Selective synthesis of ?-olefins on Fe-Zn Fischer-Tropsch catalysts

Soled, S.; Iglesia, Enrique; Miseo, S.; DeRites, Bruce A.; Fiato, Rocco A.

doi:10.1007/bf01491967

Cited by 92 publications

(87 citation statements)

References 10 publications

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“…Table 1.2 shows the FTS rates and selectivities obtained with the Fe-based catalysts at similar CO conversion levels. Fe-Zn-K 6 showed the best FT performance (highest C 5+ selectivity, lowest CH 4 and C 2 -C 4 selectivity, especially the olefin contents) compared to those on Fe-Zn-K 4 because K promotes the CO chemisorption and inhibits H 2 chemisorption, which leads to lower FTS rates, higher product molecular weight and greater olefin content [3]. The further increase of K/Fe atomic ratio from 0.06 to 0.08 (Fe-Zn-K 8 ), however, did not cause significant changes in the FTS performance (data not shown).…”

Section: Effect Of Promoters On Fischer-tropsch Synthesis Rate and Sementioning

confidence: 98%

“…Zn was used as a textural promoter that increased the surface area of samples during FTS reaction [1]. A solution containing Fe(NO 3 ) 3 (Aldrich, 98 %, 3.0 M) and Zn(NO 3 ) 2 (Aldrich, 98+ %, 1.4 M) at Zn/Fe atomic ratio of 0.1 was added into a large flask containing deionized water (ca. 100 cm 3 ) at 353 K at a rate of 120 cm 3 h -1 using a liquid pump.…”

Section: Synthesis Of Precursors and Catalystsmentioning

confidence: 99%

“…A solution containing Fe(NO 3 ) 3 (Aldrich, 98 %, 3.0 M) and Zn(NO 3 ) 2 (Aldrich, 98+ %, 1.4 M) at Zn/Fe atomic ratio of 0.1 was added into a large flask containing deionized water (ca. 100 cm 3 ) at 353 K at a rate of 120 cm 3 h -1 using a liquid pump. A (NH 4 ) 2 CO 3 (Aldrich, 99.9%, 1.0 M) solution was added separately into this flask at rate required to maintain the pH at constant value of 7.0 ± 0.1, measured with a pH meter.…”

Section: Synthesis Of Precursors and Catalystsmentioning

confidence: 99%

“…Cu or Ru were then added at a Cu/Fe and Ru/Fe atomic ratio of 0.03 (Cu(Ru)/Fe = 0.03) in a second step, followed by overnight drying at 393 K in ambient air. Finally, the samples were treated in flowing dry air at 543 K for 4 h. The resulting oxide precursors are denoted throughout as Fe-Zn-K 6 , Fe-Zn-K 6 -Cu 3 , and Fe-Zn-K 6 -Ru 3 , respectively. The subscripts denote the atomic content of the corresponding promoter divided by the Fe atomic content (×100).…”

Section: Synthesis Of Precursors and Catalystsmentioning

confidence: 99%

“…Therefore, we discuss here the differences in FTS performance between Fe-Zn-K 6 -Cu(Ru) 3 and Fe-ZnCu(Ru) 3 -K 6 from the point view of promoter addition sequence. Aqueous solutions of Cu(NO 3 ) 2 and Ru(NO)(NO 3 ) x (OH) y were used as the source of Cu and Ru promoters.…”

Section: Effect Of Promoters On Fischer-tropsch Synthesis Rate and Sementioning

confidence: 99%

See 4 more Smart Citations

Design, Synthesis, and Mechanistic Evaluation of Iron-Based Catalysis for Synthesis Gas Conversion to Fuels and Chemicals

Iglesia¹,

Ishikawa²,

Ojeda³

et al. 2007

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Section: Effect Of Promoters On Fischer-tropsch Synthesis Rate and Sementioning

confidence: 98%

Section: Synthesis Of Precursors and Catalystsmentioning

confidence: 99%

Section: Synthesis Of Precursors and Catalystsmentioning

confidence: 99%

Section: Synthesis Of Precursors and Catalystsmentioning

confidence: 99%

Section: Effect Of Promoters On Fischer-tropsch Synthesis Rate and Sementioning

confidence: 99%

See 3 more Smart Citations

Design, Synthesis, and Mechanistic Evaluation of Iron-Based Catalysis for Synthesis Gas Conversion to Fuels and Chemicals

Iglesia¹,

Ishikawa²,

Ojeda³

et al. 2007

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Promoters and Poisons

Koel

Kim

2008

Handbook of Heterogeneous Catalysis

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The sections in this article are Introduction Modifiers in Catalysis Structural Modifiers Bonding Modifiers Promoters and Poisons for Some Important Catalytic Reactions Steam Reforming A Reactive Sites on Ni Catalysts B Alkali and Alkaline Earth Promoters for Ni Catalysts C Sulfur Poisoning of Ni Catalysts Water‐Gas Shift Reaction A Iron‐Based Catalysts: High‐Temperature Shift Catalysts a Structural Modifiers in Iron‐Based Catalysts b Metal and Metal Oxides as Promoters for Catalytic Activity B Copper‐Based Catalysts: Low‐Temperature Shift Catalysts a Structural Modifiers b Cesium Modifiers c Sulfur Poisoning Methanation A Active Phase and Structural Modifiers B Electropositive Modifiers C Electronegative Modifiers F ischer– T ropsch Synthesis A Fe ‐Based Catalysts a Active Phase and Structural Modifiers b Metal Modifiers c Sulfur Modification B Co‐Based Catalysts a Electropositive Modifiers b Electronegative Modifiers Ammonia Synthesis A Summary of Iron Ammonia Synthesis Catalysts B Ruthenium Catalysts for Ammonia Synthesis a Active Phase and Structural Modifiers b Metal Modifiers c Poisoning Modifiers Case Studies of the Fundamental Basis of Modifier Action in Catalysis Ca promotion in Pd / Si O 2 Catalysts for Methanol Synthesis Direct Formation of Hydrogen Peroxide A Pd Catalysts for Direct H 2 O 2 Synthesis B Promotion Effects of Halide Anions Methane Reforming on Au  Ni Catalysts A Recent Studies on Ni Catalysts for Methane Reforming B Methane Reforming on Au ‐Modified Ni Catalysts Oxidative Dehydrogenation of Alkanes A Effects of Supports, Loading, and Preparation B Effect of Alkali Metal Additives on Vanadia Catalysts Summary

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Highly Tunable Selectivity for Syngas‐Derived Alkenes over Zinc and Sodium‐Modulated Fe₅C₂ Catalyst

Zhai

Gao

et al. 2016

Angewandte Chemie

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Zn‐ and Na‐modulated Fe catalysts were fabricated by a simple coprecipitation/washing method. Zn greatly changed the size of iron species, serving as the structural promoter, while the existence of Na on the surface of the Fe catalyst alters the electronic structure, making the catalyst very active for CO activation. Most importantly, the electronic structure of the catalyst surface suppresses the hydrogenation of double bonds and promotes desorption of products, which renders the catalyst unexpectedly reactive toward alkenes—especially C5+ alkenes (with more than 50% selectivity in hydrocarbons)—while lowering the selectivity for undesired products. This study enriches C1 chemistry and the design of highly selective new catalysts for high‐value chemicals.

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Selective synthesis of ?-olefins on Fe-Zn Fischer-Tropsch catalysts

Cited by 92 publications

References 10 publications

Design, Synthesis, and Mechanistic Evaluation of Iron-Based Catalysis for Synthesis Gas Conversion to Fuels and Chemicals

Design, Synthesis, and Mechanistic Evaluation of Iron-Based Catalysis for Synthesis Gas Conversion to Fuels and Chemicals

Promoters and Poisons

Highly Tunable Selectivity for Syngas‐Derived Alkenes over Zinc and Sodium‐Modulated Fe₅C₂ Catalyst

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Selective synthesis of ?-olefins on Fe-Zn Fischer-Tropsch catalysts

Cited by 92 publications

References 10 publications

Design, Synthesis, and Mechanistic Evaluation of Iron-Based Catalysis for Synthesis Gas Conversion to Fuels and Chemicals

Design, Synthesis, and Mechanistic Evaluation of Iron-Based Catalysis for Synthesis Gas Conversion to Fuels and Chemicals

Promoters and Poisons

Highly Tunable Selectivity for Syngas‐Derived Alkenes over Zinc and Sodium‐Modulated Fe5C2 Catalyst

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Highly Tunable Selectivity for Syngas‐Derived Alkenes over Zinc and Sodium‐Modulated Fe₅C₂ Catalyst