Evolution of sorptive and textural properties of CaO-based sorbents during repetitive sorption/regeneration cycles

Bazaikin, Y.; Malkovich, Evgeny; Derevschikov, Vladimir S.; Лысиков, А. И.; Okunev, A. G.

doi:10.1016/j.ces.2016.06.064

Cited by 15 publications

(5 citation statements)

References 35 publications

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“…Longer reaction time and higher temperature result in more severe sintering of CaO in the calcination stage, which is not beneficial for the carbonation of CaO [50]. Thus, a shorter time and lower temperature lead to a higher carbonation of CaO due to the slight sintering [51,52]. In addition, the solar calciner at low temperature needs fewer solar reflectors, so the cost is also reduced [53,54].…”

Section: Cao/caco 3 Tchsmentioning

confidence: 99%

Development of Thermochemical Heat Storage Based on CaO/CaCO3 Cycles: A Review

Yang

Yan

et al. 2021

Energies

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Due to the inconsistency and intermittence of solar energy, concentrated solar power (CSP) cannot stably transmit energy to the grid. Heat storage can maximize the availability of CSP plants. Especially, thermochemical heat storage (TCHS) based on CaO/CaCO3 cycles has broad application prospects due to many advantages, such as high heat storage density, high exothermic temperature, low energy loss, low material price, and good coupling with CSP plants. This paper provided a comprehensive outlook on the integrated system of CaO/CaCO3 heat storage, advanced reactor design, heat storage conditions, as well as the performance of CaO-based materials. The challenges and opportunities faced by current research were discussed, and suggestions for future research and development directions of CaO/CaCO3 heat storage were briefly put forward.

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Section: Cao/caco 3 Tchsmentioning

confidence: 99%

Development of Thermochemical Heat Storage Based on CaO/CaCO3 Cycles: A Review

Yang

Yan

et al. 2021

Energies

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“…The increased efficiency of recarbonization can be obtained by adding a small amount of water vapor (Grasa et al, 2014). Additionally, a model of the evolution of CaO-based sorbent properties in carbonation/recarbonization/calcination cycles was proposed (Bazaikin et al, 2016). The developed model predicting the changing of sorbent specific surface area and pore size was based on sintering physics, CO 2 capture kinetics, and CaO morphology.…”

Section: Regeneration Of Spent Cao-based Sorbentsmentioning

confidence: 99%

Chemical and Process Engineering

Konopacka-Łyskawa,

Czaplicka,

Szefer

2021

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The use of CaO-based adsorbents has a high potential to capture CO 2 from various systems due to its high reactivity with CO 2 , high capacity, and low cost of naturally derived CaO. The application of CaO-based sorbents to remove carbon dioxide is based on a reversible reaction between CaO and CO 2 . However, multiple carbonation/calcination cycles lead to a rapid reduction in the sorption capacity of natural CaO, and therefore efforts are made to reduce this disadvantage by doping, regenerating, or producing synthetic CaO with stable sorption properties. In this review, the synthesis methods used to obtain CaO-based sorbents were collected, and the latest research on improving their sorption properties was presented. The most commonly used models to describe the CO 2 sorption kinetics on CaO-based sorbents were also introduced. The methods of sorbent regeneration and their effectiveness were summarized. In the last part of this review, the current state of advancement of work on the larger scale, possible problems, and opportunities during scale-up of the calcium looping process were presented. Concluding (i) the presented methods of adsorbent synthesis allow for the production of doped CaO adsorbents on a laboratory scale, characterized by high CO 2 capture efficiency and good cyclic stability, (ii) the most commonly used in practice models describing CO 2 chemisorption are empirical models and the shrinking core model, (iii) the use of sorbent regeneration allows for a significant improvement in sorption capacity, (iv) the scale-up of both the production of new CaO adsorbents and the CO 2 capture technology with their use requires further development.

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“…Improving the cyclic stability of CaO-based adsorbents is a research hotspot in this field. Many researches focused on optimizing the pore structure [5][6][7][8], doping additives [9][10][11] and improving the skeleton stability of CaO-based adsorbents to reduce sintering [12]. Manovic et al [11]; [13,14] found that limestone exhibited an abnormal 'self-reactivation phenomenon' after thermal pretreatment at 900-1200 ℃ for 6-48h, in which the sorption capacity of the adsorbent rose with the increasing of initial cycle number (Figure 1).…”

Section: Mini Reviewmentioning

confidence: 99%

The Mechanism of Self-Reactivation of Cao-Based CO2 Adsorbents

Wu¹

2019

RDMS

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The self-reactivation phenomenon of CaO-based CO2 adsorbents produced by high-temperature thermal pretreatment improves the durability of adsorbents in calcium looping process. The selfreactivation mechanisms of limestone and Nano-CaO-based adsorbents were explained as the conversion of hard skeleton to soft skeleton and the formation of cracks between Nano-grains respectively. The summarization of the recent researches about the triggering conditions is to provide reference for grasping and utilizing the self-reactivation of adsorbents.

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Evolution of sorptive and textural properties of CaO-based sorbents during repetitive sorption/regeneration cycles

Cited by 15 publications

References 35 publications

Development of Thermochemical Heat Storage Based on CaO/CaCO3 Cycles: A Review

Development of Thermochemical Heat Storage Based on CaO/CaCO3 Cycles: A Review

Chemical and Process Engineering

The Mechanism of Self-Reactivation of Cao-Based CO2 Adsorbents

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