Economical assessment of competitive enhanced limestones for CO2 capture cycles in power plants

Romeo, Luis M.; Lara, Yolanda; Lisbona, Pilar; Martínez, Ana

doi:10.1016/j.fuproc.2009.03.014

Cited by 84 publications

(73 citation statements)

References 39 publications

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“…Moreover, the harmful effect of recarbonation becomes more apparent for the milled sample of CaO conversion comparable to the observed in our study by using milled limestone, the 294 reduction of CO 2 avoided could be estimated between 1.5 and 3 e/tonne depending on the 295 CaO/CO 2 molar ratio [12]. Even though in our study limestone crystallinity has been mod-296 ified by applying diverse pretreatments it may be argued that the degree of crystallinity of 297 the limestone to be used in the practical process should be an important parameter to be 298 considered when assessing the scaled-up process efficiency.…”

supporting

confidence: 83%

“…A major advantage for the industrial competitiveness of the CaL technology is the low 48 cost, wide availability and synergy with the cement industry of natural limestone [12][13][14]. 49 However, limestone derived CaO suffers a progressive loss of reactivity when subjected to 50 multiple carbonation/calcination cycles, which is a further critical aspect of the CaL technol-51 ogy.…”

mentioning

confidence: 99%

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Relevant Influence of Limestone Crystallinity on CO₂ Capture in The Ca-Looping Technology at Realistic Calcination Conditions

Valverde

Jiménez²,

Pérez‐Maqueda³

2014

Environ. Sci. Technol.

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8We analyze the role of limestone crystallinity on its CO 2 capture performance when subjected 9 to carbonation/calcination cycles at conditions mimicking the Ca-looping (CaL) technology 10 for post-combustion CO 2 capture. The behavior of raw and pretreated limestones (milled and 11 thermally annealed) is investigated by means of thermogravimetric analysis (TGA) tests under 12 realistic sorbent regeneration conditions, which necessarily involve high CO 2 partial pressure in 13 the calciner and quick heating rates. The pretreatments applied lead to contrasting effects on 14 the solid crystal structure and, therefore, on its resistance to solid-state diffusion. Our results 15show that decarbonation at high CO 2 partial pressure is notably promoted by decreasing

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confidence: 83%

mentioning

confidence: 99%

Relevant Influence of Limestone Crystallinity on CO₂ Capture in The Ca-Looping Technology at Realistic Calcination Conditions

Valverde

Jiménez²,

Pérez‐Maqueda³

2014

Environ. Sci. Technol.

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“…Using a framework set out by Romeo et al (2009) and cycling in the presence of steam in a small fluidised-bed reactor, the long-term carrying capacity of natural limestone can be increased further, in some cases by more than a factor of 3. We believe that the fluidised bed system utilised, though allowing for the collection of sufficient spent sorbent in order to conduct investigations of the pore size distribution, enhances the effects of solid state diffusion in the system.…”

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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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“…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]. Another example is the combination of the carbonate looping process with the production of cement, where the raw cement meal (70 % w/w limestone, the rest are oxides of Fe, Al, Si) can be used to capture effluent CO2 and further as the feed for clinker production [17].…”

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

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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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Economical assessment of competitive enhanced limestones for CO2 capture cycles in power plants

Cited by 84 publications

References 39 publications

Relevant Influence of Limestone Crystallinity on CO₂ Capture in The Ca-Looping Technology at Realistic Calcination Conditions

Relevant Influence of Limestone Crystallinity on CO₂ Capture in The Ca-Looping Technology at Realistic Calcination Conditions

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

A radiofrequency heated reactor system for post-combustion carbon capture

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Economical assessment of competitive enhanced limestones for CO2 capture cycles in power plants

Cited by 84 publications

References 39 publications

Relevant Influence of Limestone Crystallinity on CO2 Capture in The Ca-Looping Technology at Realistic Calcination Conditions

Relevant Influence of Limestone Crystallinity on CO2 Capture in The Ca-Looping Technology at Realistic Calcination Conditions

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

A radiofrequency heated reactor system for post-combustion carbon capture

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Product

Resources

About

Relevant Influence of Limestone Crystallinity on CO₂ Capture in The Ca-Looping Technology at Realistic Calcination Conditions

Relevant Influence of Limestone Crystallinity on CO₂ Capture in The Ca-Looping Technology at Realistic Calcination Conditions