Synthesis and characterization of ZIF-69 membranes and separation for CO2/CO mixture
Synthesis and characterization of ZIF-69 membranes and separation for CO2/CO mixture
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DOI：
10.1016/j.memsci.2010.02.023
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发表时间：
2010-05-01
影响因子：
9.5
通讯作者：
Lai, Zhiping
中科院分区：
文献类型：
--
作者：
Liu, Yunyang;Hu, Enping;Lai, Zhiping
通过原位溶剂热法在多孔α-氧化铝基底上成功地合成了连续和c取向的ZIF-69膜。采用XRD、SEM和单气体渗透实验对膜进行了表征。对取自用于膜合成的相同母液的晶体的BET测量得到1138 m2/g的朗缪尔表面积。研究了膜对热和不同溶剂的稳定性。在室温下，通过真空方法，分别使用H-2、CH 4、CO、CO2和SF6，通过ZIF-69膜进行单一气体渗透实验。渗透率的顺序为H-2 > CO 2> CH 4> CO > SF 6。用气相色谱仪（GC）研究了CO_2/CO气体混合物的分离，在室温下，CO_2/CO的选择透过率为3.5 ± 0.1，CO_2渗透率为3.6 ± 0.3 × 10 ~（-8）mol·m ~（-2）·s ~（-1）Pa ~（-1）。(C)2010 Elsevier B. V.保留所有权利。
Continuous and c-oriented ZIF-69 membranes were successfully synthesized on porous alpha-alumina substrates by an in situ solvothermal method. The membranes were characterized by XRD, SEM and single-gas permeation tests. The BET measurements on crystals taken from the same mother liquor that was used for membrane synthesis yield a Langmuir surface area of 1138 m(2)/g. The stability of the membrane towards heat and different solvents were studied. Single-gas permeation experiments through ZIF-69 membranes were carried out by a vacuum method at room temperature using H-2, CH4, CO, CO2 and SF6, respectively. The permeances were in the order of H-2 > CO2 > CH4 > CO > SF6. The separation of CO2/CO gas mixture was investigated by gas chromatograph (GC) and the permselectivity of CO2/CO was 3.5 +/- 0.1 with CO2 permeance of 3.6 +/- 0.3 x 10(-8) mol m(-2) s(-1) Pa-1 at room temperature. (C) 2010 Elsevier B.V. All rights reserved.