Ru particle size effect in Ru/CNT-catalyzed Fischer-Tropsch synthesis

能源化学(英文) ›› 2013, Vol. 22 ›› Issue (2): 321-328.

Ru particle size effect in Ru/CNT-catalyzed Fischer-Tropsch synthesis

Jincan Kang, Weiping Deng, Qinghong Zhang, Ye Wang

State Key Laboratory of Physical Chemistry of Solid Surfaces, National Engineering Laboratory for Green Chemical Productions of Alcohols, Ethers and Esters, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, Fujian, China

收稿日期:2012-11-12 修回日期:2012-12-25 出版日期:2013-03-20 发布日期:2013-04-04
通讯作者: Ye Wang
基金资助:
This work was supported by the National Basic Research Program of China (No. 2013CB933100), the National Natural Science Foundation of China (21173174, 21161130522, 21033006 and 20923004), the Program for Changjiang Scholars and Innovative Research Team in University (No. IRT1036), and the Research Fund for the Doctoral Program of Higher Education (No. 20090121110007).

Ru particle size effect in Ru/CNT-catalyzed Fischer-Tropsch synthesis

Jincan Kang, Weiping Deng, Qinghong Zhang, Ye Wang

State Key Laboratory of Physical Chemistry of Solid Surfaces, National Engineering Laboratory for Green Chemical Productions of Alcohols, Ethers and Esters, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, Fujian, China

Received:2012-11-12 Revised:2012-12-25 Online:2013-03-20 Published:2013-04-04
Supported by:
This work was supported by the National Basic Research Program of China (No. 2013CB933100), the National Natural Science Foundation of China (21173174, 21161130522, 21033006 and 20923004), the Program for Changjiang Scholars and Innovative Research Team in University (No. IRT1036), and the Research Fund for the Doctoral Program of Higher Education (No. 20090121110007).

摘要/Abstract

摘要： Carbon nanotube (CNT)-supported Ru nanoparticles with mean sizes ranging from 2.3 to 9.2 nm were prepared by different post-treatments and studied for Fischer-Tropsch (FT) synthesis. The effects of Ru particle size on catalytic behaviors were investigated at both shorter and longer contact times. At shorter contact time, where the secondary reactions were insignificant, the turnover frequency (TOF) for CO conversion was dependent on the mean size of Ru particles; TOF increased with the mean size of Ru particles from 2.3 to 6.3 nm and then decreased slightly. At the same time, the selectivities to C₅₊ hydrocarbons increased gradually with the mean size of Ru particles up to 6.3 nm and then kept almost unchanged with a further increase in Ru particle size. At longer contact time, C₁₀-C₂₀ selectivity increased significantly at the expense of C₂₁₊ selectivity, suggesting the occurrence of the selective hydrocracking of C₂₁₊ to C₁₀-C₂₀ hydrocarbons.

关键词: Fischer-Tropsch synthesis, carbon nanotube, Ru nanoparticle, size effect, selectivity control

Abstract: Carbon nanotube (CNT)-supported Ru nanoparticles with mean sizes ranging from 2.3 to 9.2 nm were prepared by different post-treatments and studied for Fischer-Tropsch (FT) synthesis. The effects of Ru particle size on catalytic behaviors were investigated at both shorter and longer contact times. At shorter contact time, where the secondary reactions were insignificant, the turnover frequency (TOF) for CO conversion was dependent on the mean size of Ru particles; TOF increased with the mean size of Ru particles from 2.3 to 6.3 nm and then decreased slightly. At the same time, the selectivities to C₅₊ hydrocarbons increased gradually with the mean size of Ru particles up to 6.3 nm and then kept almost unchanged with a further increase in Ru particle size. At longer contact time, C₁₀-C₂₀ selectivity increased significantly at the expense of C₂₁₊ selectivity, suggesting the occurrence of the selective hydrocracking of C₂₁₊ to C₁₀-C₂₀ hydrocarbons.

Key words: Fischer-Tropsch synthesis, carbon nanotube, Ru nanoparticle, size effect, selectivity control

Jincan Kang, Weiping Deng, Qinghong Zhang, Ye Wang. Ru particle size effect in Ru/CNT-catalyzed Fischer-Tropsch synthesis[J]. 能源化学(英文), 2013, 22(2): 321-328.

Jincan Kang, Weiping Deng, Qinghong Zhang, Ye Wang. Ru particle size effect in Ru/CNT-catalyzed Fischer-Tropsch synthesis[J]. Journal of Energy Chemistry, 2013, 22(2): 321-328.

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Ru particle size effect in Ru/CNT-catalyzed Fischer-Tropsch synthesis

Ru particle size effect in Ru/CNT-catalyzed Fischer-Tropsch synthesis

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