| Autor: |
Jin Dan Na, Mei Ling Ji, Shen Lin Hu, Xue Song Ma, Li Wang, Guozhu Liu |
| Rok vydání: |
2012 |
| Předmět: |
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| Zdroj: |
Advanced Materials Research. 528:267-271 |
| ISSN: |
1662-8985 |
| Popis: |
A set of ZSM-5/MCM-41 composite zeolite were synthesized hydrothermally with CTAB as a template and ZSM-5 zeolite as a silica source. XRD patterns of ZSM-5/MCM-41 zeolites contain the characteristic peaks both of ZSM-5 and MCM-41. TEM images show that ZSM-5 zeolite surface was covered with a MCM-41 thin layer varying the thickness with the crystallization time. The BET specific surface area of the composite zeolite increased with increasing the NaOH concentration up to a maximum at 1.5 M, followed by decreased as the NaOH concentration was increased. Catalytic tests were carried out in a tubular reactor coated with the zeolite on its inner wall at 550°C and 4 MPa. The ZSM-5/MCM-41 zeolite with a core-shell structure exhibited a higher conversion of supercritical n-dodecane cracking compared to ZSM-5. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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