Methanation of carbon monoxide and carbon dioxide over nickel catalyst under the transient state

Fujita, Shin‐ichiro; Terunuma, Hiroyuki; Kobayashi, Haruo; Takezawa, Nobutsune

doi:10.1007/bf02066720

Cited by 44 publications

(28 citation statements)

References 8 publications

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“…[90][91][92][93][94] The other one involves the direct hydrogenation of CO 2 to methane without forming CO as intermediate. 95,96 We note that, even for CO methanation, there is still no consensus on the kinetics and mechanism. It has been proposed that the rate-determining step is either the formation of the CH x O intermediate and its hydrogenation or the formation of surface carbon in CO dissociation and its interaction with hydrogen.…”

Section: Reaction Mechanismmentioning

confidence: 93%

Recent advances in catalytic hydrogenation of carbon dioxide

et al. 2011

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Owing to the increasing emissions of carbon dioxide (CO 2 ), human life and the ecological environment have been affected by global warming and climate changes. To mitigate the concentration of CO 2 in the atmosphere various strategies have been implemented such as separation, storage, and utilization of CO 2 . Although it has been explored for many years, hydrogenation reaction, an important representative among chemical conversions of CO 2 , offers challenging opportunities for sustainable development in energy and the environment. Indeed, the hydrogenation of CO 2 not only reduces the increasing CO 2 buildup but also produces fuels and chemicals. In this critical review we discuss recent developments in this area, with emphases on catalytic reactivity, reactor innovation, and reaction mechanism. We also provide an overview regarding the challenges and opportunities for future research in the field (319 references).

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Section: Reaction Mechanismmentioning

confidence: 93%

Recent advances in catalytic hydrogenation of carbon dioxide

et al. 2011

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“…The first one involves the conversion of CO 2 to CO prior to methanation, and the subsequent reaction follows the same mechanism as CO methanation [16,[54][55][56]. The other one involves the direct hydrogenation of CO 2 to methane without the formation of CO as intermediate [57,58]. Note that, even for CO methanation, there is still no consensus on the kinetics and mechanism.…”

Section: Reaction Mechanismsmentioning

confidence: 99%

Methanation of carbon dioxide: an overview

Wang

Gong

2010

Front. Chem. Sci. Eng.

475

184

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Although being very challenging, utilization of carbon dioxide (CO 2 ) originating from production processes and flue gases of CO 2 -intensive sectors has a great environmental and industrial potential due to improving the resource efficiency of industry as well as by contributing to the reduction of CO 2 emissions. As a renewable and environmentally friendly source of carbon, catalytic approaches for CO 2 fixation in the synthesis of chemicals offer the way to mitigate the increasing CO 2 buildup. Among the catalytic reactions, methanation of CO 2 is a particularly promising technique for producing energy carrier or chemical. This article focuses on recent developments in catalytic materials, novel reactors, and reaction mechanism for methanation of CO 2 .

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“…A small stream of product gas was sent to the mass spectrometer, and mass numbers 44,40,28,18,15,4,3, and 2 were assigned to carbon dioxide, argon, carbon monoxide, water, methane, deuterium, HD, and hydrogen, respectively, with appropriate subtractions for overlapping mass numbers. A small stream of product gas was sent to the mass spectrometer, and mass numbers 44,40,28,18,15,4,3, and 2 were assigned to carbon dioxide, argon, carbon monoxide, water, methane, deuterium, HD, and hydrogen, respectively, with appropriate subtractions for overlapping mass numbers.…”

Section: Reactorsmentioning

confidence: 99%

CO₂methanation by Ru-doped ceria: the role of the oxidation state of the surface

Upham

Derk

Sharma

et al. 2015

Catal. Sci. Technol.

106

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Ru 0.05 Ce 0.95 O x is an active catalyst for methanation of CO 2 with H 2 . Under reaction conditions one expects that oxygen vacancies are present on the oxide catalyst surface and that their steady-state concentration depends upon the relative ratio of the oxidant (CO 2 ) to the reductant (H 2 ). We show that the activity of the catalyst is sensitive to the degree of surface reduction: a surface that is too reduced or too oxidized loses activity. Exposing the oxidized surface to CO 2 and then to H 2 produces no methane, while on a reduced surface methane is produced by exposure to CO 2 followed by H 2 . If the reaction is carried out at the steady state, purged, and then exposed to only hydrogen, methane is produced. Methane is formed through the reaction of hydrogen with surface species, whose infrared spectrum is associated with a variety of surface carbonates, and not through CO or a formate intermediate.

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Methanation of carbon monoxide and carbon dioxide over nickel catalyst under the transient state

Cited by 44 publications

References 8 publications

Recent advances in catalytic hydrogenation of carbon dioxide

Recent advances in catalytic hydrogenation of carbon dioxide

Methanation of carbon dioxide: an overview

CO₂methanation by Ru-doped ceria: the role of the oxidation state of the surface

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Methanation of carbon monoxide and carbon dioxide over nickel catalyst under the transient state

Cited by 44 publications

References 8 publications

Recent advances in catalytic hydrogenation of carbon dioxide

Recent advances in catalytic hydrogenation of carbon dioxide

Methanation of carbon dioxide: an overview

CO2methanation by Ru-doped ceria: the role of the oxidation state of the surface

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CO₂methanation by Ru-doped ceria: the role of the oxidation state of the surface