ZSM-5 supported iron catalysts for Fischer–Tropsch production of light olefin

Kang, Suk-Hwan; Bae, Jong Wook; Woo, Kwang-Jae; Prasad, P. S. Sai; Jun, Ki‐Won

doi:10.1016/j.fuproc.2009.05.023

Cited by 69 publications

(42 citation statements)

References 18 publications

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“…In 40FeZ catalyst, the a-Fe 2 O 3 lines are prominent with weak evidence for characteristic peaks of ZSM5. The observed fact that the intensity of characteristic lines of ZSM5 decreases can be explained by dilution effect of active component as well as loss of crystallinity of ZSM5 structure, and the latter being more likely due to the acidic preparation conditions [6][7][8][9][10]. It is interesting to discuss about lines near 2h = 9°in ZSM5 diffraction patterns.…”

Section: Xrd Studies Of Fe-cu-k/zsm5 Catalystsmentioning

confidence: 95%

“…In the previous investigation, we have also reported the detailed studies on Fe-Cu-K/zeolites FTS catalysts with respect to its effects on reducibility, active phase formation such as surface carbides and its influence on catalyst performance such as CO conversion, water gas shift (WGS) activity and product distribution [6][7][8][9][10]. Furthermore, since the acidic sites on ZSM5 component could help to enhance C 2 -C 4 selectivity by the presence of olefin cracking activity of FTS products reported by our previous work [11], the selection of appropriate ZSM5 components (Si/Al = 25) on the iron-based Fischer-Tropsch catalyst is adopted in the present investigation to obtain high catalytic performance.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Active Component Contents to Catalytic Performance on Fe-Cu-K/ZSM5 Fischer-Tropsch Catalyst

et al. 2009

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Fischer-Tropsch Synthesis (FTS) on Fe-Cu-K/ ZSM5 catalysts prepared by varying the amount of active components for a given amount of ZSM5 has been investigated to elucidate the effects of iron concentration. The catalysts were prepared by conventional wet impregnation method using ZSM5 and subsequently calcined at 500°C for 5 h. The different catalytic performance is verified by the variation of microporosity such as surface area and pore size distribution of Fe-Cu-K/ZSM5, acidity, reducibility of active phases and the presence of various crystalline phases like a-Fe 2 O 3 , metallic iron and iron carbide. The characterization results are analyzed along with catalytic performance to arrive at optimum amount of active components and to obtain maximum selectivity of FTS products with high conversion of CO during FTS reaction.

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Section: Xrd Studies Of Fe-cu-k/zsm5 Catalystsmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

Effect of Active Component Contents to Catalytic Performance on Fe-Cu-K/ZSM5 Fischer-Tropsch Catalyst

et al. 2009

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“…Kang et al used an Fe-Cu-K catalysts supported on ZSM-5 to improve selective olefin production. [31] An Fe-Cu-K/ ZSM-5 catalysts with a low Si/Al ratio (25) was superior to other catalysts, offering a better C2-C4 selectivity and higher olefin/(olefin+paraffin) ratio, possibly due to the facile formation of iron carbide. Park et al instead used a dual-bed reactor approach, with an Fe-Cu-Al based FT catalyst in the first stage and a ZSM-5 cracking catalysts in the second stage.…”

Section: Producing Ethylene and Propylene From Comentioning

confidence: 98%

Can We Afford to Waste Carbon Dioxide? Carbon Dioxide as a Valuable Source of Carbon for the Production of Light Olefins

2011

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Concerns about climate change have increased the amount of activity on carbon capture and sequestration (CCS) as one of the solutions to the problem of rising levels of CO(2) in the troposphere, while the reuse of CO(2) (carbon capture and recycling; CCR) has only recently received more attention. CCR is focused on the possibility of using CO(2) as a cheap (or even negative-value) raw material. This Concept paper analyzes this possibility from a different perspective: In a sustainable vision, can we afford to waste CO(2) as a source of carbon in a changing world faced with a fast depletion of natural carbon sources and in need of a low-carbon, resource-efficient economy? One of the points emerging from this discussion concerns the use of CO(2) for the production of olefins (substituting into or integrating with current energy-intensive methodologies that start from oil or syngas from other fossil fuel resources) if H(2) from renewable resources were available at competitive costs. This offers an opportunity to accelerate the introduction of renewable energy into the chemical production chain, and thus to improve resource efficiency in this important manufacturing sector.

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“…Iron can react easily with supports to form metal complexes and it is difficult to reduce when highly dispersed on refractory oxides such as Al 2 O 3 or MgO. [85] The use of mesoporous materials as catalyst supports have generally resulted in significant improvements compared to commercial catalysts because of the better dispersion of the active metals. Also, mesoporous materials facilitate the selective formation of long-chain hydrocarbons because of the uniform mesoporosity.…”

Section: Chemistry and Catalysts In Conventional Ftsmentioning

confidence: 99%

“…[79] The direct CO 2 hydrogenation has been quite well investigated. [149,150] Iron-based [104,130] small zeolite crystal size reduced extent of deactivation attributable to better diffusion [53,104] large supercages (zeolites LTL, Y) and pores increased reducibility, formation of large Fe particles, better diffusion, and consequently, higher C 5+ selectivity [114] zeolites with low Si/Al ratios (e.g., mordenite, beta, or ZSM-5) composition significantly different from classical straight-chain FTS products mediated by distinct zeolite topologies [130,135] zeolites with low Al content oligomerization and cyclization of light olefins [121] C 2 -C 4 olefins and low molar mass hydrocarbons high Si/Al ratios (low Al content) less acidic zeolites do not promote consecutive oligomerization, cyclization, and dehydrogenation reactions [104] high density of weak acid sites increased olefin selectivity ( % 40 %) [85,130] large zeolite crystal size increases the O/(O+P) ratio [104] impregnation rather than a physical mixture different Fe dispersion [130] promotion with Ti, V, Mn, Cs, K, or Pd see Table 5 -catalysts are active in both the rWGS and FT reaction, which makes this metal an ideal candidate for FTS of CO 2 -containing syngas feeds. [49,56] For CO 2 hydrogenation, the operating temperature must be rather high because of the equilibrium constraints for the rWGS reaction.…”

Section: Iron-based Multifunctional Catalysts For Co 2 Hydrogenationmentioning

confidence: 99%

Exploring Iron‐based Multifunctional Catalysts for Fischer–Tropsch Synthesis: A Review

2011

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The continuous increase in oil prices together with an increase in carbon dioxide concentration in the atmosphere has prompted an increased interest in the production of liquid fuels from non-petroleum sources to ensure the continuation of our worldwide demands while maximizing CO(2) utilization. In this sense, the Fischer-Tropsch (FT) technology provides a feasible option to render high value-added hydrocarbons. Alternative sources, such as biomass or coal, offer a real possibility to realize these purposes by making use of H(2)-deficient or CO(2)-rich syngas feeds. The management of such feeds ideally relies on the use of iron catalysts, which exhibit the unique ability to adjust the H(2)/CO molar ratio to an optimum value for hydrocarbon synthesis through the water-gas-shift reaction. Taking advantage of the emerging attention to hybrid FT-synthesis catalysts based on cobalt and their associated benefits, an overview of the current state of literature in the field of iron-based multifunctional catalysts is presented. Of particular interest is the use of zeolites in combination with a FT catalyst in a one-stage operation, herein named multifunctional, which offer key opportunities in the modification of desired product distributions and selectivity, to eventually overcome the quality limitations of the fuels prepared under intrinsic FT conditions. This review focuses on promising research activities addressing the conversion of syngas to liquid fuels mediated by iron-based multifunctional materials, highlights their preparation and properties, and discusses their implication and challenges in the area of carbon utilization through H(2)/CO(+CO(2)) mixtures.

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ZSM-5 supported iron catalysts for Fischer–Tropsch production of light olefin

Cited by 69 publications

References 18 publications

Effect of Active Component Contents to Catalytic Performance on Fe-Cu-K/ZSM5 Fischer-Tropsch Catalyst

Effect of Active Component Contents to Catalytic Performance on Fe-Cu-K/ZSM5 Fischer-Tropsch Catalyst

Can We Afford to Waste Carbon Dioxide? Carbon Dioxide as a Valuable Source of Carbon for the Production of Light Olefins

Exploring Iron‐based Multifunctional Catalysts for Fischer–Tropsch Synthesis: A Review

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