Overcoming the Problem of Loss-in-Capacity of Calcium Oxide in CO<sub>2</sub>Capture

Feng, Bo; Liu, Wenqiang; Li, Xiang; An, Hongyu

doi:10.1021/ef060258w

Cited by 112 publications

(77 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…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]. However, this strategy will lead to the increase in the catalysts costs.…”

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

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

show abstract

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

“…Previous studies (Li et al, 2005Feng et al, 2006), have reported promising materials, with a reasonably stable uptake of CO 2 ; they were obtained by mixing calcium oxide on the molecular level with an inert supporting material, with a high melting point, such as Al 2 O 3 , MgO, or TiO 2 . Our work concentrated on two ways of achieving truly mixed oxides, using CaO as the reactive phase.…”

Section: Preparation Of Sorbentsmentioning

confidence: 99%

Synthetic Ca‐based solid sorbents suitable for capturing CO₂ in a fluidized bed

et al. 2008

View full text Add to dashboard Cite

Coprecipitation and hydrolysis of CaO have been employed to produce Ca-based synthetic sorbents suitable for capturing CO 2 in a fluidized bed. Their composition, CO 2 uptake, volume in small pores (2-200 nm) and resistance to attrition were measured and compared to those of limestone and dolomite. Sorbents produced by hydrolysis showed the highest uptake and resistance to attrition. After 20 cycles of carbonation and calcination, two sorbents exceeded the uptake of both limestone and dolomite, when subjected to the same regimes of reaction. A sorbent's uptake of CO 2 was shown to be determined by the volume in pores narrower than ∼200 nm.On a eu recoursà la co-précicipation età l'hydrolyse de CaO pour produire des sorbants convenantà la capture de CO2 dans un lit fluidisé. Leur composition, le retrait de CO 2 , le volume dans les petits pores (2-200 nm) et la résistanceà l'attrition ontété mesurés et comparésà ceux du calcaire et de la dolomite. Les sorbants produits par hydrolyse montre l'absorption et la résistanceà l'attrition les plusélevées. Après 20 cycles de carbonisation et calcination, deux sorbants dépassent la capacité de retrait du calcaire et de la dolomite, lorsqu'on applique les mêmes régimes de réaction. On montre que le retrait de CO 2 par un sorbant est déterminé par le volume des pores plusétroit que 200 nm.

show abstract

“…[12] The loss in capacity is due in part from an intractable build up of oxide crystallites which effectively decreases the reactive surface area for CO 2 . [15] Solid amine-sorbents work in much the same way as aqueous amine systems, but with much lower water and hence potentially lower energy requirements. A number of aminemodified materials have been examined for reversible CO 2 adsorption/desorption behavior, however, the bulk of them suffer from low CO 2 capacities, instability during cycling, high temperature requirements, and are prohibitively expensive for more general use.…”

Section: Solid Sorbentsmentioning

confidence: 99%

Thermokinetic/mass-transfer analysis of carbon capture for reuse/sequestration.

Stechel¹,

Brady²,

Staiger³

et al. 2010

View full text Add to dashboard Cite

Effective capture of atmospheric carbon is a key bottleneck preventing non bio-based, carbon-neutral production of synthetic liquid hydrocarbon fuels using CO 2 as the carbon feedstock. Here we outline the boundary conditions of atmospheric carbon capture for recycle to liquid hydrocarbon fuels production and re-use options and we also identify the technical advances that must be made for such a process to become technically and commercially viable at scale. While conversion of atmospheric CO 2 into a pure feedstock for hydrocarbon fuels synthesis is presently feasible at the bench-scale -albeit at high cost energetically and economically-the methods and materials needed to concentrate large amounts of CO 2 at low cost and high efficiency remain technically immature. Industrial-scale capture must entail: (1) Processing of large volumes of air through an effective CO 2 capture media and (2) Efficient separation of CO 2 from the processed air flow into a pure stream of CO 2 . 4 ACKNOWLEDGMENTS

show abstract

Overcoming the Problem of Loss-in-Capacity of Calcium Oxide in CO₂Capture

Cited by 112 publications

References 15 publications

A radiofrequency heated reactor system for post-combustion carbon capture

A radiofrequency heated reactor system for post-combustion carbon capture

Synthetic Ca‐based solid sorbents suitable for capturing CO₂ in a fluidized bed

Thermokinetic/mass-transfer analysis of carbon capture for reuse/sequestration.

Contact Info

Product

Resources

About

Overcoming the Problem of Loss-in-Capacity of Calcium Oxide in CO2Capture

Cited by 112 publications

References 15 publications

A radiofrequency heated reactor system for post-combustion carbon capture

A radiofrequency heated reactor system for post-combustion carbon capture

Synthetic Ca‐based solid sorbents suitable for capturing CO2 in a fluidized bed

Thermokinetic/mass-transfer analysis of carbon capture for reuse/sequestration.

Contact Info

Product

Resources

About

Overcoming the Problem of Loss-in-Capacity of Calcium Oxide in CO₂Capture

Synthetic Ca‐based solid sorbents suitable for capturing CO₂ in a fluidized bed