Citation: YANG Na, WANG Hong-ying, LIU Yun-qi, LIU Chen-guang. Study on the transformation rule of different long chain alkane hydroisomerization over Pt/SAPO-11 catalyst[J]. Journal of Fuel Chemistry and Technology, ;2016, 44(1): 91-98. shu

Study on the transformation rule of different long chain alkane hydroisomerization over Pt/SAPO-11 catalyst

State Key Laboratory of Heavy Oil Processing, CNPC Key Laboratory of Catalysis, China University of Petroleum (Huangdong), Qingdao 266580, China

Corresponding author: LIU Yun-qi, Liuyq@upc.edu.cn
Received Date: 28 July 2015
Revised Date: 28 September 2015

Fund Project: The project was supported by National Natural Science Foundation of China 21006128China University of Petroleum (East China) Innovation Project YCX2015025The project was supported by National Natural Science Foundation of China U1162203

Figures(8)

The reaction mechanism of hydroisomerization of n-alkanes, from n-decane to n-tetrodecane, over Pt/SAPO-11 catalyst was studied. Results indicated that the n-alkanes with different carbon atom numbers exhibited higher isomerization selectivity at lower temperatures. The isomerization selectivity of n-alkanes can reach 90% by controlling temperature to keep the conversion rate lower than 85%. The conversion rate of n-alkanes was increased and the selectivity of isomerization was decreased with the increase of carbon atom number and temperature due to the occurrence of cracking reaction. Bifunctional catalyst has a good product shape selective effects. The isomerization products are mainly composed of unilateral chain isomers which have the methyl at the end and the center of the carbon chain. At low conversion rate, the cracking reaction of the long-chain n-alkanes over the Pt/SAPO-11 catalyst was mainly catalytic hydrocracking, the carbon number distribution of the cracking products was uniform. However, at high conversion rate, the reaction was mainly acid catalytic cracking, the carbon number distribution of cracking products was obvious asymmetric distribution.
- hydroisomerization,
- long chain n-alkane,
- SAPO-11,
- isomerization selectivity
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