Fischer–Tropsch synthesis on mono- and bimetallic Co and Fe catalysts supported on carbon nanotubes

Tavasoli, Ahmad; Trépanier, Mariane; Abbaslou, Reza M. Malek; Dalai, Ajay K.; Abatzoglou, Nicolas

doi:10.1016/j.fuproc.2009.07.007

Cited by 127 publications

(68 citation statements)

References 19 publications

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“…Fernandes and Sousa [9] has also reported that an increase in operating pressure would generally increase the chain propagation of CH X monomers onto the active surfaces of the catalysts and hence increase selectivities for higher hydrocarbons. The values for CO conversion and C 5+ selectivity were lower than those reported by Tavasoli et al [2] where they have reported CO conversion of 47% and C 5+ selectivity of 85.1% using 10%Co/CNTs catalyst under similar operating conditions. However, the CH 4 selectivity obtained from this work was similar to value reported by them, which was 9.3%.…”

Section: Catalytic Activitiescontrasting

confidence: 76%

“…Catalyst samples were degassed in a flow of nitrogen at 200 °C. H 2 -TPR was performed using 5% H 2 Morphology of the catalyst samples was characterized using transmission electron microscopy (Zeiss LIBRA 200 TEM at 200 kV). X-ray photoelectron spectra were obtained from K-Alpha spectrometer (Thermo Scientific) at 50 eV pass energy.…”

Section: Methodsmentioning

confidence: 99%

“…al. [2] discovered that the combination of the two most active catalysts, Fe and Co, enhanced the selectivity to alcohols and olefins. It has also been reported that TiO 2 -supported Co-Mn catalyst enhanced the selectivity to higher olefins and middle distillate [3].…”

Section:  1 Introductionmentioning

confidence: 99%

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Effects of Pressure on the Performance of CNTs-Supported Catalyst in a Fischer-Tropsch Reaction

Zabidi¹,

Ali²,

Subbarao³

2014

JMSE-B

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Fischer-Tropsch (FT) reaction involves conversion of syngas (a mixture of carbon monoxide and hydrogen) into higher hydrocarbons in the presence of an active catalyst. The syngas can be derived from non-petroleum feedstocks such as coal, biomass and natural gas, thus the FT reaction provides an alternative route for production of clean fuels. The FT process has received growing interest in recent years due to uncertainty in the Middle East, fast depletion of fossil fuel and environmental concern. This paper reports the synthesis, physicochemical properties and catalytic performance of cobalt-based catalyst in the FT reaction. The catalysts comprised metal nanoparticles supported on carbon nanotubes (CNTs) which were synthesized via a wet impregnation method. The catalysts were characterized using transmission electron microscopy (TEM), temperature-programmed reduction/desorption (TPR/TPD) and X-ray photoelectron spectroscopy (XPS). The performance of the cobalt-based catalyts in a FT reaction was evaluated in a fixed bed microreactor equipped with an on-line gas chromatograph for analyses of hydrocarbon products. The catalysts investigated in this work were Co/CNTs, 70Co30Mn/CNTs, 0.06%K/70Co30Fe/CNTs and 0.04%Nb/70Co30Fe/CNTs. TEM analyses revealed that the average sizes of the metal nanoparticles were 4-5 nm. Based on TPD analyses, the dispersion of these nanoparticles on CNTs were greater than 90%. The presence of both Co 2+ and Co 3+ ions were confirmed by XPS analysis. The 0.04%Nb/70Co30Fe/CNTs catalyst performed better than other catalysts in the FT reaction where it resulted in CO conversion of 35% and 16% C 5+ selectivity at pressure of 1 bar, 220 °C and H 2 :CO of 2:1. Using the same catalyst, the CO conversion and C 5+ selectivity increased to 60% and 57%, respectively when the pressure was increased to 20 bar.

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Section: Catalytic Activitiescontrasting

confidence: 76%

Section: Methodsmentioning

confidence: 99%

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Effects of Pressure on the Performance of CNTs-Supported Catalyst in a Fischer-Tropsch Reaction

Zabidi¹,

Ali²,

Subbarao³

2014

JMSE-B

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“…For example, Tavasoli et al have reported a higher CO conversion with increasing Fe content up to 0.5 wt% for CoFe supported on carbon nanotubes. 36 However,…”

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confidence: 99%

Bimetallic catalysts for the Fischer–Tropsch reaction

et al. 2011

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This short critical review summarises and analyses the developments in Fischer-Tropsch catalysis using bimetallic alloys. We introduce a simple notation for such catalysts, and monitor the reports of synergistic effects and composition/performance relationships. Special attention is given to CoFe alloys on a variety of supports, and to the effects of catalyst preparation methods and pre-treatment conditions. The key drawbacks in comparing the large amount of data available on Fischer-Tropsch catalysis are the high dimensionality of the problem and the lack of long time-on-stream studies. Based on the new understanding coming from characterisation studies of supported bimetallic particles, we propose a structured approach for effectively studying Fischer-Tropsch catalysis.

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“…Since the discovery of FTS in 1923, the common-used catalysts are Co [3,[6][7][8]10], Fe [5,11,12], Ru [13][14][15], and bimetallic Co and Fe [16,17]. Due to their good activity and selectivity, Co-loaded catalysts are often the choice for the low-temperature FTS [2,10].…”

Section: Introductionmentioning

confidence: 99%

Pore size-controlled synthesis of molecular sieves and theirs difference in catalytic properties for Fischer–Tropsch synthesis

Wang

Liu

et al. 2015

Appl Petrochem Res

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Three molecular sieves with different pore size distributions, i.e., mesopore (Al-MCM-41), micropore (ZSM-5) and hierarchical pore (HPMS), were synthesized under hydrothermal condition and characterized by N 2 adsorption-desorption. Three cobalt-loaded catalysts, i.e., Co/Al-MCM-41, Co/ZSM-5 and Co/HPMS, were prepared by impregnating cobalt nitrate onto three molecular sieves, respectively, and characterized by X-ray diffraction, scanning electron microscopy, and H 2 temperature-programmed reduction (H 2 -TPR). The H 2 -TPR results show that the reduction temperature of Co/HPMS is lower than those of Co/Al-MCM-41 and Co/ZSM-5, indicating that Co/HPMS has a better catalytic activity. The selectivity of three catalysts for Fischer-Tropsch synthesis was evaluated in a fixed-bed reactor, and the results show that the pore structure is of important influence on the product distribution. Co/HPMS exhibits significantly good selectivity of C 5-11 and C 12-18 hydrocarbons (up to 25.6 and 27.7 %, respectively), much higher than those of Co/Al-MCM-41 and Co/ZSM-5, due to the confinement effect of micropore and good diffusibility for long-chain hydrocarbons of mesopore in Co/HPMS.

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Fischer–Tropsch synthesis on mono- and bimetallic Co and Fe catalysts supported on carbon nanotubes

Cited by 127 publications

References 19 publications

Effects of Pressure on the Performance of CNTs-Supported Catalyst in a Fischer-Tropsch Reaction

Effects of Pressure on the Performance of CNTs-Supported Catalyst in a Fischer-Tropsch Reaction

Bimetallic catalysts for the Fischer–Tropsch reaction

Pore size-controlled synthesis of molecular sieves and theirs difference in catalytic properties for Fischer–Tropsch synthesis

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