A solid sorbent-based multi-stage fluidized bed process with inter-stage heat integration as an energy efficient carbon capture process

Kim, Ki Woong; Kim, Daewook; Park, Yong‐Ki; Lee, Kwang Soon

doi:10.1016/j.ijggc.2014.03.012

Cited by 40 publications

(22 citation statements)

References 40 publications

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“…Once needed, the reactants are circulated into a carbonator reactor, where the energy stored in chemical form is released through the reverse reaction (carbonation). Efficient gas-solid contact and heat/mass transfer in the calciner and carbonator reactors could be ensured by the use of circulating fluidized-beds (CFB), which are operated under the fast fluidization regime with gas velocities of the order of 5-10 m/s [26,27]. An advantage of this technology ahead of its incorporation into the market is the proven efficiency and durability of such type of fluidized bed reactors.…”

Section: Introductionmentioning

confidence: 99%

Thermochemical energy storage of concentrated solar power by integration of the calcium looping process and a CO2 power cycle

et al. 2016

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Energy storage is the main challenge for a deep penetration of renewable energies into the grid to overcome their intrinsic variability. Thus, the commercial expansion of renewable energy, particularly wind and solar, at large scale depends crucially on the development of cheap, efficient and non-toxic energy storage systems enabling to supply more flexibility to the grid. The Ca-Looping (CaL) process, based upon the reversible carbonation/calcination of CaO, is one of the most promising technologies for thermochemical energy storage (TCES), which offers a high potential for the long-term storage of energy with relatively small storage volume. This manuscript explores the use of the CaL process to store Concentrated Solar Power (CSP). A CSP-CaL integration scheme is proposed mainly characterized by the use of a CO 2 closed loop for the CaL cycle and power production, which provides heat decoupled from the solar source and temperatures well above the ~550ºC limit that poses the use of molten salts currently used to store energy as sensible heat. The proposed CSP-CaL integration leads to high values of plant global efficiency (of around 45-46%) with a storage capacity that allows for long time gaps between load and discharge. Moreover, the use of environmentally benign, abundantly available and cheap raw materials such as natural limestone would mark a milestone on the road towards the industrial competitiveness of CSP.

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Section: Introductionmentioning

confidence: 99%

Thermochemical energy storage of concentrated solar power by integration of the calcium looping process and a CO2 power cycle

et al. 2016

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“…Efficient gas-solid contact and heat/mass transfer would be ensured by the use of circulating fluidizedbed reactors (CBF). CFBs are typically operated at atmospheric pressure under the fast fluidization regime, with gas velocities of the order of 5-10 m/s [9,10]. The partially carbonated particles are driven into a second fluidized bed reactor (calciner), where CaO is regenerated by calcination under high temperatures and necessarily high CO 2 concentration [11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

A new model of the carbonator reactor in the calcium looping technology for post-combustion CO2 capture

Ortíz

Chacartegui

Becerra

et al. 2015

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“…A flow-sheet simulation result of this process for a 500MWe pulverized coal-fired power plant was published [18]. The result promised that this process will be a significant progress toward the solution for global warming problem through CCS.…”

Section: Resultsmentioning

confidence: 99%

Energy recoverable multi-stage dry sorbent CO2 capture process

et al. 2014

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To reduce the energy required for CO 2 desorption, an energy exchangeable three-stage dry sorbent CO 2 capture process was designed and in the step of efficiency evaluation. The process is composed of three stages working at different sorptiondesorption temperatures to utilize the heat released at higher temperature absorption cycles for the regeneration of sorbent working at lower temperature cycles; low-, medium-and high-temperature stages. For this process three kinds of sorbents having different sorption-desorption temperatures were developed; amines supported on silica (low temperature), alkali-promoted MgO (medium temperature) and Li 4 SiO 4 (high temperature). Based on the kinetic properties of these three types of sorbents, several process models were simulated and it was found that dilute-dilute sorption-desorption process is the most efficient. According to the simulation, the thermal energy demand for the three-stage CO 2 capture process was 1.68 GJ/ton-CO 2 , which means about 60% of the thermal energy required for a single-stage dry sorbent process can be saved. To evaluate this concept, real facility which can treat 60 Nm 3 /hr exhaust gas was constructed and in the step of operation.

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A solid sorbent-based multi-stage fluidized bed process with inter-stage heat integration as an energy efficient carbon capture process

Cited by 40 publications

References 40 publications

Thermochemical energy storage of concentrated solar power by integration of the calcium looping process and a CO2 power cycle

Thermochemical energy storage of concentrated solar power by integration of the calcium looping process and a CO2 power cycle

A new model of the carbonator reactor in the calcium looping technology for post-combustion CO2 capture

Energy recoverable multi-stage dry sorbent CO2 capture process

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