脱硅重组装法制备 ZSM-5/MCM-41 复合分子筛 及其催化裂解性能研究 报告人：那金丹 指导老师：王莅 教授 Alkali Treatment CTAB Crystallize

2011 年实验总结目前工作 计划与展望 报告内容

2011 年实验总结 椭圆形孔，直通道 0.51×0.53nm 圆形孔，弯曲通道 0.53×0.56nm ≥1.5nm ZSM-5MCM-41 优点：比表面积大 稳性, 活性好 择形性 缺点：孔径小 阻碍扩散 优点：孔径均一, 可调 缺点：孔壁不定型 稳定性, 酸性差

ZSM-5/MCM-41 制备过程 Alkali Treatment CTAB Crystallize 变量 影响 主要工作： NaOH Concentration Crystallization Time Amount of Silica source Thickness and PSD of MCM-41 shell

Effect of NaOH Concentration Fig.1 (A) Small-angle XRD patterns and (B) wide-angle XRD patterns of the ZSM-5/MCM-41 composite XRD

Effect of NaOH Concentration Sample S total (m 2 /g)S external (m 2 /g)V total (cm 3 /g)V micro (cm 3 /g)d (nm) ZSM ZCM-OH1.0-C ZCM-OH1.5-C ZCM-OH2.0-C Fig. 2 N 2 adsorption-desorption isotherms (A) and pore size distributions (B) of ZSM-5 (a), ZMC-OH1.0-C12 (b), ZMC-OH1.5-C12 (c) and ZMC-OH C12 (d) BET & PSD Table 1 Physicochemical properties of ZSM-5 and

Effect of Crystallization Time Fig.3 (A) N 2 adsorption-desorption isotherms and (B) pore size distributions of a: ZSM-5, b: ZMC-OH1.5-C12, c: ZMC-OH1.5-C24, d: ZMC-OH1.5–C36, e: ZMC-OH1.5–C48, f: ZMC-OH1.5–C60, g: ZMC-OH1.5–C72 SampleS total (m 2 /g)S external (m 2 /g)V total (cm 3 /g)V micro (cm 3 /g)d(nm) ZSM ZCM-OH1.5-C ZCM-OH1.5-C ZCM-OH1.5-C ZCM-OH1.5-C ZCM-OH1.5-C ZCM-OH1.5-C

15 nm 50 nm18nm a b cd Fig.4 TEM images for a: ZSM-5, b: ZMC-OH1.5-C12, c: ZMC-OH1.5-C24, d: ZMC-OH1.5–C48

Catalytic Cracking of n-dodecane Temperature: C Pressure: 4MPa Fig.5 Conversion versus TOS for coatings of ZSM-5, ZSM-5/MCM-41 and desilicated ZSM-5

目前工作：不同模板剂制备 ZSM-5/MCM-41 复合分子筛 Fig. 6 (A) Small-angle XRD patterns and (B) wide-angle XRD patterns of the ZSM-5/MCM-41 composite prepared with different templates

N 2 -adsorption Fig. 7 N 2 adsorption-desorption isotherms (A) and pore size distributions (B) of ZSM-5/MCM-41 samples A B Fig. 8 pore size distributions of ZSM-5 /MCM-41 samples with single template (C) and dual-template (D) D

Sample (Si / Al)S BET (m 2 /g)S exter (m 2 /g) V total (cm 3 /g) V micro (cm 3 /g) d (nm) HF ZSM-5 (54) HZM-C 10 (46.4) HZM-C 12 (49.1) HZM-C 14 (48.0) HZM-C HZM-C 10 &C 16 (46.9) HZM-C 12 &C HZM-C 14 &C BET 数据总结

TEM images of samples C 16 TAB C 10 TABC 12 TAB C 14 TAB C 10 & C16 C 12 & C16

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a b c 50 nm d

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