Comparative Study on CO2 Hydrogenation to Higher Hydrocarbons over Fe-Based Bimetallic Catalysts

Satthawong, Ratchprapa; Koizumi, Naoto; Song, Chunshan; Prasassarakich, Pattarapan

doi:10.1007/s11244-013-0215-y

Cited by 86 publications

(67 citation statements)

References 25 publications

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“…There is some consensus that an Fe carbide formed during the reaction is the catalytically active phase; however, reports also state that Fe catalysts are poisoned by water, an unavoidable byproduct, which negatively influences catalytic activity and product selectivity . Conversely, Co‐based catalysts are water tolerant and modifying an Fe catalyst with Co improves catalytic performance and selectivity towards C 2+ hydrocarbon products . Improvements have also been made to Fe‐based catalysts by adding Cu, which enhances CO 2 ‐FT activity and selectivity …”

Section: Introductionmentioning

confidence: 99%

“…Conversely, Co‐based catalysts are water tolerant and modifying an Fe catalyst with Co improves catalytic performance and selectivity towards C 2+ hydrocarbon products . Improvements have also been made to Fe‐based catalysts by adding Cu, which enhances CO 2 ‐FT activity and selectivity …”

Section: Introductionmentioning

confidence: 99%

“…[10,11] Conversely,C o-based catalysts are water tolerant [12] and modifying an Fe catalystw ith Co improvesc atalytic performance and selectivity towards C 2 + hydrocarbon products. [13,14] Improvements have also been made to Fe-based catalysts by adding Cu, which enhances CO 2 -FT activity and selectivity. [14] Although there are promising catalysts for CO 2 -FT,t he structure-property relationshipst hat control activity and selectivity to intermediate hydrocarbons are not well studied.…”

Section: Introductionmentioning

confidence: 99%

“…[13,14] Improvements have also been made to Fe-based catalysts by adding Cu, which enhances CO 2 -FT activity and selectivity. [14] Although there are promising catalysts for CO 2 -FT,t he structure-property relationshipst hat control activity and selectivity to intermediate hydrocarbons are not well studied. [15] Furthermore, because of the complexity of CO 2 -FT,t he alternative route of feeding CO produced from reverse water-gas shift (RWGS) into aF Treactor must also be considered.…”

Section: Introductionmentioning

confidence: 99%

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Potassium‐Promoted Molybdenum Carbide as a Highly Active and Selective Catalyst for CO₂ Conversion to CO

et al. 2017

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The high concentration of CO bound in seawater represents a significant opportunity to extract and use this CO as a C feedstock for synthetic fuels. Using an existing process, CO and H can be concurrently extracted from seawater and then catalytically reacted to produce synthetic fuel. Hydrogenating CO directly into liquid hydrocarbons is exceptionally difficult, but by first identifying a catalyst for selective CO production through the reverse water-gas shift (RWGS) reaction, CO can then be hydrogenated to fuel through Fischer-Tropsch (FT) synthesis. Results of this study demonstrate that potassium-promoted molybdenum carbide supported on γ-Al O (K-Mo C/γ-Al O ) is a low-cost, stable, and highly selective catalyst for RWGS over a wide range of conversions. These findings are supported by X-ray diffraction, scanning electron microscopy with energy-dispersive X-ray spectroscopy, X-ray photoelectron spectroscopy, and density functional theory calculations.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Potassium‐Promoted Molybdenum Carbide as a Highly Active and Selective Catalyst for CO₂ Conversion to CO

et al. 2017

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“…[1][2][3][4][5][6][7][8][9][10][11][12][13] The development of new catalytic systems capable of realizing the conversion of CO 2 to multi-carbon products (hydrocarbons or alcohols) at low or even ambient temperature is an attractive subject because such systems will not only provide high value products by consuming CO 2 , but also avoid over-emission of CO 2 in the conversion process. 3) and higher hydrocarbons from CO 2 and H 2 under low or even ambient temperature are realized for the first time over a prepared bimetallic catalyst composed of nanoparticles of Pt and Ru supported on Fe 3 O 4 (RuÀPt/Fe 3 O 4 ).…”

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confidence: 99%

Catalytic Conversion of CO₂ to Value‐Added Products under Mild Conditions

Huang

Wang

2018

ChemCatChem

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The catalytic synthesis of multi-carbon alcohols (MCA, C n H 2n + 1 OH, n ! 3) and higher hydrocarbons from CO 2 and H 2 under low or even ambient temperature are realized for the first time over a prepared bimetallic catalyst composed of nanoparticles of Pt and Ru supported on Fe 3 O 4 (RuÀPt/Fe 3 O 4 ). At 40 8C, the selectivity for alcohols, MCA, and higher hydrocarbons reached 77.1 %, 4.5 %, and 19.5 %, respectively, while that for methane was only 3.4 % (carbon based). As revealed by isotope tracer experiments using O 18 labeled water, in the hydrogenation of CO 2 over RuÀPt/Fe 3 O 4 , MCA could form by catalytic hydrolysis of alkyl, a novel reaction pathway enabling the formation of MCA at low temperature, which is different from the previously reported one based on CO insertion at high temperature. It was discovered that in RuÀPt/Fe 3 O 4 , both Ru and Pt nanoparticles played catalytic roles in the reduction of CO 2 to CH x species and the carbon-carbon coupling reaction to form alkyl, while the catalytic hydrolysis of formed long-chain alkyl occurred on Pt nanoparticles. CO 2 is a cheap, nontoxic, and abundant carbon source. The rising concentration of CO 2 in the atmosphere has been causing serious problems such as the greenhouse effect and ocean acidification. Therefore, the conversion of surplus CO 2 to hydrocarbon or oxygenated hydrocarbon is a significant subject. [1][2][3][4][5][6][7][8][9][10][11][12][13] The development of new catalytic systems capable of realizing the conversion of CO 2 to multi-carbon products (hydrocarbons or alcohols) at low or even ambient temperature is an attractive subject because such systems will not only provide high value products by consuming CO 2 , but also avoid over-emission of CO 2 in the conversion process. MCA with 3-8 carbon atoms are not only liquid fuels but also widely used as fine chemicals or solvents in producing pharmaceuticals, polymers, surfactants, detergents, paints, and printing inks. [14][15][16] The conversion of CO 2 and H 2 to multi-carbon compounds (CCMC) should be an ideal CO 2 conversion route, and H 2 can be manufactured in a large scale from renewable energy sources, including solar energy, hydropower and biomass.Pioneering efforts have been made to create catalytic systems for the conversion of CO 2 to multi-carbon compounds. It was reported that higher hydrocarbons could be synthesized from CO 2 and H 2 at high temperature over some heterogeneous catalysts. Song reported a FeÀCo bimetallic catalyst which could catalyze the reaction of CO 2 with H 2 to produce higher hydrocarbons with a selectivity of 69 % and a small amount of MCA at 300 8C. [17] Recently, Ge and Sun prepared an efficient catalyst Na-Fe 3 O 4 /HZSM-5 which can catalyze hydrogenation of CO 2 to produce hydrocarbons containing 78 % of gasoline-range (C 5 -C 11 ) ones at a CO 2 conversion of 22 % at 320 8C. [18] Sun et al. reported that a bifunctional catalyst composed of indium oxide (In 2 O 3 ) and zeolites could catalyze the reaction of CO 2 with H 2 to produce gasoline-r...

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Hydrogenation of Carbon Dioxide over K‐Promoted FeCo Bimetallic Catalysts Prepared from Mixed Metal Oxalates

et al. 2017

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The hydrogenation of carbon dioxide over K‐promoted FeCo bimetallic catalysts prepared by sequential oxalate decomposition and carburization of FeCo with CO was studied in a fixed‐bed reactor at 240 °C and 1.2 MPa. The initial CO2 conversion was found to be dependent on K loading, whereas both unpromoted and K‐promoted FeCo catalysts (except 90Fe10Co3.0K) exhibited similar levels of CO2 conversion after a few hours of time on stream. A decarburization study on freshly activated and used FeCo suggests that potassium increases the stability of iron carbides and graphitic carbon under a reducing atmosphere. Also, K addition tends to decrease the hydrogenation function of FeCo bimetallic catalysts and, thus, controls product selectivity. Under similar CO2 conversions, potassium enhanced acetic acid formation while suppressing ethanol production, which indicates that a common intermediate might be responsible for the changes observed with C2 oxygenates.

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Comparative Study on CO2 Hydrogenation to Higher Hydrocarbons over Fe-Based Bimetallic Catalysts

Cited by 86 publications

References 25 publications

Potassium‐Promoted Molybdenum Carbide as a Highly Active and Selective Catalyst for CO₂ Conversion to CO

Potassium‐Promoted Molybdenum Carbide as a Highly Active and Selective Catalyst for CO₂ Conversion to CO

Catalytic Conversion of CO₂ to Value‐Added Products under Mild Conditions

Hydrogenation of Carbon Dioxide over K‐Promoted FeCo Bimetallic Catalysts Prepared from Mixed Metal Oxalates

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Comparative Study on CO2 Hydrogenation to Higher Hydrocarbons over Fe-Based Bimetallic Catalysts

Cited by 86 publications

References 25 publications

Potassium‐Promoted Molybdenum Carbide as a Highly Active and Selective Catalyst for CO2 Conversion to CO

Potassium‐Promoted Molybdenum Carbide as a Highly Active and Selective Catalyst for CO2 Conversion to CO

Catalytic Conversion of CO2 to Value‐Added Products under Mild Conditions

Hydrogenation of Carbon Dioxide over K‐Promoted FeCo Bimetallic Catalysts Prepared from Mixed Metal Oxalates

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Potassium‐Promoted Molybdenum Carbide as a Highly Active and Selective Catalyst for CO₂ Conversion to CO

Potassium‐Promoted Molybdenum Carbide as a Highly Active and Selective Catalyst for CO₂ Conversion to CO

Catalytic Conversion of CO₂ to Value‐Added Products under Mild Conditions