Fischer–Tropsch synthesis over cobalt dispersed on carbon nanotubes-based supports and activated carbon

Zaman, Muhammad Iqbal; Khodadi, A.; Mortazavi, Yadollah

doi:10.1016/j.fuproc.2009.05.026

Cited by 64 publications

(31 citation statements)

References 13 publications

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“…409,411 Compared to activated carbon and MgO, CNT-supported cobalt affords the highest CO conversion and Co/CNTs-MgO enhances the selectivity toward C 5+ , the most valuable Fischer-Tropsch synthesis products while it reduces the selectivity toward CH 4 , the most unwanted product. 423 Compared with activated carbonsupported Fe catalysts, Fe/CNT catalysts possess lower selectivity toward methane and high selectivity to olefins. 429 The selectivity of the Co/CNT catalyst can be greatly changed if a manganese promoter is applied.…”

Section: Hydrogenation Reactions Cnts and Functionalizedmentioning

confidence: 99%

Carbon nanotube catalysts: recent advances in synthesis, characterization and applications

et al. 2015

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Carbon nanotubes are promising materials for various applications. In recent years, progress in manufacturing and functionalizing carbon nanotubes has been made to achieve the control of bulk and surface properties including the wettability, acid-base properties, adsorption, electric conductivity and capacitance. In order to gain the optimal benefit of carbon nanotubes, comprehensive understanding on manufacturing and functionalizing carbon nanotubes ought to be systematically developed. This review summarizes methodologies of manufacturing carbon nanotubes via arc discharge, laser ablation and chemical vapor deposition and functionalizing carbon nanotubes through surface oxidation and activation, doping of heteroatoms, halogenation, sulfonation, grafting, polymer coating, noncovalent functionalization and nanoparticle attachment. The characterization techniques detecting the bulk nature and surface properties as well as the effects of various functionalization approaches on modifying the surface properties for specific applications in catalysis including heterogeneous catalysis, photocatalysis, photoelectrocatalysis and electrocatalysis are highlighted.

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Section: Hydrogenation Reactions Cnts and Functionalizedmentioning

confidence: 99%

Carbon nanotube catalysts: recent advances in synthesis, characterization and applications

et al. 2015

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“…A recent study demonstrated that, although Co/CNT was not more selective toward C 5 + formation than Co/Al 2 O 3 , the Co catalyst loaded on CNTs grown on MgO (Co/CNT-MgO) exhibited higher C 5 + selectivity and a markedly increased olefin/paraffin ratio of C 2 -C 3 (11.2). [212] The effect of acid pretreatment for CNTs on the catalytic behavior of the supported Co catalysts was investigated. [213] HNO 3 pretreatment opened the caps of the closed tubes, producing catalysts with a larger fraction of Co particles homogeneously dispersed within the tubes.…”

Section: Novel Carbon Materials As Efficient Supports For Ft Catalystsmentioning

confidence: 99%

“…As described above, the use of CNFs or CNTs as the supports of Co could result in both higher reducibility (weaker metalsupport interactions) and higher Co dispersion. [205][206][207][208][209][210][211][212][213][214] A comprehensive study on the Co size effect using Co/CNF catalysts with average Co particle sizes ranging from 2.6 to 27 nm was reported by de Jong and co-workers. [220] They confirmed that cobalt species over these catalysts were in metallic state before and after FT reactions, and no cobalt oxide or carbide phases were detected after reactions.…”

Section: Effect Of Size Of Metal Nanoparticles On Ft Synthesismentioning

confidence: 99%

Development of Novel Catalysts for Fischer–Tropsch Synthesis: Tuning the Product Selectivity

2010

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Fischer-Tropsch synthesis is a heterogeneous catalytic process for the production of clean hydrocarbon fuels or chemicals from synthesis gas (CO+H-2), which can be derived from non-petroleum feedstocks such as natural gas, coal, or biomass. Fischer-Tropsch synthesis has received renewed interests in recent years because of the global demand for a decreased dependence on petroleum for production of fuels and chemicals. The product distributions with conventional Fischer-Tropsch catalysts usually follow the Anderson-Schulz-Flory distribution and are typically unselective with regards to the formation of hydrocarbons from methane to waxes. Selectivity control is one of the key challenges of research into Fischer-Tropsch synthesis. This Review article summarizes the effects of key factors on catalytic properties, particularly the product selectivity, and highlights recent developments of novel Fischer-Tropsch catalysts and new strategies with an aim at controlling the product selectivity.National Natural Science Foundation of China [20625310, 20923004]; National Basic Research Program of China [2005CB221408, 2010CB732303]; Research Fund for the Doctoral Program of Higher Education [20090121110007]; Key Scientific Project of Fujian Province [2009HZ0002-1

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“…11 Unfortunately, a strong metal -support interaction is inherent to alumina and leads to the formation of hardly reducible cobalt-aluminate spinels being inactive in FT synthesis. 3,4,5,12 These drawbacks could be overcome by using activated carbons characterized by chemical inertness and high surface area.…”

Section: Introductionmentioning

confidence: 99%

Fischer–Tropsch synthesis over MOF-supported cobalt catalysts (Co@MIL-53(Al))

et al. 2016

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Novel nanohybrid materials were prepared by immobilizing Co nanoparticles on a microporous framework MIL-53(Al) as a porous host matrix. The synthesized cobalt-containing materials were characterized by XRD, STEM, and oxygen titration. The catalytic performance of Co@MIL-53(Al) nanohybrids was examined in Fischer-Tropsch synthesis (FTS) for the first time. A higher selectivity to C5+ hydrocarbons and lower selectivity to methane for Co@MIL-53(Al) as compared to conventional Co/Al2O3 were observed.

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Fischer–Tropsch synthesis over cobalt dispersed on carbon nanotubes-based supports and activated carbon

Cited by 64 publications

References 13 publications

Carbon nanotube catalysts: recent advances in synthesis, characterization and applications

Carbon nanotube catalysts: recent advances in synthesis, characterization and applications

Development of Novel Catalysts for Fischer–Tropsch Synthesis: Tuning the Product Selectivity

Fischer–Tropsch synthesis over MOF-supported cobalt catalysts (Co@MIL-53(Al))

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