Aluminosilicate-supported cobalt catalysts in the Fischer-Tropsch synthesis

Лапидус, А. Л.; Pavlova, V. A.; Чинь, Н.К.; Eliseyev, O. L.; Gushchin, V. V.; Davydov, P. E.

doi:10.1134/s0965544109040070

Cited by 6 publications

(5 citation statements)

References 27 publications

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“…The high

C T Y

for Co@mSi x Al y O z is surprising since the material is comparable to Co@mSiO 2 in terms of Co mass loading, Co particle size and pore volume and only differs in the additional presence of Al. Furthermore, research groups reported in literature that aluminosilicates exhibit a comparably low catalytic activity, [27,28] which is in contrast to our findings.…”

Section: Resultscontrasting

confidence: 99%

“…The methane selectivity increases with reaction temperature for Co@mSiO 2 , Co@mSi x Al y O z and Co@silicalite‐1 as expected, exhibiting values comparable to literature for Co@mSiO 2 and Co@silicalite‐1 [20,62] . For Co@mSi x Al y O z Lapidus et al [28] . report values of 7–9 % for Co/aluminosilicate materials at 190 °C, which corresponds well to our observations considering the temperature effect on selectivity.…”

Section: Resultssupporting

confidence: 92%

“…The catalyst material with Si/Al=50 exhibited the highest selectivity towards liquid fuels (C 5 –C 20 ; 63.6 %) and an excellent FT activity due to the mild acidity and relatively good reducibility. Cobalt nanoparticles supported on aluminosilicates and the effect of the particle size as well as promotors for the single‐stage FT reaction were investigated by Lapidus et al [28] . The authors observed an increase in the reaction rate for cobalt crystallites larger than 8–13 nm.…”

Section: Introductionmentioning

confidence: 99%

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Cobalt‐based Nanoreactors in Combined Fischer‐Tropsch Synthesis and Hydroprocessing: Effects on Methane and CO₂ Selectivity

et al. 2021

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The production of liquid hydrocarbons from syngas (CO and H2) via the combined Fischer‐Tropsch (FT) synthesis and hydroprocessing (HP) is a promising strategy to provide valuable chemicals and fuels based on renewable feedstocks. High yields of liquid products are essential for industrial implementation since short‐chain side products like methane and CO2 reduce the overall carbon efficiency, which holds true especially for bi‐functional Co/zeolite catalysts. In order to investigate the influence of the support material properties on the methane and CO2 selectivities in the combined FT and HP reaction, we synthesized four well‐defined catalyst materials with similar cobalt particle sizes. The active material is supported on either meso‐ or microporous silicates or aluminosilicates. The catalytic properties are investigated in FT experiments at industrially relevant conditions (20 bar, 200–260 °C) and correlated with in situ x‐ray absorption spectroscopy results to determine the chemical environment responsible for the selectivity observed. The origin of the high methane selectivity detected for crystalline and amorphous aluminosilicate was mainly traced back to the strong cobalt‐support interactions. The high CO2 selectivity, observed only for crystalline zeolite materials, is driven by the presence of oxidized cobalt species, while the acidic support in combination with micropores and possible overcracking leads to the observed drop in the C5+ selectivity.

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“…The high

C T Y

Section: Resultscontrasting

confidence: 99%

Section: Resultssupporting

confidence: 92%

Section: Introductionmentioning

confidence: 99%

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Cobalt‐based Nanoreactors in Combined Fischer‐Tropsch Synthesis and Hydroprocessing: Effects on Methane and CO₂ Selectivity

et al. 2021

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“…Lapidus et al 196 reported the effect of particle size and promoters on one-stage FT for aluminosilicate-supported catalysts. An increase in the reaction rate was observed when larger particle sizes (8−13 nm) were present in the catalyst, whereas increasing contents of SiO 2 led to higher Co dispersion.…”

Section: Industrial and Engineering Chemistry Researchmentioning

confidence: 99%

Recent Advances in Bifunctional Catalysts for the Fischer–Tropsch Process: One-Stage Production of Liquid Hydrocarbons from Syngas

Martínez-Vargas

Sandoval-Rangel

Campuzano-Calderon

et al. 2019

Ind. Eng. Chem. Res.

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Fischer–Tropsch (FT) synthesis is an important reaction for the alternative production of high-quality liquid fuels, which promote sustainable development by enabling economical decarbonization. The one-stage FT process involves both hydrocarbon growth and hydrocracking/isomerization in a single step and is more energy and cost efficient than the two-stage process. Bifunctional catalysts, composed of acid and metal sites, are needed in order to achieve one-step synthesis. In this review, we discuss the state of the art concerning the use of bifunctional catalysts for the one-stage FT process, focusing on the effect of metal and acid sites on the catalytic performance. Several supports with potential utility for the one-stage FT process were analyzed, including zeolites, clays, alumina, silica, aluminosilicates, and carbons, and the advantages and disadvantages of each are evaluated.

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“…This approach could be advantageous in situations where the more desirable support is either costly, or does not form a reasonable aerogel-like structure on its own. Several conditions combine to determine the activity of the aerogel-supported metals [24][25][26][27][28] , such as the metal precursor, the method used to prepare the metal nanoparticle-aerogel composite, the loaded metal nanoparticle size and surface area, and the porosity and structure of the aerogel itself. Co and Co/Ru nanoparticles supported on silica aerogel 29,30 have been studied in the Fischer-Tropsch process showing efficiency improvement.…”

Section: Introductionmentioning

confidence: 99%

Aerogel nanocomposites for energy applications

Li¹

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Efficient use of petroleum, coal and natural gas resources requires the use of novel materials and developing technologies. Aerogel-supported nanoparticles are materials with great potential in development of new technologies in energy generation, fuel processing, and by-product remediation. Aerogels represent one of the highest surface area materials known, providing an excellent support for catalytic reactions, including those important in the reformation of petroleum resources. The properties and capabilities of these materials may be modified by tuning the porosity, controlling the size and nature of nanoparticles on the support, and varying the reaction conditions. Our focus in this work is the development of oxygen carriers (aerogel with metal nanoparticles) for application in a Chemical Looping Combustion (CLC) system, a process by which the energy is generated from fuel oxidation where the fuel and oxidant are not in direct contact. The structure and composition of the produced materials in our lab was characterized by X-ray Diffraction, Scanning Election Microscopy, Transmission Electron Microscopy, BET, X-ray Photoelectron Spectroscopy, and Inductively Coupled Plasma Mass Spectrometry. Thermogravimetric Analysis was then employed to optimize the reaction conditions and determine which materials presented the greatest potential for CLC. iii ACKNOWLEDGEMENT I would like to express my sincere appreciation to my research advisor Dr. R. Lloyd Carroll, for his patience, guidance and great support for my research and graduate studies. He provided me with opportunities to learn many new techniques along with a plethora of new experiences. I would additionally like to thank the other members of my committee, Dr. Dady Dadyburjor and Dr. Charter D. Stinespring for their excellent instruction and enlightening discussions. I would also like to thank all the professors and staff involved with WV-Nano, who patiently and kindly trained me on their instruments and techniques. Especially I would like to thank Dr. Andy Woodworth, Dr. Kolin Brown, Eric Shires, Dr. Vin Berry, Dr. M. S. Seehra, they helped me a lot on my research.

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Aluminosilicate-supported cobalt catalysts in the Fischer-Tropsch synthesis

Cited by 6 publications

References 27 publications

Cobalt‐based Nanoreactors in Combined Fischer‐Tropsch Synthesis and Hydroprocessing: Effects on Methane and CO₂ Selectivity

Cobalt‐based Nanoreactors in Combined Fischer‐Tropsch Synthesis and Hydroprocessing: Effects on Methane and CO₂ Selectivity

Recent Advances in Bifunctional Catalysts for the Fischer–Tropsch Process: One-Stage Production of Liquid Hydrocarbons from Syngas

Aerogel nanocomposites for energy applications

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Aluminosilicate-supported cobalt catalysts in the Fischer-Tropsch synthesis

Cited by 6 publications

References 27 publications

Cobalt‐based Nanoreactors in Combined Fischer‐Tropsch Synthesis and Hydroprocessing: Effects on Methane and CO2 Selectivity

Cobalt‐based Nanoreactors in Combined Fischer‐Tropsch Synthesis and Hydroprocessing: Effects on Methane and CO2 Selectivity

Recent Advances in Bifunctional Catalysts for the Fischer–Tropsch Process: One-Stage Production of Liquid Hydrocarbons from Syngas

Aerogel nanocomposites for energy applications

Contact Info

Product

Resources

About

Cobalt‐based Nanoreactors in Combined Fischer‐Tropsch Synthesis and Hydroprocessing: Effects on Methane and CO₂ Selectivity

Cobalt‐based Nanoreactors in Combined Fischer‐Tropsch Synthesis and Hydroprocessing: Effects on Methane and CO₂ Selectivity