Postcombustion CO2 capture with CaO. Status of the technology and next steps towards large scale demonstration

Sánchez-Biezma, A.; Ballesteros, J.C.; Dı́az, Luis F.; Zárraga, E. de; Álvarez, Francisco J.; Lopez, Jorge A. Pena; Arias, B.; Grasa, Gemma; Abanades, J.C.

doi:10.1016/j.egypro.2011.01.129

Cited by 77 publications

(39 citation statements)

References 14 publications

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“…La Pereda (Spain) which produces 1.7 MWth and is the largest CaL for CO 2 capture installed so far [8,9]. Other pilots that have achieved promising results are the 1 MWth pilot plant in Darmstadt (Germany) [10], the 0.3 MWth pilot in La Robla [11], the 0.2 MWth pilot at Stuttgart University (Germany) [12] and the 1.9 MWth pilot that is being constructed in Taiwan [13], apart from smaller projects that have also reported positive results [14][15][16].…”

Section: The Viability Of This Technology Has Been Demonstrated In Sementioning

confidence: 99%

Modelling of the kinetics of sulphation of CaO particles under CaL reactor conditions

Cordero

Alonso

2015

Fuel

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Furthermore it is demonstrated that the number of calcination carbonation cycles changes the sulphation patterns of the CaO from heterogeneous to homogeneous in all the limestones tested. For 50 carbonation calcination cycles and for particle sizes below 200 µm, the sulphation pattern is in all cases homogeneous. The sulphation rates were found to be first order with respect to SO 2 , and zero with respect to CO 2 . Steam was observed to have a positive effect only in the diffusion through the product layer controlled regime, as it leads to an improvement in the sulfation rates and effectiveness of the sorbent. Most of the experimental results of sulfation of highly cycled sorbents under all conditions can be fitted by means of the Random Pore Model (RPM) assuming that the kinetics and diffusion through the product layer of the CaSO 4 are the controlling regimes.

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Section: The Viability Of This Technology Has Been Demonstrated In Sementioning

confidence: 99%

Modelling of the kinetics of sulphation of CaO particles under CaL reactor conditions

Cordero

Alonso

2015

Fuel

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“…Among different solid sorbents, CaO is considered to be one of the most suitable catalyst for the process of CO2 absorption/desorption, because of its availability, low price, high durability and absorption capacity [18][19][20][21][22][23]. The reaction of CO2 with CaO is stoichiometric and exothermic with the maximum theoretical absorption capacity of 79 wt.% [24]:…”

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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“…As it has been demonstrated from the proved efficiency of large pilot-scale plants, with sustained CO 2 capture efficiencies over 90% [3], the CaL technology has a considerable potential for reducing postcombustion CO 2 emissions from industrial-scale power plants in the short-term. In practice, carbonation/calcination cycles are realized by means of two interconnected fluidized beds.…”

Section: Introductionmentioning

confidence: 99%

CO2 multicyclic capture of pretreated/doped CaO in the Ca-looping process. Theory and experiments

Valverde

Jiménez

Pérez‐Maqueda

2013

Phys. Chem. Chem. Phys.

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We study in this paper the conversion of CaO-based CO 2 sorbents when subjected to repeated carbonation/calcination cycles with a focus on thermally pretreated/doped sorbents. Analytical equations are derived to describe the evolution of conversion with the cycle number from a unifying model based on the balance between surface area loss due to sintering in the loopingcalcination stage and surface area regeneration as a consequence of solid-state diffusion during the looping-carbonation stage. Multicyclic CaO conversion is governed by the evolution of surface area loss/regeneration that strongly depends on the initial state of the pore skeleton. In the case of thermally pretreated sorbents, the initial pore skeleton is highly sintered and regeneration is relevant whereas, for nonpretreated sorbents, the initial pore skeleton is soft and regeneration is negligible. Experimental results are obtained for sorbents subjected to a preheating controlled rate thermal analysis (CRTA) program. By applying this preheating program in a CO 2 enriched atmosphere, CaO can be subjected to a rapid carbonation followed by a slow rate controlled decarbonation, which yields a highly sintered skeleton displaying a small conversion in the first cycle and self-reactivation in the next ones. Conversely, carbonation of the sorbent at a slow controlled rate enhances CO 2 solid-state diffusion, which gives rise, after a quick decarbonation, to a highly

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Postcombustion CO2 capture with CaO. Status of the technology and next steps towards large scale demonstration

Cited by 77 publications

References 14 publications

Modelling of the kinetics of sulphation of CaO particles under CaL reactor conditions

Modelling of the kinetics of sulphation of CaO particles under CaL reactor conditions

A radiofrequency heated reactor system for post-combustion carbon capture

CO2 multicyclic capture of pretreated/doped CaO in the Ca-looping process. Theory and experiments

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