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 siz...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.展开更多
Syngas(CO/H_2)is a key platform that bridges various carbon resources(including natural gas or shale gas,coal and biomass)and liquid fuels or high-value chemicals.In addition to these carbon resources,syngas can also ...Syngas(CO/H_2)is a key platform that bridges various carbon resources(including natural gas or shale gas,coal and biomass)and liquid fuels or high-value chemicals.In addition to these carbon resources,syngas can also be produced from waste and CO_2.From syngas,a variety of products such as hydrocarbons,which can be either liquid fuels(gasoline,diesel fuel and jet fuel)or building-block展开更多
基金supported by the National Basic Research Program of China (No. 2013CB933100)the National Natural Science Foundation of China (21173174, 21161130522, 21033006 and 20923004)+1 种基金the Program for Changjiang Scholars and Innovative Research Team in University (No. IRT1036)the Research Fund for the Doctoral Program of Higher Education (No. 20090121110007)
文摘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.
基金supported by the National Natural Science Foundation of China(91545203,21433008,21673188,21503174)
文摘Syngas(CO/H_2)is a key platform that bridges various carbon resources(including natural gas or shale gas,coal and biomass)and liquid fuels or high-value chemicals.In addition to these carbon resources,syngas can also be produced from waste and CO_2.From syngas,a variety of products such as hydrocarbons,which can be either liquid fuels(gasoline,diesel fuel and jet fuel)or building-block
