Single Gas Permeance Performance of High Silica SSZ-13 Zeolite Membranes

Liang, Li; Zhu, Meihua; Chen, Le; Zhong, Caijun; Yang, Yunjie; Wu, Ting; Wang, Heli; Kumakiri, Izumi; Chen, Xiangshu; Kita, Hidetoshi

doi:10.3390/membranes8030043

Cited by 20 publications

(17 citation statements)

References 31 publications

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“…High silica SSZ-13 zeolite membranes were prepared as reported in our previous work. 37 The precursor synthesis gel composition of the membranes was 1000 SiO 2 /100 Na 2 O/5Al 2 O 3 /100 TMAdaOH/80000 H 2 O, and the Si/Al ratio of the as-prepared membrane was 79. In this work, the as-synthesized SSZ-13 zeolite membranes were post-treated by inorganic acid, including H 2 SO 4 (Xinguang, 95%−98%), HCl (Xinguang, 36%−38%), HNO 3 (Aike, 1.51 g/cm 3 ) and H 3 PO 4 (Fuchen, 85%).…”

Section: Methodsmentioning

confidence: 99%

Influences of Acid Post-Treatment on High Silica SSZ-13 Zeolite Membrane

Zhu

Liang

Liu

et al. 2019

Ind. Eng. Chem. Res.

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Single gas permeance performance of the high silica SSZ-13 zeolite membrane (Si/Al = 79) was greatly improved by acid post-treatment in this work. Effects of post-treatment conditions, such as post-treatment temperature (25, 60, 80, and 100 °C) and time (0–2 h), acid concentration (0–0.6 H+ mol/L), and acid type (HCl, HNO3, H2SO4, and H3PO4), on the single gas permeance performance of the membrane were investigated in this study. Morphology and structure of the acid post-treated membrane is identical with the fresh high silica SSZ-13 zeolites by advance characterization results, only the amorphous on the zeolites surface is removed and filled into the intercrystalline by medium acid post-treatment, which could improve the gas permeance performance of the membranes greatly. When the post-treatment temperature, time, acid type, and H+ concentration are 25 °C, 0.5 h, H2SO4, and 0.4 mol/L, the CO2/CH4, CO2/N2, H2/CH4, and H2/SF6 ideal selectivity of the post-treated high silica SSZ-13 zeolite membrane are increased to 68, 10, 29, and 126 at 0.2 MPa and 25 °C, respectively.

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Section: Methodsmentioning

confidence: 99%

Influences of Acid Post-Treatment on High Silica SSZ-13 Zeolite Membrane

Zhu

Liang

Liu

et al. 2019

Ind. Eng. Chem. Res.

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“…二次生长法是预先在载体表面涂敷晶种并作为生长中心继续生长成膜的一种合成方法 [20] (图 2), 该方法可缩短合成时间, 提高合成效率, 而且能更好地控制膜层厚度和晶体微观结构。此外, 晶种在载体表面的修饰作用还可减少载体对成膜过程的影响, 避免缺陷的产生。目前国内外从事 CHA 分子筛膜合成研究的主要团队, 基本采用二次生长法, 其中包括最初合成 CHA 分子筛膜的科罗拉多大学的 Falconer 和 Noble 等 [5,[21][22][23] 。针对 SSZ-13 膜的二次生长法合成, 国外课题组例如 Kosinov 和 Choi 等 [14,[24][25][26] 成功合成出薄而均匀且分离性能良好的高硅 SSZ-13 膜; 国内的顾学红、周荣飞、陈祥树等 [27][28][29][30][31][32][33][34]…”

Section: 二次生长法unclassified

Synthesis and Gas Separation of Chabazite Zeolite Membranes

Li¹,

Zhang²,

Zou³

et al. 2021

Journal of Inorganic Materials

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Chabazite (CHA) zeolite membranes exhibit superior performances in light gas separations owing to the eight-membered ring channel structure with small pore size (0.38 nm), adjustable surface characteristics, and high material stability and preparation reproducibility, and have gradually become one of the hot spots of zeolite membrane research in recent years. This review article first introduces the basic characteristics, the two typical CHA zeolite membranes (SAPO-34 and SSZ-13 membranes), then compares the synthesis and preparation methods of CHA zeolite membranes (in-situ synthesis, secondary growth synthesis, microwave heating methods) and analyzes their advantages and disadvantages in application status. The influences of their key synthesis conditions of the secondary growth as themainstream synthesis method on the qualities of SSZ-13 and SAPO-34 membranes have been elaborated in detail, mainly including 1) the seeding conditions, such as carrier type, seeding crystal and seeding approach; 2) the hydrothermal synthesis conditions, such as crystallization time and temperature, water content, silica-to-alumina ratio, structure directing agent, and cation type; 3) the calcination approaches, such as conventional calcination, staged calcination, and rapid heating treatments. After comparative analysis, the preferred synthesis of the above two typical CHA zeolite membranes are proposed. Furthermore, the modulation of membrane surface chemistry is discussed for the enhancement in gas separation, such as silica-to-alumina ratio adjustment, ion exchange, heteroatom substitution, amino-group functionalization, and surface modification. The detailed characteristics of gas separation in various gas mixture systems and the permeation properties of different single gases on CHA zeolite membranes are analyzed and summarized as well. Finally, the future development of CHA zeolite membranes is prospected.

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“…The membrane also displayed extremely high CO 2 -CH 4 separation performance. Nevertheless, continuous and high silica SSZ-13 zeolite membranes were prepared on porous mullite supports from high SiO 2 /Al 2 O 3 ratio or aluminum-free precursor synthesis gel [35]. From the research, it was found that single gas permeance (CO 2 and CH 4 ) of the high silica SSZ-13 zeolite membrane decreased with the SiO 2 /Al 2 O 3 ratio in the precursor synthesis gel, while the ideal CO 2 /CH 4 selectivity of the membrane was gradually increased.…”

Section: Gas Separationsmentioning

confidence: 99%