The calcium looping cycle for large-scale CO2 capture

Blamey, John; Anthony, Edward J.; Wang, J.; Fennell, Paul S.

doi:10.1016/j.pecs.2009.10.001

Cited by 900 publications

(760 citation statements)

References 134 publications

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“…For example, calcium looping cycle has been proposed for the improvement of hydrogen production in the processes of water-gas shift reaction [10] or methane steam reforming (so called sorption enhanced reforming SER) which has been verified both in fluidized [11] and fixed bed reactors [12,13]. The large scale implication of calcium looping cycle based on fluidized bed reactor has been proposed and economically assessed for pre-and post-combustion carbon capture [14]. It has been already used in power plants before as well [15,16].…”

Section: Carbon Capture and Storage Technologiesmentioning

confidence: 99%

“…The sintering effect is profound in fluidized bed reactors, where the attrition of the catalysts particles is intensified [14], whereas in plug-flow reactors sintering could be caused by unstable heating rates and prolonged calcination times [25]. The reduction in CO2 adsorptive capacity could be overcome by introducing to the structure of CaO some small cations, for example Al 3+ [27] or supporting CaO on -alumina [28].…”

Section: Carbon Capture and Storage Technologiesmentioning

confidence: 99%

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A radiofrequency heated reactor system for post-combustion carbon capture

Fernández

Sotenko

Derevschikov

et al. 2016

Chemical Engineering and Processing: Process Intensification

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Several problems with stabilization of electricity grid system are related to the time lag between the electricity supply and demand of the end users. Many power plants run for a limited period of time to compensate for increased electricity demand during peak hours. The amount of CO2 generated by these power installations can be substantially reduced via the development of new demand side management strategies utilizing CO2 absorption units with a short start-up time.The sorbent can be discharged using radiofrequency (RF) heating to fill the night-time valley in electricity demand helping in the stabilization of electricity grid. Herein a concept of RF heated fixed bed reactor has been demonstrated to remove CO2 from a flue gas using a CaCO3 sorbent. A very stable and reproducible operation has been observed over twenty absorptiondesorption cycles. The application of RF heating significantly reduced the transition time required for temperature excursions between the absorption and desorption cycles. The effect of flow reversal during desorption on desorption time has been investigated. The desorption time was reduced by 1.5 times in the revered flow mode and the total duration of a single absorption-desorption cycle was reduced by 20%. A reactor model describing the reduced desorption time has been developed. 2 Highlights• An RF reactor system has been demonstrated for post-combustion carbon capture.• The transition time between the absorption and desorption cycles was reduced by 2 times as compared to conventional heating• The reverse CO2 desorption flow mode reduced the desorption time by 1.5 times.• The energy efficiency of RF heated and conventionally heated bench reactors was compared

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Section: Carbon Capture and Storage Technologiesmentioning

confidence: 99%

Section: Carbon Capture and Storage Technologiesmentioning

confidence: 99%

A radiofrequency heated reactor system for post-combustion carbon capture

Fernández

Sotenko

Derevschikov

et al. 2016

Chemical Engineering and Processing: Process Intensification

View full text Add to dashboard Cite

show abstract

“…There are inherent thermodynamic advantages to this process, compared to other post-combustion CCS technologies, and a number of researchers have determined that this process imposes an efficiency penalty on a power station significantly lower than that imposed by either oxyfuel combustion or MEA scrubbing, at 6-8% points, as opposed to 10 -12 points for the latter technologies. (Romeo et al, 2010, Lin et al, 2011, Daval et al, 2011, Martinez et al, 2012 One issue which has received significant attention during previous research is that the ability of CaO produced from natural limestone reduces significantly (from ~ 0.7 mol CO2/mol CaO) when it is first used to capture CO2 to a significantly lower level (~0.1 mol CO2/mol CaO) after 30 cycles of calcination and carbonation (Fennell et al, 2007a, Blamey et al, 2010a) (hereafter, the number of moles of CO2 reacted per mole of CaO will be referred to as the carrying capacity of the limestone) .…”

Section: Introductionmentioning

confidence: 99%

Additive effects of steam addition and HBr doping for CaO-based sorbents for CO 2 capture

González

Blamey

Al-Jeboori

et al. 2016

Chemical Engineering and Processing: Process Intensification

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Calcium looping is a developing CO2 Capture and Storage technology that employs the reversible carbonation of CaO (potentially derived from natural limestone). The CO2 uptake potential of CaO particles reduces upon repeated reaction, largely through loss of reactive surface area and densification of particles. Doping of particles has previously been found to reduce the rate of decay of CO2 uptake, as has the introduction of steam into calcination and carbonation stages of the reaction. Here, the synergistic effects of steam and doping, using an HBr solution, of 5 natural limestones have been investigated. The enhancement to the CO2 uptake was found to be additive, with CO2 uptake after 13 cycles found to be up to 3 times higher for HBr-doped limestones subjected to cycles of carbonation and calcination in the presence of 10% steam, in comparison to natural limestone cycled in the absence of steam. A qualitative discussion of kinetic data is also presented.

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“…High-temperature post-combustion removal (HT-CCS) by carbonate looping has been identified by The European Technology Platform for Zero-Emission Power Generation (ZEP) as one of the most promising methods in the developing stage [2][3][4][5][6][7][8][9][10][11][12][13][14][15]. The concept relies on absorption of CO 2 by CaO with formation of CaCO 3 in the solid state.…”

Section: Introductionmentioning

confidence: 99%

“…The concept relies on absorption of CO 2 by CaO with formation of CaCO 3 in the solid state. CaCO 3 is subsequently stripped for CO 2 and CaO is regenerated by raising the temperature [4][5][6]. CaO is frequently chosen as the active substance in the solid-state carbonate looping system, but other alkali-earth metal oxides may be used similarly.…”

Section: Introductionmentioning

confidence: 99%

Carbon capture in molten salts

Olsen

Tomkute

2013

Energy Science & Engineering

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Capture and storage of fossil carbon emitted to the atmosphere from anthropogenic sources has been identified as a key technology for keeping humaninduced global warming below 2°C. Available technologies have not achieved widespread impact due to costs related to increased energy consumption and expensive, large process equipment. Here, we show how molten inorganic halide salt-based mixtures containing CaO may be utilized for selective capture and subsequent controlled release of carbon dioxide from diluted flue gases. Highly efficient absorption is demonstrated in a fluoride-based liquid, absorbing close to 100% of the CO 2 from a simulated flue gas with an absorbing column height of only 10 cm. Greater than 90% carbonation with >80% regeneration to CaO was recorded. Excellent cyclability has been achieved with a chloride-based liquid with 60% carbonation and 100% regeneration to CaO during four cycles. The high efficiencies may enable extraction of CO 2 from highly diluted gas mixtures.

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The calcium looping cycle for large-scale CO2 capture

Cited by 900 publications

References 134 publications

A radiofrequency heated reactor system for post-combustion carbon capture

A radiofrequency heated reactor system for post-combustion carbon capture

Additive effects of steam addition and HBr doping for CaO-based sorbents for CO 2 capture

Carbon capture in molten salts

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