Chem. J. Chinese Universities ›› 2020, Vol. 41 ›› Issue (4): 616.doi: 10.7503/cjcu20200083

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Synthesis of Hierarchical NaX Zeolite and Its CO2 Adsorption Performance

WANG Yuyao1,ZHANG Qiang1,YU Jihong1,2,*()   

  1. 1. State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry
    2. International Center of Future Science, Jilin University, Changchun 130012, China
  • Received:2020-02-19 Online:2020-04-10 Published:2020-03-06
  • Contact: Jihong YU E-mail:jihong@jlu.edu.cn
  • Supported by:
    † Supported by the National Natural Science Foundation of China(21621001)

Abstract:

High-quality hierarchical NaX zeolites with high product yield and high crystallinity were prepared by synergistically using a two-step crystallization process and L-lysine-assisted approach. XRD, SEM, TEM, XRF and N2 adsorption-desorption tests are used to investigate the influence of L-lysine and crystallization steps on the mesoporosity, crystallinity, and the yield of NaX zeolites. In this synthetic strategy, two-step crystallization favors the generation of mesopores; and L-lysine plays an important role in improving the zeolite crystallinity as well as the product yield. Owing to the high-quality hierarchical zeolite crystals, the as-prepared NaX zeolite exhibits excellent performance in CO2 adsorption with CO2 uptake of 154.2 cm 3/g at 273 K and 100 kPa. This green and facile synthetic strategy opens a new way to fabricate high-quality hierarchical NaX zeolites, promising their practical applications in CO2 adsorption.

Key words: NaX zeolite, Hierarchical structure, Two-step crystallization, L-lysine, CO2 adsorption

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