Fischer-Tropsch Synthesis of the Promoted Co/ZSM-5 Hybrid Catalysts for the Production of Gasoline Range Hydrocarbons

Kang, Suk-Hwan; Ryu, Jee-Youl; Kim, Jin-Ho; Kim, Hyo-Sik; Lee, Chan-Gi; Lee, Yun-Jo; Jun, Ki‐Won

doi:10.4236/mrc.2014.33013

Cited by 10 publications

(12 citation statements)

References 14 publications

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“…13 As reported in the literature, the use of alumina and silica supports may lead to formation of inactive iron species that then suppress the reducibility of iron oxide as a result of alumina and/or silica iron interaction. 43,48 The NH 3 -TPD profiles and related acid concentrations of catalysts are given in Figure 3a−c and Table 3, respectively. NH 3 -TPD profiles of USY and MOR supports are given in Figure S4a.…”

Section: Resultsmentioning

confidence: 99%

Effects of Rare Earth Metal Promotion over Zeolite-Supported Fe–Cu-Based Catalysts on the Light Olefin Production Performance in Fischer–Tropsch Synthesis

et al. 2022

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Fischer−Tropsch synthesis (FTS), a significant reaction for effective H 2 utilization, is a promising approach for direct production of light olefins from syngas (H 2 + CO). For the FT-Olefin process, an efficient catalyst restricting the product distribution of FTS to light olefins is required. Aligned with this goal, we synthesized 24 catalysts comprising Fe and Cu in combination with rare earth metals (La, Ce, Nd, Ho, Er) and zeolite supports (ultrastable Y and mordenite). FT-Olefin performances of these catalysts were screened using a high-throughput test system at atmospheric pressure, and then promising catalysts were tested under high pressure in a conventional test system. Results show that Nd increases selectivity to light olefins and Ho suppresses C 5 + and coke formation. It is also demonstrated that zeolite−metal interaction, leading to a mixture of both acidic and basic sites, is significant in increasing light olefin production. The mordenite-supported 20 wt % Fe, 0.5 wt % Cu, and 0.5 wt % Ho catalyst provides the highest light olefin yield with the lowest coke and heavier hydrocarbon selectivity.

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Section: Resultsmentioning

confidence: 99%

Effects of Rare Earth Metal Promotion over Zeolite-Supported Fe–Cu-Based Catalysts on the Light Olefin Production Performance in Fischer–Tropsch Synthesis

et al. 2022

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“…ZSM-5 particles with cobalt oxides can also enhance the extent of olefin cracking reaction of FTS products, and it increases the C 5 -C 22 hydrocarbon selectivity, as shown in Figure 27. Kang et al [118] also reported on the effect of a novel metal additive (Ru-nitrate, Pt-nitrate/chloride, and La-nitrate), as shown in Figure 28. Ryu et al later investigated the FTS reaction performance using Co-based catalysts supported on ZSM-5 with Ru, Pt, and La as co-catalysts [119].…”

Section: Zsm Supported Co-based Catalystmentioning

confidence: 98%

“…Effect of Promoter on the correlation between the surface activity and the selectivity of hydrocarbons. Reprinted with permission from[118].…”

mentioning

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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“…It was observed that almost all of the surface acidity of prepared catalysts are expected to have a beneficial effects on activity since there are an increase in the peak area and also shifts in both desorption peak to the lower temperature. According to [13] the weak acidic sites are responsible for FTS reaction and product distribution while the strong acidic sites, even are still on debate, is mainly contributed to dehydration of hydroxyl groups on surfaces. From Fig.…”

Section: Surface Acidity Of Modified Catalystmentioning

confidence: 99%

Acidity effects of K promoted Co-based catalyst with NH₄OH addition of the impregnation solution for Fischer-Tropsch synthesis

et al. 2019

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Fischer-Tropsch synthesis (FTS) with cobalt-based catalyst has been developed to produce wax as a feedstock for further catalytic cracking. During catalyst preparation, NH4OH was added to the salt nitrate precursor to investigate the influence on catalyst acidity. Catalysts were prepared by the dry impregnation method and characterized by XRD, BET and NH3-TPD analyses. These properties were correlated with activity and selectivity of the catalyst. Activity tests showed CO and H2 conversion were in the range of 36.4% to 80.3% and 34.2% to 74.1% respectively. The cobalt particle size measurements exhibited 7.6-8.5 nm. The presence of weak acid sites on catalyst with large surface area and pore size is mainly responsible for obtaining high yields of C5+ hydrocarbon due to suppression of cracking properties. The product distribution showed a higher selectivity to C5+ in the range of 53.57% to 96.5%. In this study, FTS was evaluated by using fixed-bed reactor at 20 bar, 250 C, and WHSV of 1500 ml/g.cat/h-1.

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Fischer-Tropsch Synthesis of the Promoted Co/ZSM-5 Hybrid Catalysts for the Production of Gasoline Range Hydrocarbons

Cited by 10 publications

References 14 publications

Effects of Rare Earth Metal Promotion over Zeolite-Supported Fe–Cu-Based Catalysts on the Light Olefin Production Performance in Fischer–Tropsch Synthesis

Effects of Rare Earth Metal Promotion over Zeolite-Supported Fe–Cu-Based Catalysts on the Light Olefin Production Performance in Fischer–Tropsch Synthesis

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

Acidity effects of K promoted Co-based catalyst with NH₄OH addition of the impregnation solution for Fischer-Tropsch synthesis

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Fischer-Tropsch Synthesis of the Promoted Co/ZSM-5 Hybrid Catalysts for the Production of Gasoline Range Hydrocarbons

Cited by 10 publications

References 14 publications

Effects of Rare Earth Metal Promotion over Zeolite-Supported Fe–Cu-Based Catalysts on the Light Olefin Production Performance in Fischer–Tropsch Synthesis

Effects of Rare Earth Metal Promotion over Zeolite-Supported Fe–Cu-Based Catalysts on the Light Olefin Production Performance in Fischer–Tropsch Synthesis

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

Acidity effects of K promoted Co-based catalyst with NH4OH addition of the impregnation solution for Fischer-Tropsch synthesis

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Acidity effects of K promoted Co-based catalyst with NH₄OH addition of the impregnation solution for Fischer-Tropsch synthesis