Performance of Cobalt-Based Fischer-Tropsch Synthesis Catalysts Using Dielectric-Barrier Discharge Plasma as an Alternative to Thermal Calcination  

作　　者：BAI Suli HUANG Chengdu LV Jing LI Zhenhua 白素丽;黄承都;吕静;李振花(Key Lab for Green Chemical Technology of the Ministry of Education,School of Chemical Engineering and Technology,Tianjin University,Tianjin 300072,China)

机构地区：[1]Key Lab for Green Chemical Technology of the Ministry of Education,School of Chemical Engineering and Technology,Tianjin University,Tianjin 300072,China

出　　处：《Plasma Science and Technology》2012年第1期54-57,共4页等离子体科学和技术（英文版）

基　　金：supported by National Natural Science Foundation of China (No.21076151)

摘　　要：Co-based catalysts were prepared by using dielectric-barrier discharge （DBD） plasma as an alternative method to conventional thermal calcination. The characterization results of N2-physisorption, temperature programmed reduction （TPR）, transmission electron microscope （TEM）, and X-ray diffraction （XRD） indicated that the catalysts prepared by DBD plasma had a higher specific surface area, lower reduction temperature, smaller particle size and higher cobalt dispersion as compared to calcined catalysts. The DBD plasma method can prevent the sintering and aggregation of active particles on the support due to the decreased treatment time （0.5 h） at lower temperature compared to the longer thermal calcination at higher temperature （at 500~C for 5 h）. As a result, the catalytic performance of the Fischer-Tropsch synthesis on DBD plasma treated Co/Si02 catalyst showed an enhanced activity, C5＋ selectivity and catalytic stability as compared to the conventional thermal calcined Co/SiO2 catalyst.Co-based catalysts were prepared by using dielectric-barrier discharge （DBD） plasma as an alternative method to conventional thermal calcination. The characterization results of N2-physisorption, temperature programmed reduction （TPR）, transmission electron microscope （TEM）, and X-ray diffraction （XRD） indicated that the catalysts prepared by DBD plasma had a higher specific surface area, lower reduction temperature, smaller particle size and higher cobalt dispersion as compared to calcined catalysts. The DBD plasma method can prevent the sintering and aggregation of active particles on the support due to the decreased treatment time （0.5 h） at lower temperature compared to the longer thermal calcination at higher temperature （at 500~C for 5 h）. As a result, the catalytic performance of the Fischer-Tropsch synthesis on DBD plasma treated Co/Si02 catalyst showed an enhanced activity, C5＋ selectivity and catalytic stability as compared to the conventional thermal calcined Co/SiO2 catalyst.

关 键 词：COBALT dielectric-barrier discharge plasma carbon nanotubes Fischer- Tropsch synthesis 

分 类 号：O53[理学—等离子体物理]