Control of Crystal Size of MOR Huimin Zhan 2013.10.11.

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Presentation transcript:

Control of Crystal Size of MOR Huimin Zhan

The Synthesis of MOR MOR 2 θ (degree) （a）（a）（b）（b）注：丝光沸石的 SEM 图：（ a ）全景图（ b ） a 图中小颗粒的放大图

Quenching in the course of crystallization process θ degree 未急冷 3h 急冷 6h 急冷 9h 急冷 12h 急冷 24h 急冷 48h 急冷

(3h 急冷 ) （ 6h 急冷）（ 9h 急冷）（ 24h 急冷）（ 48h 急冷）

B. Lu et al. / Microporous and Mesoporous Materials 95 (2006) 141–145 Fig. 1. SEM images of MORs obtained by quenching in the course of crystallization. (a) 0, (b) 6h, (c) 24h, (d) 36h

Work Plan 1 、 To synthesize MOR with uniform crystal size ＊ To change the type of seed crystal B. Lu et al. / Microporous and Mesoporous Materials 76 (2004) 1–7 Fig. 2. SEM images of seed crystal B after alkaline treatment. Fig. 1. SEM images of high-silica MOR zeolites synthesized with seed crystals B. The low dissolubility of seed crystals synthesized with NaF may be caused by the fewer structural defects.

1 、 To synthesize MOR with uniform crystal size ＊ To change the amount of seed crystal The amount of seed crystals depends upon the Si/Al ratio of starting gel. ＊ The effect of NH 4 NO 3 ＊ The effect of pressure ＊ The effect of aging time 2 、 To control Si/Al of MOR ＊ The order of addition of material The zeolite formed is much richer in aluminum than the synthesis gel.

Thanks for Your Attention! Q s & A s