Catalytic properties of Ru nanoparticles embedded on ordered mesoporous carbon with different pore size in Fischer-Tropsch synthesis

能源化学(英文) ›› 2013, Vol. 22 ›› Issue (4): 560-566.

Catalytic properties of Ru nanoparticles embedded on ordered mesoporous carbon with different pore size in Fischer-Tropsch synthesis

Kun Xiong^a,d, Yuhua Zhang^a,b, Jinlin Li^a, Kongyong Liew^a,c

a. Key Laboratory of Catalysis and Materials Science of the State Ethnic Affairs Commission & Ministry of Education,South-Central University for Nationalities, Wuhan 430074, Hubei, China;
b. College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215006, Jiangsu, China;
c. Faculty of Industrial Science and Technology, Universiti Malaysia Pahang, Kuantan 26500, Malaysia;
d. College of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, China

收稿日期:2012-05-29 修回日期:2012-07-08 出版日期:2013-07-20 发布日期:2013-07-27
通讯作者: Jinlin Li
基金资助:
This work was financially supported by the National Natural Science Foundation of China (Grant No. 21073238) and the National Basic Research Program of China (Grant No. 2011CB211704).

Catalytic properties of Ru nanoparticles embedded on ordered mesoporous carbon with different pore size in Fischer-Tropsch synthesis

Kun Xiong^a,d, Yuhua Zhang^a,b, Jinlin Li^a, Kongyong Liew^a,c

a. Key Laboratory of Catalysis and Materials Science of the State Ethnic Affairs Commission & Ministry of Education,South-Central University for Nationalities, Wuhan 430074, Hubei, China;
b. College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215006, Jiangsu, China;
c. Faculty of Industrial Science and Technology, Universiti Malaysia Pahang, Kuantan 26500, Malaysia;
d. College of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, China

Received:2012-05-29 Revised:2012-07-08 Online:2013-07-20 Published:2013-07-27
Supported by:
This work was financially supported by the National Natural Science Foundation of China (Grant No. 21073238) and the National Basic Research Program of China (Grant No. 2011CB211704).

摘要/Abstract

摘要： A series of 3 wt% Ru embedded on ordered mesoporous carbon (OMC) catalysts with different pore sizes were prepared by autoreduction between ruthenium precursors and carbon sources at 1123 K. Ru nanoparticles were embedded on the carbon walls of OMC. Characterization technologies including power X-ray diffraction (XRD), nitrogen adsorption-desorption, transmission electron microscopy (TEM), and hydrogen temperature-programmed reduction (H₂-TPR) were used to scrutinize the catalysts. The catalyst activity for Fischer-Tropsch synthesis (FTS) was measured in a fixed bed reactor. It was revealed that 3 wt% Ru-OMC catalysts exhibited highly ordered mesoporous structure and large surface area. Compared with the catalysts with smaller pores, the catalysts with larger pores were inclined to form larger Ru particles. These 3 wt% Ru-OMC catalysts with different pore sizes were more stable than 3 wt% Ru/AC catalyst during the FTS reactions because Ru particles were embedded on the carbon walls, suppressing particles aggregation, movement and oxidation. The catalytic activity and C₅₊ selectivity were found to increase with the increasing pore size, however, CH₄ selectivity showed the opposite trend. These changes may be explained in terms of the special environment of the active Ru sites and the diffusion of products in the pores of the catalysts, suggesting that the activity and hydrocarbon selectivity are more dependent on the pore size of OMC than on the Ru particle size.

关键词: Fischer-Tropsch synthesis, ordered mesoporous carbon, Ru nanoparticle size, pore size, embedded

Abstract: A series of 3 wt% Ru embedded on ordered mesoporous carbon (OMC) catalysts with different pore sizes were prepared by autoreduction between ruthenium precursors and carbon sources at 1123 K. Ru nanoparticles were embedded on the carbon walls of OMC. Characterization technologies including power X-ray diffraction (XRD), nitrogen adsorption-desorption, transmission electron microscopy (TEM), and hydrogen temperature-programmed reduction (H₂-TPR) were used to scrutinize the catalysts. The catalyst activity for Fischer-Tropsch synthesis (FTS) was measured in a fixed bed reactor. It was revealed that 3 wt% Ru-OMC catalysts exhibited highly ordered mesoporous structure and large surface area. Compared with the catalysts with smaller pores, the catalysts with larger pores were inclined to form larger Ru particles. These 3 wt% Ru-OMC catalysts with different pore sizes were more stable than 3 wt% Ru/AC catalyst during the FTS reactions because Ru particles were embedded on the carbon walls, suppressing particles aggregation, movement and oxidation. The catalytic activity and C₅₊ selectivity were found to increase with the increasing pore size, however, CH₄ selectivity showed the opposite trend. These changes may be explained in terms of the special environment of the active Ru sites and the diffusion of products in the pores of the catalysts, suggesting that the activity and hydrocarbon selectivity are more dependent on the pore size of OMC than on the Ru particle size.

Key words: Fischer-Tropsch synthesis, ordered mesoporous carbon, Ru nanoparticle size, pore size, embedded

Kun Xiong, Yuhua Zhang, Jinlin Li, Kongyong Liew. Catalytic properties of Ru nanoparticles embedded on ordered mesoporous carbon with different pore size in Fischer-Tropsch synthesis[J]. 能源化学(英文), 2013, 22(4): 560-566.

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Catalytic properties of Ru nanoparticles embedded on ordered mesoporous carbon with different pore size in Fischer-Tropsch synthesis

Catalytic properties of Ru nanoparticles embedded on ordered mesoporous carbon with different pore size in Fischer-Tropsch synthesis

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