Chinese Journal of Chemical Engineering ›› 2021, Vol. 29 ›› Issue (1): 154-159.doi: 10.1016/j.cjche.2020.09.005

• Separation Science and Engineering • Previous Articles     Next Articles

Growth process and short chain alcohol separation performance of fluoride-containing NaY zeolite membrane

Xiaopan Chen1, Meihua Zhu1, Sitong Xiang1, Tian Gui1, Ting Wu1, Yuqin Li1, Na Hu1, Izumi Kumakiri2, Xiangshu Chen1,2, Hidetoshi Kita2   

  1. 1 State-Province Joint Engineering Laboratory of Zeolite Membrane Materials, Institute of Advanced Materials, College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, China;
    2 Graduate School of Science and Technology for Innovation, Graduate School Science and Engineering, Yamaguchi University, Ube 755-8611, Japan
  • Received:2020-03-13 Revised:2020-08-26 Online:2021-01-28 Published:2021-04-02
  • Contact: Meihua Zhu
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (Grant No. 21868012 and 21968009), Jiangxi Provincial Department of Science and Technology (20171BCB24005, 20181ACH80003, 20192ACB80003 and 20192BBH80024).

Abstract: Growth process of the NaY zeolite membranes was investigated by fluoride-containing precursor synthesis gel. Compared with the fluoride-free precursor synthesis gel, the irregular NaY zeolite crystals were dissolved into amorphous by the fluoride-containing precursor synthesis gel initially, the amorphous contained the Y-type zeolite characteristic bands by the IR characterization. The fine square NaY zeolite crystals arose from the amorphous, which were accumulated and gradually grew into a dense NaY zeolite layer on the support surface after 6.5 h. Because the excessive NaY zeolites were dissolved by the strong alkaline and fluoride-containing precursor synthesis gel, there was plenty of amorphous on NaY zeolites layer for prolonging the crystallization time. The as-synthesized NaY zeolite membranes had a good separation performance and repeatability for separation of 10 wt% methanol (MeOH)/methyl methacrylate (MMA) mixture by pervaporation, the flux and separation factor were (1.27 ± 0.07) kg·m-2·h-1 and (4900 ± 1500) at 323 K, respectively. Besides, the NaY zeolite membranes were applied to separate the other short chain alcohol from the various alcohol/organic ester and alcohol/organic ether mixtures, the NaY zeolite membranes showed high short chain alcohol perm-selectivity.

Key words: NaY zeolite membrane, Growth process, Fluoride-containing, Short chain alcohols, Pervaporation