Bimetallic catalysts for CO2 capture and hydrogenation at simulated flue gas conditions

Arellano-Treviño, Martha A.; Kanani, Nisarg; Jeong-Potter, Chae; Farrauto, Robert J.

doi:10.1016/j.cej.2019.121953

Cited by 139 publications

(92 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The catalyst and adsorbent loadings were the same, at 10 wt.%, while the CO 2 capture step was performed under an O 2 -free 9.5% CO 2 /N 2 gas flow. In a similar fashion to the findings of Bermejo-López et al [23,102], the authors showed that CaO sorbent led to greater CO 2 sorption capacity. However, the release of adsorbed CO 2 in the material with CaO sorbent was not fully reversible.…”

Section: Ni-based Dual-function Materialssupporting

confidence: 80%

“…A higher temperature activation step or the absence of O 2 from the CO 2 -containing gas are thus necessary prerequisites for the employment of Ni-based DFMs [21,112]. By promoting a Ni catalyst with a second metal though, its reducibility could be enhanced in order for it to meet the requirements to be used under more practical flue-gas applications [23].…”

Section: Alkali and Alkaline Earth Metals As Active Sorbents Phases Imentioning

confidence: 99%

“…Following their earlier work, Arellano-Treviño et al [23] attempted to enhance the Ni-based material's reducibility by introducing small amounts (0.1 and 1 wt.%) of noble metals Ru, Pt and Pd. Pd-containing samples exhibited comparatively inferior performance, whereas the beneficial effect of Pt and Ru addition rested on the enhancement of NiO reducibility under 13.26% H 2 /N 2 flow at 320 • C. 1 wt.% Pt addition caused 50% of the initially oxidized NiO to be reduced, while this value for the promotion with 1 wt.% Ru reached 70%.…”

Section: Ni-based Dual-function Materialsmentioning

confidence: 99%

See 2 more Smart Citations

The Role of Alkali and Alkaline Earth Metals in the CO2 Methanation Reaction and the Combined Capture and Methanation of CO2

et al. 2020

View full text Add to dashboard Cite

CO2 methanation has great potential for the better utilization of existing carbon resources via the transformation of spent carbon (CO2) to synthetic natural gas (CH4). Alkali and alkaline earth metals can serve both as promoters for methanation catalysts and as adsorbent phases upon the combined capture and methanation of CO2. Their promotion effect during methanation of carbon dioxide mainly relies on their ability to generate new basic sites on the surface of metal oxide supports that favour CO2 chemisorption and activation. However, suppression of methanation activity can also occur under certain conditions. Regarding the combined CO2 capture and methanation process, the development of novel dual-function materials (DFMs) that incorporate both adsorption and methanation functions has opened a new pathway towards the utilization of carbon dioxide emitted from point sources. The sorption and catalytically active phases on these types of materials are crucial parameters influencing their performance and stability and thus, great efforts have been undertaken for their optimization. In this review, we present some of the most recent works on the development of alkali and alkaline earth metal promoted CO2 methanation catalysts, as well as DFMs for the combined capture and methanation of CO2.

show abstract

Section: Ni-based Dual-function Materialssupporting

confidence: 80%

Section: Alkali and Alkaline Earth Metals As Active Sorbents Phases Imentioning

confidence: 99%

Section: Ni-based Dual-function Materialsmentioning

confidence: 99%

See 1 more Smart Citation

The Role of Alkali and Alkaline Earth Metals in the CO2 Methanation Reaction and the Combined Capture and Methanation of CO2

et al. 2020

View full text Add to dashboard Cite

show abstract

“…Having Ni active methanation phase in DFMs presents a major problem, since Ni is deactivated during the CO 2 capture step from flue gases and cannot be reactivated under H 2 flow at the usual operation temperature of 320 • C [21,103]. Adding just 1% Ru in a DFM consisting of 10% Ni increased the reducibility of the Ni phase by 70% and thus enabled CH 4 production under isothermal cyclic operation [104]. Employing in-situ DRIFTS, it was shown that both Ru and Ni are active sites for the methanation reaction, with bicarbonate and bidentate carbonate intermediate species spilling over to both metals before being hydrogenated into CH 4 [105].…”

Section: Promotion With Rumentioning

confidence: 99%

Bimetallic Ni-Based Catalysts for CO2 Methanation: A Review

et al. 2020

View full text Add to dashboard Cite

CO2 methanation has recently emerged as a process that targets the reduction in anthropogenic CO2 emissions, via the conversion of CO2 captured from point and mobile sources, as well as H2 produced from renewables into CH4. Ni, among the early transition metals, as well as Ru and Rh, among the noble metals, have been known to be among the most active methanation catalysts, with Ni being favoured due to its low cost and high natural abundance. However, insufficient low-temperature activity, low dispersion and reducibility, as well as nanoparticle sintering are some of the main drawbacks when using Ni-based catalysts. Such problems can be partly overcome via the introduction of a second transition metal (e.g., Fe, Co) or a noble metal (e.g., Ru, Rh, Pt, Pd and Re) in Ni-based catalysts. Through Ni-M alloy formation, or the intricate synergy between two adjacent metallic phases, new high-performing and low-cost methanation catalysts can be obtained. This review summarizes and critically discusses recent progress made in the field of bimetallic Ni-M (M = Fe, Co, Cu, Ru, Rh, Pt, Pd, Re)-based catalyst development for the CO2 methanation reaction.

show abstract

“…Therefore, efficient measures have to be made to reduce atmospheric CO 2 levels, such as reducing the direct emission of CO 2 by developing clean and sustainable energy resources to replace traditional fossil fuels, capturing and storing CO 2 , and converting the anthropogenic CO 2 into useful chemicals or fuels by reducing it. Among them, the efficient conversion of CO 2 has attracted great consideration because of the fact that it is the most abundant C1 compound and is the major greenhouse gas [ 4 , 5 , 6 , 7 ]. The conversion of CO 2 to value-added fuels or chemicals is important in recycling carbon species and simultaneously solving environmental problems and energy crises.…”

Section: Introductionmentioning

confidence: 99%

Research Progress in Conversion of CO2 to Valuable Fuels

Xiu

Liu

et al. 2020

Molecules

View full text Add to dashboard Cite

Rapid growth in the world’s economy depends on a significant increase in energy consumption. As is known, most of the present energy supply comes from coal, oil, and natural gas. The overreliance on fossil energy brings serious environmental problems in addition to the scarcity of energy. One of the most concerning environmental problems is the large contribution to global warming because of the massive discharge of CO2 in the burning of fossil fuels. Therefore, many efforts have been made to resolve such issues. Among them, the preparation of valuable fuels or chemicals from greenhouse gas (CO2) has attracted great attention because it has made a promising step toward simultaneously resolving the environment and energy problems. This article reviews the current progress in CO2 conversion via different strategies, including thermal catalysis, electrocatalysis, photocatalysis, and photoelectrocatalysis. Inspired by natural photosynthesis, light-capturing agents including macrocycles with conjugated structures similar to chlorophyll have attracted increasing attention. Using such macrocycles as photosensitizers, photocatalysis, photoelectrocatalysis, or coupling with enzymatic reactions were conducted to fulfill the conversion of CO2 with high efficiency and specificity. Recent progress in enzyme coupled to photocatalysis and enzyme coupled to photoelectrocatalysis were specially reviewed in this review. Additionally, the characteristics, advantages, and disadvantages of different conversion methods were also presented. We wish to provide certain constructive ideas for new investigators and deep insights into the research of CO2 conversion.

show abstract

Bimetallic catalysts for CO2 capture and hydrogenation at simulated flue gas conditions

Cited by 139 publications

References 29 publications

The Role of Alkali and Alkaline Earth Metals in the CO2 Methanation Reaction and the Combined Capture and Methanation of CO2

The Role of Alkali and Alkaline Earth Metals in the CO2 Methanation Reaction and the Combined Capture and Methanation of CO2

Bimetallic Ni-Based Catalysts for CO2 Methanation: A Review

Research Progress in Conversion of CO2 to Valuable Fuels

Contact Info

Product

Resources

About