Mechanism of iron-catalyzed water vapour gasification of carbon

Hermann, Günter; Hüttinger, Klaus J.

doi:10.1016/0008-6223(86)90263-0

Cited by 37 publications

(15 citation statements)

References 9 publications

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“…[23] In this case, to investigate this hypothesis, 13 C-labeled iron carbide NPs werereacted with H 2 O Figure 3. NMR spectraafter FT reaction (500 MHz).…”

Section: Resultsmentioning

confidence: 99%

A New Approach to the Mechanism of Fischer–Tropsch Syntheses Arising from Gas Phase NMR and Mass Spectrometry

et al. 2016

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We used 13CO labeling to show that gas‐phase NMR spectroscopy and mass spectrometry are simple tools for mechanistic investigations of the Fischer–Tropsch (FT) reaction. Thus, monodisperse Fe nanoparticles (NPs) react with syngas to form monodisperse iron carbide (FeCx) NPs. As expected, the heating of 13C‐labeled monodisperse FeCx NPs under H2 results in the desorption of the carbide carbons as 13CH4 and, interestingly, restores the initial Fe NPs in terms of size and dispersity. The Fe13Cx NPs catalyze the hydrogenation of 12CO at 210 °C to yield only 12C‐labeled FT products, which evidences the absence of the incorporation of FeCx carbon atoms in the products. In addition, this approach shows for the first time that the formation of 13CH4 at 250 °C does not result from direct carbide hydrogenation but from an intermediate step that involves a reaction between Fe13Cx and H2O to give 13CO2, which is subsequently hydrogenated. These results rule out the involvement of FeCx carbon atoms in the chain growth process under our conditions.

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“…[23] In this case, to investigate this hypothesis, 13 C-labeled iron carbide NPs werereacted with H 2 O Figure 3. NMR spectraafter FT reaction (500 MHz).…”

Section: Resultsmentioning

confidence: 99%

A New Approach to the Mechanism of Fischer–Tropsch Syntheses Arising from Gas Phase NMR and Mass Spectrometry

et al. 2016

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“…The equation (2.5.b) is the catalytic reduction reaction and hence it is the rate-determining step as explained by Hermann and Huttinger, [91]. In fact, CO 2 is believed to be the oxidizing agent of some mineral phases present in the coal such as metallic iron (Fe), pyrrhotite (Fe 1 À x S), and oldhamite (CaS).…”

Section: Effect Of Catalyst (Minerals)mentioning

confidence: 97%

Coal gasification in CO2 atmosphere and its kinetics since 1948: A brief review

Irfan

Usman

Kusakabe

2011

Energy

434

229

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“…This is probably due to the oxidation action of Fe(III) salt which plays a role as an activating agent for carbon materials[36][37][38][39][40][41]. Oliveira et al[41] found that AC obtained with ferric salt as activating agent shows high specific surface area even at lower activation temperatures (280 • C).…”

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confidence: 97%