Journal of the Chinese Ceramic Society, Volume. 49, Issue 12, 2659(2021)
Synthesis and Characteristics of Zsm-22 Zeolite by Like-solid-phase Method
The ZSM-22 zeolite was synthesized by like solid-phase method with solid silicon as a silicon source. The effects of silicon source type, seed, alkali/silica ratio, crystallization temperature/time and stirring rotational speed in the crystallization on the synthesis performance were investigated. The result indicate that the ZSM-22 zeolite with a high crystallinity can be prepared under the optimum conditions (i.e., n(KOH):n(Al2O3):n(SiO2):n(H2O):n(DAH):n(seed) of (0.150-0.180):0.012 5.000:1.000:(5.100-7.900):0.300:0.068, crystallization temperature of 443 K, crystallization time of 16 h and stirring rotational speed of 20 r/min). Compared to the conventional hydrothermal method, the like-solid-phase method can reduce the crystallization time and increase the solid content of feeds and product yield. The zeolites synthesized by hydrothermal and like-solid-phase method were characterized by X-ray diffraction, specific surface area measurement, pyrolysis infrared spectrometry and scanning electron microscopy,respectively, showingthat they have differences in the acidity distribution and pore structure.
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LI Mengchen, GAO Shanbin, YU Hongyue, SHEN Yuge, BO Yawen, CHI Kebin. Synthesis and Characteristics of Zsm-22 Zeolite by Like-solid-phase Method[J]. Journal of the Chinese Ceramic Society, 2021, 49(12): 2659
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Received: Jan. 26, 2021
Accepted: --
Published Online: Feb. 11, 2022
The Author Email: Mengchen LI (limengchen@petrochina.com.cn)
CSTR:32186.14.