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- Title
Optimization of crystal growth of hierarchical porosity ZSM-5 zeolite based on coal fly ash "waste utilization".
- Authors
Qian, Y.; Zhang, H.; Li, L.; Duan, Y.
- Abstract
In this study, ZSM-5 zeolite with hierarchical porosity structure was synthesized by hydrothermal method using Al(OH)3, SiO2 extracted from coal fly ash as aluminum source and silicon source. The optimal synthesis parameters of ZSM-5 zeolite were determined via an orthogonal analysis table. The optimum synthesis conditions were: SiO2/Al2O3/Na2O/hexadecyltrimethylammonium bromide/tetrapropyl ammonium bromide/H2O =1/0.08/0.25/0.05/0.17/50, and the optimum crystallization temperature and crystallization time were 160°C and 48 h, respectively. Scanning electron microscopy showed that the synthesized ZSM-5 zeolite exhibited a spherical shape. Nitrogen adsorption-desorption and Brunauer-Emmett- Teller measurement analysis displayed that the best sample ZSM-5 molecular sieve showed a typical type IV isotherm, and the micropores and mesopores coexisted in the sample, indicating the successful preparation of ZSM-5 zeolite with hierarchical porosity structure. The crystal growth of ZSM-5 under different hydrothermal conditions follows the "S" adjustment.
- Subjects
FLY ash; COAL ash; WASTE recycling; ZEOLITES; CRYSTAL growth; INCINERATION
- Publication
Materialwissenschaft und Werkstoffechnik, 2020, Vol 51, Issue 9, p1295
- ISSN
0933-5137
- Publication type
Article
- DOI
10.1002/mawe.201900217