以四乙基氢氧化铵(TEAOH)为模板剂,采用二次生长法在α-Al_2O_3多孔陶瓷管上合成了SAPO-34沸石膜.利用X射线衍射(XRD)、扫描电镜(SEM)以及气体渗透对合成的膜进行了表征.XRD结果表明合成的膜具有典型的CHA型沸石特征峰,无其它杂相存在.SEM显示膜厚大约为5 μm,膜表面晶粒交织共生完好,且连续、致密,没有发现明显的针孔和裂纹.室温下, 当膜两侧压降为0.1 MPa时,CO_2/CH_4的理想选择性和混合气体分离选择性分别为7和40.
SAPO-34 zeolite membranes were synthesized on porous α-Al_2O_3 tubular support by secondary growth method using TEAOH as template. The membranes were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM) and gas permeation tests. XRD patterns showed that the as-synthesized membranes had typical CHA-type zeolite XRD patterns, and no other phase presented. SEM analysis revealed that a thin and compact SAPO-34 layer was formed on α-Al_2O_3 tubular support, the crystals showed well intergrowth, and no pinholes and cracks were observed. At room temperature, with a pressure drop of 0.1 MPa, the ideal and separation selectivity of a SAPO-34 zeolite membrane were 7 and 40, respectively.
参考文献
| [1] | McLeary, EE;Jansen, JC;Kapteijn, F .Zeolite based films, membranes and membrane reactors: Progress and prospects[J].Microporous and Mesoporous Materials,2006(1/3):198-220. |
| [2] | Nathan W.Ockwig;Tina M.Nenoff .Membranes for Hydrogen Separation[J].Chemical Reviews,2007(10):4078-4110. |
| [3] | G.Q.Lu;J.C.Diniz da Costa;M.Duke .Inorganic membranes for hydrogen production and purification: A critical review and perspective[J].Journal of Colloid and Interface Science,2007(2):589-603. |
| [4] | 李永生,王金渠,施剑林,陈连璋,郭树才,严东生.变温晶化合成高渗透率ZSM-5沸石膜[J].高等学校化学学报,2002(10):1857-1859. |
| [5] | 王金渠,李邦民,刘建亮,鲁金明,鲍仲瑛,缪长喜.ZSM-5 型沸石膜反应器在乙苯脱氢反应中的模式[J].化工学报,2006(08):1923-1926. |
| [6] | J. Caro;M. Noack;P. Kolsch;R. Schafer .Zeolite membranes - state of their development and perspective[J].Microporous and Mesoporous Materials,2000(1):3-24. |
| [7] | Tavolaro A.;Drioli E. .Zeolite membranes [Review][J].Advanced Materials,1999(12):975-996. |
| [8] | 徐晓春;杨维慎;刘杰 等.管状Silicate-1分子筛膜的乙醇/水渗透汽化分离性能[J].膜科学与技术,1999,19(04):39-43. |
| [9] | 王季平,刘丽娟,邵国林,刘昶,王金渠.二次生长法FAU型沸石膜的合成与表征[J].膜科学与技术,2007(06):9-12. |
| [10] | C. Algieri;P. Bernardo;G. Barbieri .A novel seeding procedure for preparing tubular NaY zeolite membranes[J].Microporous and Mesoporous Materials,2009(1/3):129-136. |
| [11] | Wenhui Yuan;Y. S. Lin;Weishen Yang .Molecular Sieving MFI-Type Zeolite Membranes for Pervaporation Separation of Xylene Isomers[J].Journal of the American Chemical Society,2004(15):4776-4777. |
| [12] | Maria Pilar Bernal;George Xomeritakis;Michael Tsapatsis .Tubular MFI zeolite membranes made by secondary (seeded) growth[J].Catalysis Today,2001(1/3):101-107. |
| [13] | Lok B M;Messina C A;Patton R L et al.Crystalline silicoaluminophosphates[P].US:US4440871,1984-04-03. |
| [14] | Stephen Wilson;Paul Barger .The characteristics of SAPO-34 which influence the conversion of methanol to light olefins[J].Microporous and Mesoporous Materials,1999(1/2):117-126. |
| [15] | Juan Tan;Zhongmin Liu;Xinhe Bao;Xianchun Liu;Xiuwen Han;Changing He;Runsheng Zhai .Crystallization and Si incorporation mechanisms of SAPO-34[J].Microporous and Mesoporous Materials,2002(1/3):97-108. |
| [16] | Joseph C. Poshusta;Vu A. Tuan;John L. Falconer;Richard D. Noble .Synthesis and Permeation Properties of SAPO-34 Tubular Membranes[J].Industrial & Engineering Chemistry Research,1998(10):3924-3929. |
| [17] | Joseph C.Poshusta;Vu A.Tuan;Richard D.Noble;John L.Falconer .Separation of Light Gas Mixtures Using SAPO-34 Membranes[J].AIChE Journal,2000(4):779-789. |
| [18] | Li SG;Falconer JL;Noble RD .SAPO-34 membranes for CO2/CH4 separation[J].Journal of Membrane Science,2004(1):121-135. |
| [19] | Shiguang Li;John L. Falconer;Richard D. Noble .Improved SAPO-34 Membranes for CO_2/CH_4 Separations[J].Advanced Materials,2006(19):2601-2603. |
| [20] | Li SG;Alvarado G;Noble RD;Falconer JL .Effects of impurities on CO2/CH4 separations through SAPO-34 membranes[J].Journal of Membrane Science,2005(1/2):59-66. |
| [21] | Hong M;Li SG;Falconer JL;Noble RD .Hydrogen purification using a SAPO-34 membrane[J].Journal of Membrane Science,2008(2):277-283. |
| [22] | 孔春龙,王金渠,鲁金明,陶凯.纳米晶种涂层法合成Silicalite-1沸石膜[J].过程工程学报,2007(01):71-74. |
| [23] | Mertens M M;Engels B .Synthesis of silicoaluminophosphates[P].US:7014827,2006-3-21. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%