CaO-based CO2 sorbents: A review on screening, enhancement, cyclic stability, regeneration and kinetics modelling

Salaudeen, Shakirudeen A.; Acharya, Bishnu; Dutta, Animesh

doi:10.1016/j.jcou.2017.11.012

Cited by 190 publications

(120 citation statements)

References 192 publications

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“…The equations governing the kinetic and diffusion control regions are described by the following equations respectively [13,85]: The formation and growth of the CaCO 3 product layer is often considered to be the most important rate-limiting reaction step. The layer of CaCO 3 impedes the ability of CO 2 to further diffuse to the bulk and will also result in the plugging of the porous structure [80].…”

Section: Shrinking Core Modelmentioning

confidence: 99%

“…The shrinking core model (SCM) is derived from the homogeneous particle model [13] and was first introduced by Yagi and Kunii [81], with further zone-reaction models proposed by authors such as Ishida and Wen [82]. The SCM describes the particle as a non-porous sphere [83] and discriminates between product layer diffusion and reaction at the surface of the unreacted core as possible rate-determining steps [84].…”

Section: Shrinking Core Modelmentioning

confidence: 99%

“…The equations governing the kinetic and diffusion control regions are described by the following equations respectively [13,85]:…”

Section: Shrinking Core Modelmentioning

confidence: 99%

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Kinetics of Solid-Gas Reactions and Their Application to Carbonate Looping Systems

2019

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Reaction kinetics is an important field of study in chemical engineering to translate laboratory-scale studies to large-scale reactor conditions. The procedures used to determine kinetic parameters (activation energy, pre-exponential factor and the reaction model) include model-fitting, model-free and generalized methods, which have been extensively used in published literature to model solid-gas reactions. A comprehensive review of kinetic analysis methods will be presented using the example of carbonate looping, an important process applied to thermochemical energy storage and carbon capture technologies. The kinetic parameters obtained by different methods for both the calcination and carbonation reactions are compared. The experimental conditions, material properties and the kinetic method are found to strongly influence the kinetic parameters and recommendations are provided for the analysis of both reactions. Of the methods, isoconversional techniques are encouraged to arrive at non-mechanistic parameters for calcination, while for carbonation, material characterization is recommended before choosing a specific kinetic analysis method.

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Section: Shrinking Core Modelmentioning

confidence: 99%

Section: Shrinking Core Modelmentioning

confidence: 99%

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Kinetics of Solid-Gas Reactions and Their Application to Carbonate Looping Systems

2019

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“…Remarkably, the system uses widely available, non-toxic and cheap ($10/tonne (Hanak and Manovic, 2017a)) limestone as a raw material and allows a notable increase in the dispatchability of CSP plants because of the high energy density of the system (Pardo et al., 2014). A large number of lab-scale tests are being carried out to analyze the CaL process as a TCES system, mainly related to the reaction kinetics (Kyaw et al, 1996;Ortiz et al, 2018b;Salaudeen et al, 2018) multicyclic CaO conversion (Benitez-Guerrero et al, 2017aSarrión et al, 2018) and process integration (Alovisio et al, 2017;Chacartegui et al, 2016;Ortiz et al, 2019a).…”

Section: Current Status and Challenges On The Road To The Cal Processmentioning

confidence: 99%

Scaling-up the Calcium-Looping Process for CO<sub>2</sub> Capture and Energy Storage

Ortíz

Chacartegui

Pérez‐Maqueda

et al. 2021

KONA

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The Calcium-Looping (CaL) process has emerged in the last years as a promising technology to face two key challenges within the future energy scenario: energy storage in renewable energy-based plants and CO 2 capture from fossil fuel combustion. Based on the multicycle calcination-carbonation reaction of CaCO 3 for both thermochemical energy storage and post-combustion CO 2 capture applications, the operating conditions for each application may involve remarkably different characteristics regarding kinetics, heat transfer and material multicycle activity performance. The novelty and urgency of developing these applications demand an important effort to overcome serious issues, most of them related to gas-solids reactions and material handling. This work reviews the latest results from international research projects including a critical assessment of the technology needed to scale up the process. A set of equipment and methods already proved as well as those requiring further demonstration are discussed. An emphasis is put on critical equipment such as gas-solids reactors for both calcination and carbonation, power block integration, gas and solids conveying systems and auxiliary equipment for both energy storage and CO 2 capture CaL applications.

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“…Shakirudeen et al [4] studied the cyclic stability, regenerability and high-temperature adsorption of CO 2 of CaO based sorbents. They reported that CaO absorbs CO 2 up to 700 o C and then desorbs above that by calcination.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation of Co-Gasification of Coal and Biomass with CO2 Capture Using CaO Sorbent

Kumar¹,

Tjprc²

2018

IJMPERD

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Gasification is a promising eco-friendly technology to meet the current and future energy demands. One of the main issues of gasification is the presence of major greenhouse gas CO 2 in the product gas. The aim of this paper is to study the effect of parameters on sorbent-enabled gasification process to reduce CO 2 emissions. Experimental investigation of the effect of parameters Equivalence Ratio(ER), Steam to Fuel Ratio (SFR), a Sorbent-to-Fuel Ratio (SOFR) and a Coal-to-Biomass Ratio (CBR) on syngas composition in the co-gasification of coal and biomass is performed in a lab-scale biomass gasifier. Results indicated that the addition of sorbent during gasification decreases the CO 2 content and increases H 2 yield. An increase of 21.5% in H 2 and reduction of 24.3% in CO 2 emissionsis achieved at CBR of 0.25/0.75.

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CaO-based CO2 sorbents: A review on screening, enhancement, cyclic stability, regeneration and kinetics modelling

Cited by 190 publications

References 192 publications

Kinetics of Solid-Gas Reactions and Their Application to Carbonate Looping Systems

Kinetics of Solid-Gas Reactions and Their Application to Carbonate Looping Systems

Scaling-up the Calcium-Looping Process for CO<sub>2</sub> Capture and Energy Storage

Experimental Investigation of Co-Gasification of Coal and Biomass with CO2 Capture Using CaO Sorbent

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