Control of Crystal Size of MOR

Huimin Zhan

2013.10.11

The Synthesis of MOR

10 20 30 40 50

MOR

2 θ (degree)

（ a） （ 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

10 20 30 40 50

2θ 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 NH4NO3＊ 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 .

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