Cobalt-supported carbon and alumina co-pillared montmorillonite for Fischer–Tropsch synthesis

Zhao, Yonghua; Song, Yonghong; Hao, Qingqing; Wang, Yanjiao; Wang, Jiaqiang; Liu, Zhao‐Tie; Zhang, Dan; Zhang, Qijian; Lu, Jian

doi:10.1016/j.fuproc.2015.05.019

Cited by 17 publications

(9 citation statements)

References 36 publications

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“…For the Nat-Dia, the characteristic absorption bands of Si–O in-plane stretching vibration (1090 cm −1 ), Si–O symmetric stretching vibration (794 cm −1 ), Si–O–Si bending vibration (472 cm −1 ) are clearly observed (Deng et al., 2019; Khraisheh et al., 2005; Yuan et al., 2013). In addition, the band at 625 cm −1 may be ascribed to the perpendicular vibration of Al–O (Zhao et al., 2015), which is impurity in diatomite. However, compared with spectrum of Nat-Dia, all of the Alk-Dia samples exhibit two new bands at about 3460 and 1645 cm −1 , which are attributed to the –OH stretching and bending vibrations of molecular water (Zhao et al., 2015), furthermore, the intensities of them are increased with increasing the activation temperature, reflecting that the amount of water adsorbed by the Alk-Dia is gradually increased.…”

Section: Resultsmentioning

confidence: 99%

“…In addition, the band at 625 cm −1 may be ascribed to the perpendicular vibration of Al–O (Zhao et al., 2015), which is impurity in diatomite. However, compared with spectrum of Nat-Dia, all of the Alk-Dia samples exhibit two new bands at about 3460 and 1645 cm −1 , which are attributed to the –OH stretching and bending vibrations of molecular water (Zhao et al., 2015), furthermore, the intensities of them are increased with increasing the activation temperature, reflecting that the amount of water adsorbed by the Alk-Dia is gradually increased. This indicates that the surface properties of diatomite have changed during the alkali activation.…”

Section: Resultsmentioning

confidence: 99%

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Adsorption performance of basic fuchsin on alkali-activated diatomite

Zhao

Geng

Cai

et al. 2020

Adsorption Science & Technology

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The natural diatomite was treated with NaOH to obtain alkali-activated diatomite. The materials were systematically characterized by X-ray powder diffraction, X-ray fluorescence, Fourier transform infrared spectroscopic, scanning electron microscopy, and N2 adsorption–desorption. Meanwhile, the potential use of alkali-activated diatomite as adsorbent for the removal of basic fuchsin from aqueous solution was assessed by batch experiment. Results indicated that the structure and textural properties of diatomite were obviously changed via alkali activation, and then affecting its adsorption performance. The adsorption capacity of alkali-activated diatomite for basic fuchsin was higher than that of natural diatomite. In the case of alkali-activated diatomite, its adsorption capacity was increased with increasing the activation temperature, and the diatomite activated at 115°C (alkali-activated diatomite-115) exhibited the maximum adsorption capacity. The pseudo-first-order kinetics and the Sips isotherm model were preferable to describe the adsorption process of basic fuchsin on alkali-activated diatomite-115 and the thermodynamic parameters indicated that the adsorption process was endothermic and spontaneous.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Adsorption performance of basic fuchsin on alkali-activated diatomite

Zhao

Geng

Cai

et al. 2020

Adsorption Science & Technology

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“…The average particle size of d (Co 0 ) was calculated from the d XRD (Co 3 O 4 ) according to following formula [12]: dXRDfalse(Co0false)=0.75 dXRD(Co3O4) where d XRD (Co 0 ) is an average particle size in nm of Co metal and d XRD (Co 3 O 4 ) is the average particle size of Co oxide. The Co 0 metal dispersion ( D XRD ) was estimated by assuming a spherical geometry of the metal particles with a uniform site density of 14.6 atoms/nm 2 using the following formula [13]:D = [96/d XRD (Co 0 )] where D is the % Co 0 dispersion and d XRD (Co 0 ) is the mean particle size of Co 0 in (nm).…”

Section: Experimental Methodsmentioning

confidence: 99%

Alumina Coated Silica Nanosprings (NS) Support Based Cobalt Catalysts for Liquid Hydrocarbon Fuel Production From Syngas

et al. 2019

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The effects of Al2O3 coating on the performance of silica nanospring (NS) supported Co catalysts for Fischer–Tropsch synthesis (FTS) were evaluated in a quartz fixed-bed microreactor. The Co/NS-Al2O3 catalysts were synthesized by coating the Co/NS and NS with Al2O3 by an alkoxide-based sol-gel method (NS-Al-A and NS-Al-B, respectively) and then by decorating them with Co. Co deposition was via an impregnation method. Catalysts were characterized before the FTS reaction by the Brunauer–Emmett–Teller (BET) method, X-ray diffraction, transmission electron microscopy, temperature programmed reduction, X-ray photoelectron spectroscopy, differential thermal analysis and thermogravimetric analysis in order to find correlations between physico-chemical properties of catalysts and catalytic performance. The products of the FTS were trapped and analyzed by GC-TCD and GC-MS to determine the CO conversion and reaction selectivity. The Al2O3 coated NS catalyst had a significant affect in FTS activity and selectivity in both Co/NS-Al2O3 catalysts. A high CO conversion (82.4%) and Σ > C6 (86.3%) yield were obtained on the Co/NS-Al-B catalyst, whereas the CO conversion was 62.8% and Σ > C6 was 58.5% on the Co/NS-Al-A catalyst under the same FTS experimental condition. The Co/NS-Al-A catalyst yielded the aromatic selectivity of 10.2% and oxygenated compounds.

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“…13,14 Also, the effect of exchanging the interlayer cations of the montmorillonite and a carbon/ alumina modified montmorillonite for supported Co catalysts have been evaluated for FTS, obtaining differences in the product distribution. 15,16 It is essential to highlight that Co was incorporated in the materials employing incipient wetness or wet impregnation in all of these reports. Hence, it gives rise to further studies to contribute to the understanding of the effect of the impregnation method on the properties of Al-PILC for FTS.…”

Section: ■ Introductionmentioning

confidence: 99%

Incorporation of Co in Different Stages of the Synthesis of Al-PILC and Its Effect as a Fischer–Tropsch Catalyst

Amaya

Blanco

Toncón-Leal

et al. 2021

Ind. Eng. Chem. Res.

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Different strategies for incorporating cobalt during the synthesis of an Al-pillared clay material were studied to obtain Co-catalysts to be used as a catalyst in the Fischer–Tropsch reaction to produce synthetic fuels. The catalytic materials were characterized employing N2 adsorption–desorption at 77 K, X-ray diffraction, atomic absorption spectroscopy, X-ray photoelectron spectroscopy, temperature-programmed reduction, and Raman spectroscopy. The catalytic activity of the materials for Fischer–Tropsch synthesis was evaluated at a fixed-bed, laboratory-scale microreactor at 2.0 MPa, and the correlations between the method of synthesis, the properties of the materials, and their catalytic behavior were established.

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Cobalt-supported carbon and alumina co-pillared montmorillonite for Fischer–Tropsch synthesis

Cited by 17 publications

References 36 publications

Adsorption performance of basic fuchsin on alkali-activated diatomite

Adsorption performance of basic fuchsin on alkali-activated diatomite

Alumina Coated Silica Nanosprings (NS) Support Based Cobalt Catalysts for Liquid Hydrocarbon Fuel Production From Syngas

Incorporation of Co in Different Stages of the Synthesis of Al-PILC and Its Effect as a Fischer–Tropsch Catalyst

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