CO2 hydrogenation to higher hydrocarbons on K/Fe–Al–O spinel catalysts promoted with Si, Ti, Zr, Hf, Mn and Ce

Samanta, Anupam; Landau, Miron V.; Vidruk-Nehemya, Roxana; Herskowitz, M.

doi:10.1039/c7cy01118k

Cited by 30 publications

(27 citation statements)

References 59 publications

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“…Dorner et al observed that the addition of ceria to a Fe/Mn/K-alumina catalyst significantly improved performances for the hydrogenation of CO 2 to C 2 -C 5 olefins, due to ceria promotion of the RWGS reaction. A similar approach has been described by Samanta et al who added 5% Ce on a K/Fe-Al-O spinel observing an increase in selectivity for methane and light C 2 -C 4 with respect to the undoped catalyst (Samanta et al, 2017). Xie et al instead tested successfully a composite material constituted by a Pt/CeO 2 core (RWGS functionality) surrounded by a Co-mesoporous silica shell (FT functionality) (Xie C. et al, 2017).…”

Section: Co2 Hydrogenation To Value Added Chemicals Other Than Methanementioning

confidence: 91%

“…An ideal catalyst for this process should be active for both RWGS and FT synthesis, thus making its design quite complicated (Porosoff et al, 2016; Guo et al, 2018; Li and van Veen, 2018). To overcome this issue, the approach is that of designing bifunctional catalysts that couple both RWGS and FT functionalities in a single material, and a few attempts have been made also with ceria-containing formulations (Dorner et al, 2011; Samanta et al, 2017; Xie C. et al, 2017). Dorner et al observed that the addition of ceria to a Fe/Mn/K-alumina catalyst significantly improved performances for the hydrogenation of CO 2 to C 2 -C 5 olefins, due to ceria promotion of the RWGS reaction.…”

Section: Co2 Hydrogenation To Value Added Chemicals Other Than Methanementioning

confidence: 99%

“…This last effect is attributed to the capability of saturating the hydrocarbon chain, higher for the more reducible support (i.e., ceria nanorods) on which paraffin's production is favored. Also the strength of CO 2 bonding on ceria has been demonstrated to affect the selectivity of ceria-containing catalysts (Samanta et al, 2017).…”

Section: Co2 Hydrogenation To Value Added Chemicals Other Than Methanementioning

confidence: 99%

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Ceria-Based Materials in Hydrogenation and Reforming Reactions for CO2 Valorization

2019

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Reducing greenhouse emissions is of vital importance to tackle the climate changes and to decrease the carbon footprint of modern societies. Today there are several technologies that can be applied for this goal and especially there is a growing interest in all the processes dedicated to manage CO 2 emissions. CO 2 can be captured, stored or reused as carbon source to produce chemicals and fuels through catalytic technologies. This study reviews the use of ceria based catalysts in some important CO 2 valorization processes such as the methanation reaction and methane dry-reforming. We analyzed the state of the art with the aim of highlighting the distinctive role of ceria in these reactions. The presence of cerium based oxides generally allows to obtain a strong metal-support interaction with beneficial effects on the dispersion of active metal phases, on the selectivity and durability of the catalysts. Moreover, it introduces different functionalities such as redox and acid-base centers offering versatility of approaches in designing and engineering more powerful formulations for the catalytic valorization of CO 2 to fuels.

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Section: Co2 Hydrogenation To Value Added Chemicals Other Than Methanementioning

confidence: 91%

Section: Co2 Hydrogenation To Value Added Chemicals Other Than Methanementioning

confidence: 99%

Section: Co2 Hydrogenation To Value Added Chemicals Other Than Methanementioning

confidence: 99%

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Ceria-Based Materials in Hydrogenation and Reforming Reactions for CO2 Valorization

2019

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“…The mechanism of the formation of С2+ hydrocarbons during hydrogenation of СО2 is described through the intermediate formation of methanol and without the stage of methanol formation [110,111]. Hydrogenation of СО2 through intermediate methanol occurs in the presence of mainly copper-zinc catalysts with the formation of light alkanes as the main products with hydrogenation of alkenes [112,113]. According to the second mechanism, CO2 hydrogenation proceeds in two stages: the stage of the reverse reaction of the conversion of water gas (OCWG) and the Fischer-Tropsch synthesis (FT).…”

Section: Mechanism Of Co2 Hydrogenation To Hydrocarbonsmentioning

confidence: 99%

Heterogeneous Catalytic Hydrogenation of Carbon Dioxide Into Hydrocarbons: Achievements and Prospects

Tagiyeva¹,

Ismailov²

2020

Chemical Problems

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The works published over the past 10 years on the catalytic hydrogenation of carbon dioxide into methane and C2+ hydrocarbons are considered. The choice of catalysts based on their elemental and phase composition, structural-porous characteristics, grain-size and acidic properties, the reaction mechanism and problems and prospects for the industrial application of heterogeneous catalytic conversion of CO2 to hydrocarbons are discussed.

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“…Metal oxides can also serve as structural and electronic promoters 68 . It was reported that SiO2, TiO2, ZrO2, HfO2, CeO2 and MnO2 might modify the texture and surface reactivity of The alkane selectivity was calculated based on all products except CO.…”

Section: Promotersmentioning

confidence: 99%

Heterogeneous Catalysis of CO2 Hydrogenation to C2+ Products

Gao¹,

Liu²,

Zhao³

et al. 2018

Acta Physico-Chimica Sinica

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The increasing anthropogenic emission of CO2 leads to global warming, to address which three strategies can be considered: (1) decrease fossil fuel consumption through increased utilization efficiency and lower per capita consumption;(2) replace fossil fuels with renewable energy sources like wind, tidal, solar, and biomass energies; (3) utilize CO2 efficiently. Despite efforts to reduce energy use and increase the use of carbon-neutral biofuels, it seems that fossil fuels will continue to be a major energy source for the next few decades. Tremendous effort is therefore being focused on developing effective technologies for CO2 capture and transformation. In particular, the transformation of CO2 into fuels and chemicals via reduction with renewable hydrogen is a promising strategy for mitigating global warming and energy supply problems. The hydrogenation of CO2, especially to C2+ hydrocarbons and oxygenates, has sparked growing interest. The C2+ species can be used as entry platform chemicals for existing value chains, thus providing more advantages than C1 compounds. However, optimizing catalyst design by integrating multifunctionalities for both CO2 activation and C-C coupling remains an ongoing challenge. Here, we provide a timely review on the recent progress that has been made in the hydrogenation of CO2 to higher-order alkanes, olefins, and alcohols by various heterogeneous catalysts. The thermodynamics and kinetics, as well as possible reaction pathways for CO2 hydrogenation, are discussed. The hydrogenation of CO2 to hydrocarbons usually involves the initial generation of CO via a reverse water-gas shift (RWGS) reaction followed by hydrogenation of the CO intermediate. The RWGS reaction proceeds through a redox route and an associative pathway. "CHx" insertion (carbide-type) and "CO" insertion are two proposed mechanisms for this Fischer-Tropsch-like synthesis. Fe-or Co-based catalysts have been widely used to catalyze the hydrogenation of CO2 to C2+ hydrocarbons via the CO intermediate. C2+ hydrocarbons can also be obtained by combining CH3OH synthesis with the methanol-to-hydrocarbon process (MTH). This reaction pathway has been realized over bifunctional systems comprising a CH3OH synthesis catalyst and an MTH catalyst. Alternatively, CO2 hydrogenation can occur via a RWGS reaction to the CO intermediate, and subsequent formation of higher alcohols from syngas. Higher alcohols (mostly CH3CH2OH) have been produced by using a hybrid tandem catalyst. Understanding of the activation mechanism, precise C-C coupling, and synergy control between the two active components requires further research. In the final part, we describe the future challenges and opportunities in heterogeneous catalysis of CO2 hydrogenation. The combination of calculations (precise theoretical models) and experiments (in-situ spectroscopic techniques) will facilitate the design of advanced catalysts to achieve both high CO2 conversion and C2+ product selectivity.

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CO₂ hydrogenation to higher hydrocarbons on K/Fe–Al–O spinel catalysts promoted with Si, Ti, Zr, Hf, Mn and Ce

Abstract: Si and Zr species grafted on Fe–Al–O catalysts act as an inhibitor and promoter, respectively, in CO2 hydrogenation.

Cited by 30 publications

References 59 publications

Ceria-Based Materials in Hydrogenation and Reforming Reactions for CO2 Valorization

Ceria-Based Materials in Hydrogenation and Reforming Reactions for CO2 Valorization

Heterogeneous Catalytic Hydrogenation of Carbon Dioxide Into Hydrocarbons: Achievements and Prospects

Heterogeneous Catalysis of CO<sub>2</sub> Hydrogenation to C<sub>2+</sub> Products

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