کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
76539 | 49142 | 2007 | 7 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: New synthesis technique of supported ZSM-5 using organo-alumino-silicic gels New synthesis technique of supported ZSM-5 using organo-alumino-silicic gels](/preview/png/76539.png)
This contribution deals with the synthesis of a silicon-rich ZSM-5 obtained from an amorphous organo-alumino-silicic gel. The gel was formed by reacting a mechanical mixture of RHA (rice hull ash), silica’s source, and of natural clinoptilolite, source of alumina, with glycerol during 2 h at 200 °C. After a maturation period of one day at 60 °C, the reaction product was hydrolyzed by a tetra-propyl-ammonium (TPA) solution and then aged for two days at 135 °C in a stainless steel autoclave. After washing and drying, the X-ray pattern showed a well crystallized ZSM-5. The textural analysis of the slowly calcined solid at 500 °C for 4 h, and the SEM micrographies evidence that the zeolite was supported on mesoporous silica. The proportion of both components depends on the tunable hydrolysis conditions.
Journal: Microporous and Mesoporous Materials - Volume 100, Issues 1–3, 23 March 2007, Pages 70–76