Ionothermal Synthesis of Triclinic SAPO-34 Zeolites

被引:11
作者
Han, Li [1 ,2 ]
Yan, Xinxin [2 ]
Guo, Lulu [2 ]
Duan, Yanan [2 ]
Wang, Zheng [3 ]
Lu, Tianliang [2 ]
Xu, Jun [2 ]
Zhan, Yuzhong [2 ]
Wang, Jianfeng [1 ]
机构
[1] Zhengzhou Univ, Sch Ecol & Environm, Zhengzhou 450001, Peoples R China
[2] Zhengzhou Univ, Sch Chem Engn, Zhengzhou 450001, Peoples R China
[3] Ningxia Univ, Inst Chem & Chem Engn, State Key Lab High Efficiency Utilizat Coal & Gre, Yinchuan 750021, Ningxia, Peoples R China
基金
中国国家自然科学基金;
关键词
ionic liquid; ionothermal synthesis; SAPO-34; molecular sieve; IONIC LIQUIDS; MOLECULAR-SIEVES; TEMPLATE; SOLVENT; MEMBRANE; METHANOL;
D O I
10.3390/catal11050616
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
A triclinic SAPO-34 molecular sieve was synthesized ionothermally. The as-synthesized products were characterized by powder X-ray diffraction (XRD), scanning electron microscope (SEM), nuclear magnetic resonance (NMR), fourier infrared spectrometer (FT-IR) and thermogravimetric (TG) analyses. The formation mechanism of the hierarchical porous triclinic SAPO-34 zeolites and the factors affecting the morphology of the SAPO-34 molecular sieve were investigated. The results show that the formation mechanism of the hierarchical pores is in accordance with Ostwald ripening theory, and the accumulation of grains constitutes the existence of mesopores and macropores. The crystallization temperature, ionic liquid type, and organic amines can effectively change the morphology and crystallinity of the SAPO-34 molecular sieve. The crystallization temperature, ionic liquid and template have great influence on the (111) crystal plane, thus affecting the morphology of the molecular sieve. Moreover, it can be proven through NMR and TG analyses that ionic liquids and organic amines can be used as structure directing agents together.
引用
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页数:13
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