三元孔道结构纳米ZSM-5分子筛团聚体的合成

doi:10.11962/1006-4990.2020-0235

Abstract

Abstract:

A series of ZSM-5 zeolite were hydrothermally synthesized by using the double template system of n-butylamine and ZSM-5 crystal seed.The influence of content of seed and n-butylamine,and crystallication process on the physicochemical properties,pore structure and morphology of obtained zeolites were investigated.The obtained zeolites were subjected to X-ray diffraction（XRD）,N₂ adsorption-desorption and scanning electron microscopy（SEM） characterization analysis.The analysis results showed that the obtained material was aggregated nano-sized ZSM-5 zeolite with ternary pore structure,and n-butylamine and seed crystals had a synergistic effect in the synthesis process.Under the synthesis conditions of n（n-butyla-mine）/n（SiO₂）=0.26,seed addition amount of 3%（mass fraction） and crystallization at 120 ℃ for 24 h and then at 170 ℃ for 48 h,the specific surface area and external surface area were 364 m²/g and 59 m²/g,respectively.

Key words: aggregated nano-sized ZSM-5 zeolites, n-butylamine, seed, synergistic effect

CLC Number:

TQ127.2

Li Xiaoguo,Mi Xiaotong,Hou Zhanggui. Synthesis of aggregated nano-sized ZSM-5 zeolite with ternary pore structure[J]. Inorganic Chemicals Industry, 2020, 52(12): 104-108.

Figures/Tables 10

References 11

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样品	n（NBA）/ n（SiO₂）	晶种添加量/%	相对结晶度/%	样品	n（NBA）/ n（SiO₂）	晶种添加量/%	相对结晶度/%
Z-0-0.26	0.26	0	—	Z-3-0.15	0.15	3	122
Z-1-0.26	0.26	1	99	Z-3-0.50	0.50	3	95
Z-3-0.26	0.26	3	100	Z-1	0.26	3	93
Z-5-0.26	0.26	5	98	Z-2	0.26	3	93

样品	S_BET/ （m²·g^-1）	S_micro/ （m²·g^-1）	S_ext/ （m²·g^-1）	V_BET/ （cm³·g^-1）	V_micro/ （cm³·g^-1）	V_ext/ （cm³·g^-1）
Z-0-0.26	290	257	33	0.12	0.10	0.02
Z-1-0.26	306	264	42	0.14	0.10	0.04
Z-3-0.26	319	269	50	0.15	0.10	0.05
Z-5-0.26	324	279	45	0.16	0.11	0.05
Z-1	336	280	56	0.16	0.11	0.05
Z-2	364	304	59	0.17	0.12	0.05

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Inorganic Acid-Base-Salt Committee of CIESC

Synthesis of aggregated nano-sized ZSM-5 zeolite with ternary pore structure

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