalite-1 zeolite membrane and its application to selective separation of water from water solutions of concentrated acetic acid by pervaporation[J].Separation and Purification Technology,2003,32:181-189. |
| [16] | Zhao Q Y;Wang J Q;Chu N B et al.Preparation of high-permeance MFI membrane with the modified secondary growth method on the macroporous a-alumina tubular support[J].Journal of Membrane Science,2008,320:303-309. |
| [17] | Manfred Noack;Peter Kolsch;Ronald Schafer;Petra Toussaint;Jurgen Caro .Molecular Sieve Membranes for Industrial Application: Problems, Progress, Solutions[J].Chemical Engineering & Technology: Industrial Chemistry -Plant Equipment -Process Engineering -Biotechnology,2002(3):221-230. |
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