| MATERIALS FOR ADSORPTION AND SEPARATION |
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| Synthesis and Characterization of NaA Zeolite Membranes on the Inner Side of Hollow Fiber Support by a Dynamic Hydrothermal Process |
| MENG Fanpeng1,2,3, FAN Zhenkun3, WU Qiyang4, ZHANG Jian3, ZHANG Chao3, YANG Zanzhong4, ZHANG Yujun1,2
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1 Key Laboratory for Liquid-Solid Structural Evolution & Processing of Materials of Ministry of Education, Shandong University, Jinan 250061;
2 Key Laboratory of Special Functional Aggregated Materials of Ministry of Education, Shandong University, Jinan 250061;
3 Shandong Guiyuan New Material Co., Ltd, Zibo 255086;
4 School of Materials Science and Engineering, Shandong University of Technology, Zibo 255049 |
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Abstract NaA zeolite membranes coated on the inner surface of hollow fiber support were synthesized directly in dynamic state by in-situ hydrothermal synthesis method. The phase, morphology and alcohol/water separation were characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM) and pervaporization, respectively. The influences of the dynamic state hydrothermal condition on the quality of the as-synthesized membranes were investigated. The results show that NaA zeolite membranes fabricated in the dynamic state hydrothermal condition exhibit an excellent continuity, intersecting twin-crystal structure without obvious ecological gravity deposition crystal. The membranes thickness is about 4 μm. The improvement of rotation speed is beneficial to decrease the difference of temperature and concentration in both sides of carrier wall, and reduce crystallization time. In addition, the as-synthesized membrane exhibit 90% ethanol/water pervaporation performance and technology repeatability at 343 K. The permeation flux and the separation factor of the membranes are over 1.03 kg/(m2·h) and 3 781, respectively.
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Published: 07 May 2018
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2017, Vol. 31 
