Effect of Preparation Method of Fe–based Fischer–Tropsch Catalyst on their Light Olefin Production

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

doi:10.1007/s10562-009-9925-y

Cited by 33 publications

(17 citation statements)

References 10 publications

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“…The co-precipitated K/FeCuAlO x catalyst with optimal amounts of iron, copper, Al 2 O 3 and potassium as promoter had a surface area of 110 m 2 /g, a pore volume of 0.16 cm 3 /g and an average pore diameter of 4.8 nm, as reported previously [13]. CO conversions and product distributions achieved with the catalysts that were reduced at temperatures between 150 and 450°C are shown in Table 1 and (Table 1) were mainly attributable to the presence of unreduced iron oxides [8,14].…”

Section: Effects Of Reduction Temperature On the K/fecualo X Catalystssupporting

confidence: 80%

“…In addition, selectivities to methane and CO conversion have been reported to increase with increasing reaction temperature and molar ratio of H 2 / CO [22,23]. In the present investigation, the reduction temperature was optimized with respect to the product distribution of FTS with a K/FeCuAlO x catalyst with a composition optimized in earlier studies [8,13,16]. Using the optimized K/FeCuAlO x (400) catalyst, reaction conditions such as reaction temperature, pressure and space velocity were systematically varied to explore the dependence of FTS product distribution at the following reaction conditions: T = 250, 300, and 350°C, P = 1.0, 1.5, and 2.0 MPa and SV = 1,000, 2,000, 3,000, and 4,000 L/kg cat.…”

Section: Effects Of Reaction Variables On Fts Product Distributionmentioning

confidence: 89%

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Effects of Reaction Variables on Fischer–Tropsch Synthesis with Co-Precipitated K/FeCuAlO x Catalysts

et al. 2011

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The effects of reduction temperature and reaction temperature, pressure and space velocity on iron-based K/FeCuAlO x Fischer-Tropsch catalysts prepared by co-precipitation were investigated. The catalyst reduced at 150°C deactivated quickly due to an abundance of unreduced iron species. With increasing reduction temperature, the iron oxide's phase transformed from hematite (a-Fe 2 O 3 ) to magnetite (Fe 3 O 4 ) and finally to metallic iron (a-Fe). The induction period to reach steady-state catalytic activity was reduced at increased reduction temperatures due to in situ reduction by syngas during reaction. CO conversion increased with increasing reaction temperature, and selectivity to C 5 ? decreased with increasing reaction pressure and space velocity. At reaction temperatures up to of 300°C, CO 2 formation by the water-gas shift reaction was linearly correlated with the extent of CO conversion, and CO 2 formation was slightly suppressed at C350°C by a reverse water-gas shift reaction.

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Section: Effects Of Reduction Temperature On the K/fecualo X Catalystssupporting

confidence: 80%

Section: Effects Of Reaction Variables On Fts Product Distributionmentioning

confidence: 89%

Effects of Reaction Variables on Fischer–Tropsch Synthesis with Co-Precipitated K/FeCuAlO x Catalysts

et al. 2011

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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: 96%

“…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%

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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“…[22] Product distribution is highly dependent on the catalyst used and the process conditions. If used alone, iron catalysts utilised for the hydrogenation of CO 2 show insufficient selectivities to olefins.…”

Section: Introductionmentioning

confidence: 99%

Promoter Effects on Iron–Silica Fischer–Tropsch Nanocatalysts: Conversion of Carbon Dioxide to Lower Olefins and Hydrocarbons at Atmospheric Pressure

et al. 2013

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If CO2 hydrogenation is to become a viable process for the utilisation of CO2, improved catalysts are urgently needed. We report the promotional effects of Group 11 and 13 metals on the performance of iron–silica catalyst systems under atmospheric pressure. The addition of low loadings of gold resulted in a significant improvement in catalyst performance both in terms of conversion and selectivity to lower (C2–C4) olefins. Small loadings of indium proved highly effective for increasing CO2 conversion, whereas at higher loadings the selectivity to lower olefins could be dramatically increased. Catalysis tests involving palladium‐promoted systems also proved successful with large increases in selectivity towards C5+ hydrocarbons observed. The catalysts were characterised by X‐ray photoelectron spectroscopy, TEM and SEM, which confirmed the nanostructured nature of the catalytic species involved.

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Effect of Preparation Method of Fe–based Fischer–Tropsch Catalyst on their Light Olefin Production

Cited by 33 publications

References 10 publications

Effects of Reaction Variables on Fischer–Tropsch Synthesis with Co-Precipitated K/FeCuAlO x Catalysts

Effects of Reaction Variables on Fischer–Tropsch Synthesis with Co-Precipitated K/FeCuAlO x Catalysts

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

Promoter Effects on Iron–Silica Fischer–Tropsch Nanocatalysts: Conversion of Carbon Dioxide to Lower Olefins and Hydrocarbons at Atmospheric Pressure

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