Structural evolution of bimetallic Co-Cu catalysts in CO hydrogenation to higher alcohols at high pressure

Göbel, Christoph; Schmidt, Stefan; Froese, Christian; Fu, Qi; Chen, Yen‐Ting; Pan, Qing; Mühler, Martin

doi:10.1016/j.jcat.2020.01.004

Cited by 47 publications

(59 citation statements)

References 32 publications

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“…However, an increase of CO 2 selectivity with increasing proportion of copper, which is more active than cobalt with respect to the water‐gas shift reaction , , could not be observed. This, in turn, might be explained by the formation of a core‐shell structure of the bimetallic metal particles with cobalt forming the shell as described in different studies on Co‐Cu‐catalytic systems , .…”

Section: Resultsmentioning

confidence: 99%

Development of Co‐Cu‐C‐Mn Catalysts for the Synthesis of Higher Alcohols

Wiesmann

Reinsdorf

Lohmann

et al. 2020

Chemie Ingenieur Technik

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Co‐Cu catalysts represent a promising possibility to synthesize higher alcohols. In this study, novel carbon‐embedded Co‐Cu catalysts have been prepared and were tested in an 8‐fold parallel reactor system. Moreover, the influence of Mn as a dopant on the catalytic performance has been studied. It was shown that Mn reduced the selectivity for methane and favored the formation of olefins. In contrast to Cu‐free catalysts, Cu‐containing catalysts have an improved selectivity for alcohols.

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Section: Resultsmentioning

confidence: 99%

Development of Co‐Cu‐C‐Mn Catalysts for the Synthesis of Higher Alcohols

Wiesmann

Reinsdorf

Lohmann

et al. 2020

Chemie Ingenieur Technik

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“…It shifts selectivity through the molecular binding of CO on its surface. 67,[86][87][88] Cobalt supported on almond AC shows lower alcohol selectivity than supported on AC made from coconut shells. 33 Syngas conversion and CH 4 selectivity increase and the content of the C 12 -C 20 hydrocarbons in the liquid organic product decreases as Co loading amount rises from 7 to 20 wt%.…”

Section: Activated Carbon Supported Cobalt Catalystsmentioning

confidence: 99%

“…95 However, some studies later found that the Co 2 C phases formed in situ during FTS were influential in tuning selectivity. 87,88 The AC supports can facilitate the formation of Co 2 C species, and thus promote high alcohol selectivity. 82 The formed Co 2 C species combined with Co generate a synergistic effect in FTS that can extend beyond higher alcohols production, as shown by recent studies on facet dependent activity of Co 2 C. 96,97 The interface between Co 2 C and Co provides active sites for the production of the high alpha-alcohols, as shown in Fig.…”

Section: Activated Carbon Supported Cobalt Catalystsmentioning

confidence: 99%

Carbon-based catalysts for Fischer–Tropsch synthesis

et al. 2021

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“…It is important to note that the oxidation of carriers during cycles in a CO 2 atmosphere is accompanied by the production of toxic CO. However, due to much higher reactivity of carbon monoxide than carbon dioxide, this monoxide is helpful in the synthesis of useful organic products, for example in Fischer-Tropsch process [31][32][33]. Then CO does not have to be emitted into the atmosphere.…”

Section: Conceptual Modification Of Clc and Cldr Processesmentioning

confidence: 99%

Chemical Looping Combustion Related Processes Using Solid Oxygen Carriers Oxidized in CO₂ Atmosphere

Psiuk

Wojsa

Gerle

et al. 2020

Ecological Chemistry and Engineering S

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Chemical-looping combustion (CLC) is an attractive process in CO2 capture, especially when solid oxygen carriers are used in it. The main requirements for oxygen-transporting materials include appropriate oxidation (in air) and reduction (in the presence of fuel) ability. In the paper a conceptual proposition for CLC-related processes with the application of solid oxygen carriers oxidized in both air and CO2 atmosphere has been presented. The possibility of the “looping” process on the same carriers using both CO2 and air atmosphere as an oxidizing agent allows us to enrich the concept of CLC and related processes by proposing a cyclic recirculation of the produced CO2 back to the installation. The oxidizing of solid oxygen carrier in a CO2 atmosphere is accompanied by CO emission from the plant. This toxic gas could be transformed into a useful product in any chemical process. It is possible to combine the looping processes with manufacturing of any appropriate morphological form of carbon in the cyclic CO disproportionation process. The combined process could lead to a lower CO2 emissions to the environment. SrTiO3 doped by Cr (STO:Cr) and a mixture of TiO2- and Ni-based compounds (TiO2-Ni) were investigated as oxygen transporting materials. The experiment methodology based on thermogravimetric, diffraction and spectroscopic studies was shown. Thermogravimetric (TGA) and Powder Diffraction (XRD) measurements were provided in-situ during a few cycles in a reducing (Ar+3 % H2) and oxidizing environment. Moreover, the STO:Cr powders were characterized ex-situ by the X-ray Photoelectron Spectroscopy (XPS) method. It was found that in tested conditions the cyclic process of the investigated powders’ oxidation and reduction is possible. Satisfactory results considering the oxygen transport capacity was obtained for the TiO2-Ni sample.

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Structural evolution of bimetallic Co-Cu catalysts in CO hydrogenation to higher alcohols at high pressure

Cited by 47 publications

References 32 publications

Development of Co‐Cu‐C‐Mn Catalysts for the Synthesis of Higher Alcohols

Development of Co‐Cu‐C‐Mn Catalysts for the Synthesis of Higher Alcohols

Carbon-based catalysts for Fischer–Tropsch synthesis

Chemical Looping Combustion Related Processes Using Solid Oxygen Carriers Oxidized in CO₂ Atmosphere

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Structural evolution of bimetallic Co-Cu catalysts in CO hydrogenation to higher alcohols at high pressure

Cited by 47 publications

References 32 publications

Development of Co‐Cu‐C‐Mn Catalysts for the Synthesis of Higher Alcohols

Development of Co‐Cu‐C‐Mn Catalysts for the Synthesis of Higher Alcohols

Carbon-based catalysts for Fischer–Tropsch synthesis

Chemical Looping Combustion Related Processes Using Solid Oxygen Carriers Oxidized in CO2 Atmosphere

Contact Info

Product

Resources

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Chemical Looping Combustion Related Processes Using Solid Oxygen Carriers Oxidized in CO₂ Atmosphere