Cobalt supported on carbon nanotubes — A promising novel Fischer–Tropsch synthesis catalyst

Tavasoli, Ahmad; Sadagiani, Kambiz; Khorashe, F.; Seifkordi, Ali Akbar; Rohani, Aliasghar; Nakhaeipour, Ali

doi:10.1016/j.fuproc.2007.09.008

Cited by 183 publications

(116 citation statements)

References 10 publications

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“…However, the volcano-shaped curve observed in the present study thus reflects a difference with the trend of cobalt dispersion and extent of reduction when tuning the FA content. To better account for the interesting phenomenon, the number of active cobalt sites is introduced to comprehensively understand the influence of dispersion and reducibility, which is defined as [34] :…”

Section: Catalytic Results Of the Fts Reactionmentioning

confidence: 99%

Fischer–Tropsch Synthesis over Ordered Mesoporous Carbon Supported Cobalt Catalysts: The Role of Amount of Carbon Precursor in Catalytic Performance

et al. 2011

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Ordered mesoporous carbon supported cobaltbased catalysts (Co/MC) were synthesized via incipient wetness impregnation with different amounts of furfuryl alcohol (FA) as carbon precursor. The characterizations of obtained Co/MC were subjected to N 2 adsorption, XRD, XPS, TEM, H 2 -TPR, H 2 -TPD and H 2 -TPSR. The results indicate that the reducibility and dispersion of Co active species vary significantly due to the difference of FA amount. By simply tuning the FA content from 25 to 100 wt%, the reduction temperature of deriving metallic Co shifts gradually to lower. The catalytic performance of Co/MC was evaluated for Fischer-Tropsch (FT) synthesis. The observed FT activity exhibits a volcano-type curve with the amount of FA due to the effect of both reducibility and dispersion of active species. As the precursor concentration overweighs 50 wt%, the ability of CO to dissociate over the active surface and the selectivity to the C 5? products level off after experiencing an initial increase. Substantially, the catalysts with higher concentration of FA render the larger crystallites having an average size of more than 6 nm, which facilitates the CO hydrogenation by way of carbon chain propagation. It seems that the sample with FA content of 50 wt% is optimum in terms of FT activity and C 5? selectivity.

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Section: Catalytic Results Of the Fts Reactionmentioning

confidence: 99%

Fischer–Tropsch Synthesis over Ordered Mesoporous Carbon Supported Cobalt Catalysts: The Role of Amount of Carbon Precursor in Catalytic Performance

et al. 2011

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“…On the other hand, the higher value of CH 4 production rate was related to the occurrence of the undesired methanation reaction. It has been reported that this reaction takes place when high-activity FTS catalysts are used, being promoted at higher temperatures (N493 K) [42,43].…”

Section: Catalytic Performancementioning

confidence: 99%

Carbon nanofibers and nanospheres-supported bimetallic (Co and Fe) catalysts for the Fischer–Tropsch synthesis

Díaz

Romero

García-Minguillán

et al. 2015

Fuel Processing Technology

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“…Cobalt based catalysts are widely applied for FTS because of their high activity, low water-gas shift activity, high selectivity to long chain hydrocarbons and low operating temperature [2,[5][6][7]. In order to improve the activity and selectivity of cobalt-based FTS, the cobalt precursor would be dispersed onto porous supports such as SiO 2 , Al 2 O 3 , TiO 2, and carbon nanotubes [8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Effect of hierarchical meso-macroporous silica supports on Fischer-Tropsch synthesis using cobalt catalyst

Witoon

Chareonpanich

Limtrakul

2011

Fuel Processing Technology

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Cobalt supported on carbon nanotubes — A promising novel Fischer–Tropsch synthesis catalyst

Cited by 183 publications

References 10 publications

Fischer–Tropsch Synthesis over Ordered Mesoporous Carbon Supported Cobalt Catalysts: The Role of Amount of Carbon Precursor in Catalytic Performance

Fischer–Tropsch Synthesis over Ordered Mesoporous Carbon Supported Cobalt Catalysts: The Role of Amount of Carbon Precursor in Catalytic Performance

Carbon nanofibers and nanospheres-supported bimetallic (Co and Fe) catalysts for the Fischer–Tropsch synthesis

Effect of hierarchical meso-macroporous silica supports on Fischer-Tropsch synthesis using cobalt catalyst

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