Introduction
Bimonthly, started in 1957
Administrator
Shanxi Provincial Education Department
Sponsor
Taiyuan University of Technology
Publisher
Ed. Office of Journal of TYUT
Editor-in-Chief
SUN Hongbin
ISSN: 1007-9432
CN: 14-1220/N
Administrator
Shanxi Provincial Education Department
Sponsor
Taiyuan University of Technology
Publisher
Ed. Office of Journal of TYUT
Editor-in-Chief
SUN Hongbin
ISSN: 1007-9432
CN: 14-1220/N
location: home > paper >
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Synthesis of NaA Zeolite and Regulation of Its Grain Size
DOI:
10.16355/j.cnki.issn1007-9432tyut.2017.05.004
Received:
Accepted:
| Corresponding author | Institute | |
| WANG Xiaodong | Key Laboratory of Coal Science and Technology of Ministry of Education and Shanxi Province, Taiyuan University of Technology |
abstract:
In the absence of template agent, NaA zeolite was prepared by hydrothermal synthesis with Na2SiO3·9H2O、NaAlO2 as silicon source and aluminum source, respectively.The influence of the parameters such as water content, crystallization temperature, crystallization time and aging time on the crystal size and distribution was investigated. The products were characterized by XRD and SEM. The results show that the crystal size decreased initially and then increased with decreasing water content, rising crystallization temperature narrowed the mean particle size of crystal and then crystalline transformations occurred, longer aging time resulted in a narrower particle size distribution, while the particle size obtained in the case of different crystallization time was relatively uniform.The smallest particle was achieved with the size of 0.38μm when the water content was n (H2O) ∶n (Na2O) =70, the crystallization temperature was 90 ℃, the crystallization time was 12 h and the aging time was 3 d.
Keywords:
Zeolite NaA; hydrothermal synthesis; crystal size; crystal size distribution;