The characterization of micro-structure of cobalt on γ-Al2O3 for FTS: Effects of pretreatment on Ru–Co/γ-Al2O3

Jung, Junhee; Lee, Jae‐Suk; Choi, Garam; Ramesh, Sivalingam; Moon, Dong Ju

doi:10.1016/j.fuel.2014.09.001

Cited by 39 publications

(18 citation statements)

References 40 publications

(41 reference statements)

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“…The effects of the support material, the Co loading and the addition of promotors were investigated in the first library, which consisted of 144 samples. Support materials Al2O3 [1,11,[22][23][24][25][26][27][28][29][30], TiO2 [6,11,28,[31][32][33][34][35][36][37] ZrO2 [28,32,33], SiO2 [2,11,28,32,[38][39][40][41][42][43][44][45] active carbon (AC) [27,30,46,47], and SiC [48,49] were used. Despite the reactivity of metal oxides, particularly Al2O3, with Co they were selected as supports for their porosity and thermal stability.…”

Section: Results Of the First Librarymentioning

confidence: 99%

“…The Fischer Tropsch Synthesis (FTS) is an important process for the production of long chain hydrocarbons from syngas (a mixture of CO and H2) using Co and Fe based catalyst materials. The development of active and stable catalysts for FTS is particularly difficult due to the complex nature of the reaction and the complex interactions between active material, support and promotors, the mixture of similar products and the long-time experiments needed for the measurement of activity and stability [1][2][3]. The activity of FTS catalysts is attributed to different factors such as the particle size, active metal phase, the metal surface area, and the interactions with the support material [4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

“…The activity of FTS catalysts is attributed to different factors such as the particle size, active metal phase, the metal surface area, and the interactions with the support material [4][5][6][7]. The presence of different Co polymorphs (fcc and hcp) for example plays an important role in the activity of the catalysts and has been subject to many studies recently, showing that the hcp Co phase is more active than the fcc Co phase in FTS [1,2,[8][9][10]. The deactivation of the catalysts can occur through different mechanisms like sintering, oxidation, formation of metal-support compounds, carbon deposition and poisoning [4,7,11,12].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

High-Throughput Discovery of Hf Promotion on the Formation of Hcp Co and Fischer-Tropsch Activity

Rupflin¹,

Rensberg²,

Zanella³

et al. 2020

Preprint

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A proxy-based high-throughput experimental approach was used to explore the stability and activity of Co-based Fischer Tropsch Synthesis catalysts with different promoters on various supports. The protocol is based on the estimation by XRD of active phase, Co, particle size and relative amounts of crystalline phases, Co to support. Sequential libraries samples enabled exploration of four Co loadings with five different promoters on six support materials. Catalysts stable to aging in syngas, displaying minimal change of particle size or relative area, were evaluated for their activity under industrial conditions. This procedure identified SiC as support for stable catalysts and a combination of Ru and Hf to promote the formation hcp Co. Unsupported bulk samples of Co with appropriate amounts of Ru and Hf revealed that the formation of hcp Co is independent of the support. The hcp Co containing catalyst presented the highest catalytic activity and C<sub>5+</sub> selectivity amongst the samples tested in this study confirming the effectiveness of the proxy-based high-throughput method.

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Section: Results Of the First Librarymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

High-Throughput Discovery of Hf Promotion on the Formation of Hcp Co and Fischer-Tropsch Activity

Rupflin¹,

Rensberg²,

Zanella³

et al. 2020

Preprint

View full text Add to dashboard Cite

show abstract

“…[27,[63][64][65][66]. However, in addition to the aforementioned physical properties, chemical properties such as chemical interaction between active and support materials should also be considered because reducibility, metal particle size, and shape are affected by the strong metal surface interaction (SMSI) [67][68][69][70][71]. The strong metal support interaction affects the active metal shape and the size during H 2 reduction on top of the support.…”

Section: Support Materialsmentioning

confidence: 99%

Catalytic Technologies for CO Hydrogenation for the Production of Light Hydrocarbons and Middle Distillates

et al. 2020

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In South Korea, where there are no resources such as natural gas or crude oil, research on alternative fuels has been actively conducted since the 1990s. The research on synthetic oil is subdivided into Coal to Liquid (CTL), Gas to Liquid (GTL), Biomass to Liquid (BTL), etc., and was developed with the focus on catalysts, their preparation, reactor types, and operation technologies according to the product to be obtained. In Fischer–Tropsch synthesis for synthetic oil from syngas, stability, CO conversion rate, and product selectivity of catalysts depends on the design of their components, such as their active material, promoter, and support. Most of the developed catalysts were Fe- and Co-based catalysts and were developed in spherical and cylindrical shapes according to the reactor type. Recently, hybrid catalysts in combination with cracking catalysts were developed to control the distribution of the product. In this review, we survey recent studies related to the design of catalysts for production of light hydrocarbons and middle distillates, including hybrid catalysts, encapsulated core–shell catalysts, catalysts with active materials with well-organized sizes and shapes, and catalysts with shape- and size-controlled supports. Finally, we introduce recent research and development (R&D) trends in the production of light hydrocarbons and middle distillates and in the catalytic processes being applied to the development of catalysts in Korea.

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“…Alumina support, a practically inert compound, permits stabilization of the active species by providing an opportunity to disperse over a large surface area. Otherwise, several attractive features such as Co-support interaction strength, good mechanical properties, adjustable pore structure and high resistance to attrition were reported [37][38][39]. It should be emphasized that the cobalt species are not dangerous compared to those of mercury, lead, cadmium, arsenic and chrome.…”

Section: Introductionmentioning

confidence: 99%

Cobalt supported on alumina as green catalyst for Biginelli reaction in mild conditions: effect of catalyst preparation method

Khiar

Mazari

Bennini

et al. 2017

Green Processing and Synthesis

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Cobalt supported on alumina (10 wt% Co/Al 2 O 3 ) was synthesized by three different methods; sol-gel (SG), microemulsion (ME) and impregnation (IMP). The materials were characterized by the Brunauer-Emmett-Teller (BET) method, X-ray diffraction (XRD), X-ray fluorescence, scanning electron microscopy (SEM) and transmission electron microscopy (TEM) analysis. Their catalytic activity was investigated toward the formation of Biginelli reaction products, 3,4-dihydropyrimidin(1H)-ones (DHPMs). The catalysts were found to be efficient for this reaction with yields between 50% and 71% and can be reused without great loss of efficiency. Among the catalytic systems, that prepared by the SG method is the most active with 71% of DHPMs yield under solvent free conditions at 100°C for 1 h of reaction time.

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The characterization of micro-structure of cobalt on γ-Al2O3 for FTS: Effects of pretreatment on Ru–Co/γ-Al2O3

Cited by 39 publications

References 40 publications

High-Throughput Discovery of Hf Promotion on the Formation of Hcp Co and Fischer-Tropsch Activity

High-Throughput Discovery of Hf Promotion on the Formation of Hcp Co and Fischer-Tropsch Activity

Catalytic Technologies for CO Hydrogenation for the Production of Light Hydrocarbons and Middle Distillates

Cobalt supported on alumina as green catalyst for Biginelli reaction in mild conditions: effect of catalyst preparation method

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