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Citation: Zheng Jian, Chun Yuan, Dong Jia-Lu, Xu Qin-Hua. Effect of Chemical Vapour Deposition on Pt/KL Catalyst for the Aromatization of n-Hexane[J]. Acta Physico-Chimica Sinica, ;1996, 12(10): 939-942. doi: 10.3866/PKU.WHXB19961017 shu

Effect of Chemical Vapour Deposition on Pt/KL Catalyst for the Aromatization of n-Hexane

1.
Department of Chemsitry,Nanjing University,Nanjing 210093

Received Date: 20 November 1995
Available Online: 15 October 1996

Modification of KL zeolite by chemical vapour deposition (CVD) of Si(OEt)4 and (CH3)3SiOSi(CH3)3 was used to study the influence of zeoltie support on the aromatization of n-hexane over Pt/KL catalyst. The pore size and pore volume of zeolite were decreased by CVD. The acidic hydroxyl groups remaining on the surface of KL zeolite were removed and thus the selectivity of non-acidic catalyzed aromatization reaction was improved. Whereas the activity of aromatiztion reaction was decreased due to the destruction of some of active sites in KL zeolite for 1,6-cyclization. Becuase of the coverage of the framework of zeolite by CVD of SiO2, Pt particles became more electron-excess. Therefore, the silica-coated catalysts were easier to be poisoned by sulphur.
- Chemical vapour deposition,
- KL zeolite,
- Pt supported,
- Armoatization of n-hexane,
- Sulphur poisoning
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