Insight into CO2 methanation mechanism over NiUSY zeolites: An operando IR study

Westermann, Alexandre; Azambre, B.; Bacariza, M.C.; Graça, Inês; Ribeiro, M.F.; Lopes, J.M.; Henriques, Carlos

doi:10.1016/j.apcatb.2015.02.026

Cited by 231 publications

(142 citation statements)

References 32 publications

(59 reference statements)

Supporting

Mentioning

126

Contrasting

Unclassified

Order By: Relevance

“…In addition, evidently stronger bands at 1603 and 1368 cm −1 were observed over NiWMgO x than those on undoped NiMgO x . Several formate and carbonate species were observed over Nibased catalysts in the DRIFTS spectra between 1700 and 1200 cm −1 during the methanation of CO 2 [34,36,37]. For formate species over Ni-based catalysts, the adsorption configuration is distinguished by the frequency difference ( v) between s (OCO) and as (OCO).…”

Section: In Situ Drifts Studymentioning

confidence: 99%

“…CO was observed as an impurity for CO 2 in certain sources such as waste gas emission from power plants [33,34], the pres- ence of which was reported to inhibit the methanation of CO 2 by strong interaction with the surface of Ni particles [35]. Fig.…”

Section: Influence Of Comentioning

confidence: 99%

“…For the assignment of the bands at 1511, 1445 and 1380 cm −1 , different kinds of carbonates have been proposed, including monodentate carbonate [39], bidentate carbonate [36,37] and tridentate carbonate [40]. In the presence of H 2 , carbonates can be hydrogenated into formate species and further participated in the methane production [11,34]. Also the direct decomposition of carbonates has been proposed in this process, resulting in the possible formation of CO besides from CO 2 , which then followed the reaction pathway of the methanation of CO to yield methane [41].…”

Section: In Situ Drifts Studymentioning

confidence: 99%

See 2 more Smart Citations

A novel W-doped Ni-Mg mixed oxide catalyst for CO2 methanation

Yan

Dai

et al. 2016

Applied Catalysis B: Environmental

168

View full text Add to dashboard Cite

a b s t r a c tNovel Ni-W-Mg mixed oxide catalysts (NiWMgO x ) were prepared by homogeneous precipitation and attempted for the methanation of CO 2 . Adding W remarkably promoted the activity with improved stability, anti-CO-poisoning ability and resistance against coke formation compared to the undoped NiMgO x catalyst. The superior reactivity of monodentate formate towards hydrogenation than that of bidentate formate species was identified by DRIFTS analysis and the formation of more active monodentate formate species was indisputably facilitated by W additives, leading to the greatly enhanced catalytic activity. H 2 -TPR and CO 2 -TPD characterization showed that doping W increased the number of stable CO 2 adsorption sites and helped in anchoring the Ni sites as a result of strengthened Ni-Mg interaction, both of which were responsible for the enhanced CO 2 methanation activity and the improved resistance against sintering.

show abstract

Section: In Situ Drifts Studymentioning

confidence: 99%

Section: Influence Of Comentioning

confidence: 99%

Section: In Situ Drifts Studymentioning

confidence: 99%

See 1 more Smart Citation

A novel W-doped Ni-Mg mixed oxide catalyst for CO2 methanation

Yan

Dai

et al. 2016

Applied Catalysis B: Environmental

168

View full text Add to dashboard Cite

show abstract

“…The "operando" IR spectroscopy technique was also used to get a better insight into the mechanism of the reaction. According to [111], dissociated hydrogen reacts with carbonates and/or physisorbed CO 2 , giving rise firstly to formation of monodentate formates, then carbonyls, and finally to CH 4 .…”

Section: Alumina-supported Nickelmentioning

confidence: 99%

Supported Catalysts for CO2 Methanation: A Review

et al. 2017

View full text Add to dashboard Cite

CO 2 methanation is a well-known reaction that is of interest as a capture and storage (CCS) process and as a renewable energy storage system based on a power-to-gas conversion process by substitute or synthetic natural gas (SNG) production. Integrating water electrolysis and CO 2 methanation is a highly effective way to store energy produced by renewables sources. The conversion of electricity into methane takes place via two steps: hydrogen is produced by electrolysis and converted to methane by CO 2 methanation. The effectiveness and efficiency of power-to-gas plants strongly depend on the CO 2 methanation process. For this reason, research on CO 2 methanation has intensified over the last 10 years. The rise of active, selective, and stable catalysts is the core of the CO 2 methanation process. Novel, heterogeneous catalysts have been tested and tuned such that the CO 2 methanation process increases their productivity. The present work aims to give a critical overview of CO 2 methanation catalyst production and research carried out in the last 50 years. The fundamentals of reaction mechanism, catalyst deactivation, and catalyst promoters, as well as a discussion of current and future developments in CO 2 methanation, are also included.

show abstract

“…So far, few works have been published dealing with the use of micro and mesoporous materials as supports for Ni-based CO2 and CO methanation catalysts [6][7][8][9][10][11][12][13][14][15][16][17] , the mainly used being USY zeolite, SBA-15 and MCM-41. Ni-based USY zeolite catalysts showed interesting performances towards methanation being reported the effect of Ni content, Ce addition, the preparation method conditions and some highlights concerning the reaction mechanism 6,[17][18][19] . In addition, SBA-15 and MCM-41 mesoporous materials were used due to their large pore sizes and interesting textural properties for the dispersion of metal species and the prevention of sintering processes.…”

Section: Introductionmentioning

confidence: 99%

Micro- and mesoporous supports for CO2 methanation catalysts: A comparison between SBA-15, MCM-41 and USY zeolite

Bacariza

Graça

Bebiano

et al. 2018

Chemical Engineering Science

Self Cite

111

View full text Add to dashboard Cite

This version is available at https://strathprints.strath.ac.uk/62298/ Strathprints is designed to allow users to access the research output of the University of Strathclyde. Unless otherwise explicitly stated on the manuscript, Copyright © and Moral Rights for the papers on this site are retained by the individual authors and/or other copyright owners. Please check the manuscript for details of any other licences that may have been applied. You may not engage in further distribution of the material for any profitmaking activities or any commercial gain. You may freely distribute both the url (https://strathprints.strath.ac.uk/) and the content of this paper for research or private study, educational, or not-for-profit purposes without prior permission or charge.Any correspondence concerning this service should be sent to the Strathprints administrator: strathprints@strath.ac.ukThe Strathprints institutional repository (https://strathprints.strath.ac.uk) is a digital archive of University of Strathclyde research outputs. It has been developed to disseminate open access research outputs, expose data about those outputs, and enable the management and persistent access to Strathclyde's intellectual output. All the results are comparable to the obtained using a HNaUSY zeolite with Si/Al=2.8 as support. Cerium incorporation on Ni/mesoporous supports allowed enhancing the CO2 conversion, especially at lower temperatures, as already reported for the zeolite-based samples.

show abstract

Insight into CO2 methanation mechanism over NiUSY zeolites: An operando IR study

Cited by 231 publications

References 32 publications

A novel W-doped Ni-Mg mixed oxide catalyst for CO2 methanation

A novel W-doped Ni-Mg mixed oxide catalyst for CO2 methanation

Supported Catalysts for CO2 Methanation: A Review

Micro- and mesoporous supports for CO2 methanation catalysts: A comparison between SBA-15, MCM-41 and USY zeolite

Contact Info

Product

Resources

About