Ce-promoted Co/Al2O3 catalysts for Fischer–Tropsch synthesis

Pardo-Tarifa, Fatima; Cabrera, Saúl; Sánchez-Domínguez, Margarita; Boutonnet, Magali

doi:10.1016/j.ijhydene.2017.01.056

Cited by 53 publications

(10 citation statements)

References 43 publications

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“…The TPR spectra of all the catalysts display two major reduction peaks with maxima in the ranges of 321-355°C and 393-451°C. These peaks are attributed to the consecutive reduction of Co 3 O 4 to cobalt metal (Co 0 ) [51] according to Eqs. ( 1) and ( 2), and are designated as peak 1 (Co 3 O 4 → CoO) and peak 2 (CoO → Co 0 ), respectively:…”

Section: Resultsmentioning

confidence: 99%

Combined Synthesis and Hydroprocessing of Hydrocarbons over Co/SiO2 + ZSM-5 + Al2O3 Catalysts Promoted by Nickel

et al. 2021

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The study investigates the effects of nickel introduction methods on the properties of a hybrid cobalt catalyst in a combination of Fischer–Tropsch synthesis and the hydroprocessing of the synthesized products. At 240°C, 2 MPa, and syngas WHSV 1000 h–1, the catalytic performances were compared, the products were analyzed for the hydrocarbon and fractional compositions, and the characteristics of the synthesized fuels were determined. Among the catalysts differing in nickel introduction method, the sample with a nickel-containing zeolite component prepared by ion exchange was found to have the highest hydrogenation activity, while the sample with a metal component generated by joint cobalt/nickel introduction [Co/SiO2 + Ni(i)/HZSM-5 + Al2O3] exhibited the highest isomerization activity.

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Section: Resultsmentioning

confidence: 99%

Combined Synthesis and Hydroprocessing of Hydrocarbons over Co/SiO2 + ZSM-5 + Al2O3 Catalysts Promoted by Nickel

et al. 2021

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“…2c) according to JCPDS No. 34-0394 [18]. The CeO 2 form was most likely produced from the oxidation of Ce 2 O 3 previously yielded by Ce(NO 3 ) 3 thermal decomposition.…”

Section: Textural Properties Of Catalystsmentioning

confidence: 98%

“…However, carbon deposition on catalyst surface is the common setback observed for cobalt catalyst [16]. Ceria promoter was recently reported to impede carbonaceous formation in reforming processes, since its high reducibility, oxygen mobility and oxygen storage capacity arising from Ce 4+ ↔ Ce 3+ redox cycle could gasify carbon deposits from catalyst surface [11,17,18]. Therefore, the goal of this work is to examine the feasibility of EGDR on Ce-promoted Co/Al 2 O 3 catalysts at different reaction temperatures.…”

Section: Introductionmentioning

confidence: 99%

Ethylene glycol dry reforming for syngas generation on Ce-promoted Co/Al2O3 catalysts

et al. 2018

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Ethylene glycol dry reforming (EGDR) was investigated for the first time on 10% Co/Al 2 O 3 and 3% Ce-10% Co/Al 2 O 3 catalysts at stoichiometric feed composition under atmospheric pressure and 923-998 K for syngas production. Catalysts were characterized using BET, H 2-TPR, XRD and Raman spectroscopy measurements. The addition of Ce promoter eased the reduction of Co 3 O 4 with lower reduction temperature and enhanced metal dispersion. Ce promotion also improved EGDR performance by increasing reactant conversions, syngas yields and reducing undesirable methane formation. The conversion of ethylene glycol and H 2 yield reached up to 71.7% and 69.3%, respectively.

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“…The measurements were performed on a Micromeritics ASAP 202°C unit at 35°C. A complete description of the sample preparation, procedure and instrument analysis for the materials characterization can be found in our previous work [36].…”

Section: Catalyst Characterizationmentioning

confidence: 99%

Silica with 3D Mesocellular Pore Structure Used as Support for Cobalt Fischer-Tropsch Catalyst

Pardo-Tarifa¹,

Sánchez²,

Claure³

et al. 2017

Synth Catal

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The typical MCM-41 and SBA-15 silica types were modified in order to expand their pores by addition of a swelling agent at mild conditions. The MCM-41, SBA-15 and Pore-expanded (PE) mesoporous silicas, i.e., PE-SBA-15 and PE-MCM-41 were synthesized by the atrane route and used as supports in the preparation of cobalt Fischer-Tropsch catalysts. The synthetized silicas presented a homogeneous morphology with narrow pore size distribution of 1D, 2D and 3D pore structures. The most interesting pore structure and size was presented by the PE-SBA-15 silica, which showed a 3D spherical cell structure of 30 nm diameter interconnected by small window pores of 7 nm of diameter. These supports were used in cobalt catalyst preparation. The characterization results showed that the pore structure and pore size affected the growth of cobalt oxide particles and cobalt-silica interaction. These factors played an important role on the cobalt dispersion and Degree of Reduction (DOR). Co/SBA-15 and Co/PE-SBA-15 catalysts presented similar physicochemical properties related with the Co 3 O 4 , but the pore size and structure of the support was different. All the catalysts were tested in Fischer-Tropsch reaction at close to industrial conditions. Co/PE-SBA-15 catalyst showed the best CO conversion and selectivity to long-chain hydrocarbons, results attributed to the higher degree of reduction of cobalt but mainly to the open network with 3D structure pores of the silica support which reduced the diffusion limitations of the reactants and products.

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Ce-promoted Co/Al2O3 catalysts for Fischer–Tropsch synthesis

Cited by 53 publications

References 43 publications

Combined Synthesis and Hydroprocessing of Hydrocarbons over Co/SiO2 + ZSM-5 + Al2O3 Catalysts Promoted by Nickel

Combined Synthesis and Hydroprocessing of Hydrocarbons over Co/SiO2 + ZSM-5 + Al2O3 Catalysts Promoted by Nickel

Ethylene glycol dry reforming for syngas generation on Ce-promoted Co/Al2O3 catalysts

Silica with 3D Mesocellular Pore Structure Used as Support for Cobalt Fischer-Tropsch Catalyst

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