Ruthenium promotion of Co/SBA-15 catalysts with high cobalt loading for Fischer–Tropsch synthesis

Xiong, Haifeng; Zhang, Yuhua; Liew, Kongyong; Li, Jinlin

doi:10.1016/j.fuproc.2008.08.014

Cited by 69 publications

(47 citation statements)

References 35 publications

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“…Therefore, Co 3 O 4 was considered the predominant cobalt phase in these catalysts after calcination, in agreement with the XRD results. The shallow features (789.3 eV) on the higher energy side of the main peaks could be ascribed to shake-up satellites associated with some Co 2+ in the high spin state [40], particularly evident for the catalyst Co/ZS-100. The peak intensity of Co 2p 3/2 became enhanced with increasing ZSM-5 in Co/ZS-x catalysts, indicating the increased content of Co 3 O 4 on the Co/ZS-x catalyst surface.…”

Section: Xps Characterization Of Catalystsmentioning

confidence: 97%

A preliminary evaluation of ZSM-5/SBA-15 composite supported Co catalysts for Fischer–Tropsch synthesis

Han

et al. 2015

Fuel Processing Technology

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a b s t r a c t a r t i c l e i n f oA series of ZSM-5/SBA-15 composite supported Co catalysts were prepared and evaluated for the Fischer-Tropsch synthesis (FTS) aimed to maximise the selectivity of C 5 -C 22 hydrocarbons in the product. The composite support was prepared by physically mixing ZSM-5 and SBA-15 of varying proportions and the finished catalysts had a constant Co loading of 15wt.%. The catalysts were tested for their performance in a high pressure fixed-bed reactor operating at T = 240°C, P = 2.0 MPa, H 2 /CO = 2 and GHSV = 1000 h −1. The composite supported catalysts were shown to have much improved catalytic performance over the respective single material supported catalysts. The catalyst with 20wt.% ZSM-5 in the composite support gave the maximum CO conversion (90.6%), maximum selectivity of C 5 -C 22 hydrocarbons (70.0%) and minimum selectivity of light hydrocarbons (13.3% for CH 4 and 7.0% for C 2 -C 4 alkanes). The catalysts were characterized using X-ray diffraction, X-ray photoelectron spectroscopy, scanning electron microscopy, transmission electron microscopy with an energy dispersive X-ray spectrometer, temperature programmed desorption and temperature programmed reduction. It was revealed that the superior catalytic performance can be attributed to the large pore size and high dispersion of Co 3 O 4 , which afforded an optimum reducibility and acid site density.

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Section: Xps Characterization Of Catalystsmentioning

confidence: 97%

A preliminary evaluation of ZSM-5/SBA-15 composite supported Co catalysts for Fischer–Tropsch synthesis

Han

et al. 2015

Fuel Processing Technology

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“…The mixture was filtered using filter paper and kept for room drying. The dried mixture was calcined at 350°C to drive the volatile compounds for 3 h. The amount of impregnation of metal on the SBA-15 was restricted by solubility of metal in the water [45]. The mass transfer conditions during …”

Section: Incipient Wetness Methodsmentioning

confidence: 99%

Optimization of recovery of silica from sugarcane leaf ash and Ca/SBA-15 solid base for transesterification of Calophyllum inophyllum oil

Arumugam

Venkatachalam

2014

J Sol-Gel Sci Technol

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Highly ordered mesoporous material Santa Barbara acid-15 (SBA-15) was obtained from sugarcane leaf ash, a low cost silica source. It is highly critical today to use an inexpensive and non-toxic silica source for SBA-15 production. The objectives of the this study were to (1) investigate the relationship between the time of sonication (t), amount of sodium hydroxide used (W R ) and temperature (T) maintained using response surface methodology and obtain maximum percentage recovery of silica, (2) to synthesis SBA-15 from recovered silica (water glass), (3) to produce biodiesel from Calophyllum inophyllum oil using methanol as alcohol under heterogeneous catalysis. The catalyst medium was a calcium acetate impregnated silicate mesoporous material called SBA-15. The optimum conditions for maximum recovery of SiO 2 (57.99 %) were found to be: reaction temperature-110°C, NaOH to ash weight ratio-1:3 and sonication reaction time-5 h. The transesterification reaction was conducted with different methanol to oil ratios (3:1, 8:1, 12:1, 16:1, 18:1) at different temperatures such as 50, 60, 70, 80 and 90°C in the presence of heterogeneous catalyst. The maximum yield of 88.77 % at 16:1 alcohol to oil ratio (molar) and 96.82 % at the temperature of 80°C was obtained.

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“…Some of the metals used as promoters; like platinum and ruthenium; can themselves act as FT catalysts but due to the high prices of these metals they are more often used as promoters only [7,8,9]. Of the promoters used in this study ruthenium and rhenium are well known as promoters in the FTS.…”

Section: Introductionmentioning

confidence: 98%

Effect of Calcination Conditions on the Dispersion of Cobalt Over Re, Ru and Rh Promoted Co/γ-Al2O3 Catalysts

et al. 2017

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The effects of catalyst calcination conditions, such as calcination temperature and calcination atmosphere composition on the dispersion of cobalt particles over Co/γ Al O catalysts for Fischer-Tropsch conversion of synthesis gas are studied. A number of catalysts were prepared by incipient wetness impregnation of 20 wt% of cobalt onto γ Al O and promoted with 0.5 wt% ruthenium, rhenium, and rhodium. Metal dispersions of active metals were studied by chemisorption of carbon monoxide. The highest dispersion for Co/ γ Al O catalyst was achieved by calcination at 400 °C in a flow of N . Co metal dispersion seem to be increased in the calcination steps if a flowing gas was used instead of static calcination conditions. The addition of promoter metals like Ru, Re or Rh enhances the dispersion of the active metal.

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Ruthenium promotion of Co/SBA-15 catalysts with high cobalt loading for Fischer–Tropsch synthesis

Cited by 69 publications

References 35 publications

A preliminary evaluation of ZSM-5/SBA-15 composite supported Co catalysts for Fischer–Tropsch synthesis

A preliminary evaluation of ZSM-5/SBA-15 composite supported Co catalysts for Fischer–Tropsch synthesis

Optimization of recovery of silica from sugarcane leaf ash and Ca/SBA-15 solid base for transesterification of Calophyllum inophyllum oil

Effect of Calcination Conditions on the Dispersion of Cobalt Over Re, Ru and Rh Promoted Co/γ-Al2O3 Catalysts

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