Effect of the promoter presence in catalysts on the compositions of Fischer–Tropsch synthesis products

Mangaloğlu, Deniz Uykun; Baranak, Murat; Ataç, Özlem; Atakül, Hüsnü

doi:10.1016/j.jiec.2018.05.044

Cited by 15 publications

(12 citation statements)

References 49 publications

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“…Chemical treatments have been proposed in order to generate favorable mesoporosity of zeolite supports, for example, solvent-free in situ synthesis, 115 sequential dealuminization− desilication, 108 alkaline treatment, 82,113,116 soft template, 82 steam-assisted crystallization, 114 and delamination. 117 All of these methods were reported to result in an increase in CO conversion and selectivity toward hydrocarbons in the liquid range at the expense of CH 4 selectivity. Mesopores promote enhanced accessibility of the acid sites when compared with microporous zeolites.…”

Section: Bifunctional Catalysts For the One-stagementioning

confidence: 99%

“…Mesopores promote enhanced accessibility of the acid sites when compared with microporous zeolites. 117 The mesopore size has a significant effect on the FT process performance. Peng et al 107 reported that a mesopore size of around 15 nm favors selectivity toward hydrocarbons in the diesel range (∼60%) and decreases selectivity in the gasoline range and for CH 4 (∼5%).…”

Section: Bifunctional Catalysts For the One-stagementioning

confidence: 99%

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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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Section: Bifunctional Catalysts For the One-stagementioning

confidence: 99%

Section: Bifunctional Catalysts For the One-stagementioning

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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“…Dry reforming of methane (DRM) has been regarded as a process to produce syngas (CO and H 2 ), while providing a prospective solution for mitigation of greenhouse gases (CH 4 and CO 2 ). The produced syngas is a valuable precursor for many other downstream applications [1,2]. It can be used directly as fuel or converted to other hydrocarbons to produce valuable ultra-clean fuels and products such as methanol, diesel, gasoline, kerosene and naphtha via Fischer-Tropsch synthesis, and other reactions [3,4].…”

Section: Introductionmentioning

confidence: 99%

Mechanistic Insights for Dry Reforming of Methane on Cu/Ni Bimetallic Catalysts: DFT-Assisted Microkinetic Analysis for Coke Resistance

et al. 2020

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Density functional theory (DFT) calculations have been utilized to evaluate the complete reaction mechanism of methane dry reforming (DRM) over Ni2Cu (111) bimetallic catalyst. The detailed catalytic cycle on Ni2Cu (111) catalyst demonstrated superior coke resistance compared to pure Ni (111) and Ni2Fe (111) reported in the literature. Doping Cu in the Ni–Ni network enhanced the competitive CH oxidation by both atomic O and OH species with the latter having only 0.02 eV higher than the 1.06 eV energy barrier required for CH oxidation by atomic O. Among the C/CH oxidation pathways, C* + O* → CO (g) was the most favorable with an energy barrier of 0.72 eV. This was almost half of the energy barrier required for the rate-limiting step of CH decomposition (1.40 eV) and indicated enhanced coke deposition removal. Finally, we investigated the effect of temperature (800~1000 K) on the carbon deposition and elimination mechanism over Ni2Cu (111) catalyst. Under those realistic DRM conditions, the calculations showed a periodic cycle of simultaneous carbon deposition and elimination resulting in improved catalyst stability.

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“…Among these advantages are: the higher activity by weight of the metal, higher resistance to water deactivation, and the lower production of oxygenates. To improve the performance of these catalysts, the "promoters" are generally used (Mangaloğlu et al, 2018;Rodrigues et al, 2013;Zhao et al, 1998).…”

Section: Introductionmentioning

confidence: 99%

“…Interestingly, SBA-15 also has thicker pore walls and better hydrothermal stability than MCM-41. These features can be relevant for the FTS process because water is a by-product of the reaction (Mangaloğlu et al, 2018;Phaahlamohlaka et al, 2018;Rodrigues et al, 2013;Zhao et al, 1998).…”

Section: Introductionmentioning

confidence: 99%

The Use of Cobalt/Ruthenium Catalyst Supported in Sba-15 in the Promotion of Fischer-Tropsch Synthesis

Rodrigues

Fernandes²,

Rodrigues³

2020

BJPG

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The aim of this work is to produce a cobalt/ruthenium catalyst supported in SBA-15, for Fischer-Tropsch synthesis (FTS). The synthesis was carried out in a slurry reactor operating at 513 K, 20 atm, and CO:H 2 molar ratio of 1:1. The addition of cobalt in SBA-15 decreased the specific superficial area of the molecular sieve. The ranges of temperature reduction typical of iron oxides phases were found using RTP results. Fischer-Tropsch synthesis activity and C 5 + hydrocarbon selectivity increased with the addition of Ru. The increase in activity and selectivity were attributed to the increased number of active sites as a result of the higher reducibility.

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Effect of the promoter presence in catalysts on the compositions of Fischer–Tropsch synthesis products

Cited by 15 publications

References 49 publications

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

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

Mechanistic Insights for Dry Reforming of Methane on Cu/Ni Bimetallic Catalysts: DFT-Assisted Microkinetic Analysis for Coke Resistance

The Use of Cobalt/Ruthenium Catalyst Supported in Sba-15 in the Promotion of Fischer-Tropsch Synthesis

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