Cyclic performance of CaCO3@mSiO2 for CO2 capture in a calcium looping cycle

Li, Chien Cheng; Wu, Ui Ting; Lin, Hong‐Ping

doi:10.1039/c4ta00516c

Cited by 46 publications

(25 citation statements)

References 33 publications

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“…In such a study, 12 g of limestone was diluted in water and then added to a gelatinous solution containing 0.72 g of type A gelatine and 45 g of water. Then the mixture was added to an acidified sodium silicate solution, stirred, thermally treated and activated by calcination at 600°C [106]. The resulting sorbent was then pelletised due to the initial unsuitability for use in FBs.…”

Section: Synthetic Sorbentsmentioning

confidence: 99%

Calcium looping sorbents for CO2 capture

2016

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Calcium looping (CaL) is a promising technology for the decarbonation of power generation and carbon-intensive (cement, lime and steel) industries. Although CaL has been extensively researched, some issues need to be addressed before the deployment of this technology at commercial scale. One of the important challenges for CaL is decay of sorbent reactivity during capture/regeneration cycles. Numerous techniques have been explored to enhance natural sorbent performance, to create new synthetic sorbents, and to reactivate and re-use deactivated material. This review provides a critical analysis of natural and synthetic sorbents developed for use in CaL. Special attention is given to the suitability of modified materials for utilisation in fluidised-bed systems. Namely, besides requirements for a practical adsorption capacity; a mechanically strong material, resistant to attrition, is required for the fluidised bed CaL operating conditions. However, the main advantage of CaL is that it employs a widely available and inexpensive sorbent. Hence, a compromise must be made between improving the sorbent performance and increasing its cost, which means a relatively practical, scalable, and inexpensive method to enhance sorbent performance, should be found. This is often neglected when developing new materials focusing only on very high adsorption capacity.

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Section: Synthetic Sorbentsmentioning

confidence: 99%

Calcium looping sorbents for CO2 capture

2016

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“…50,51 As an alternatively, nanostructured CaO can be inversely grafted onto refractory macro/mesoporous supports. [52][53][54] However, these procedures lack the ability to tailor the textural properties or requires a relatively large account of inert stabilizer. Recently, template-assisted synthesis has emerged as a method to design porous core-shell nanostructured CaO-based sorbents, composed of a refractory thin shell and active nanosized CaO-riched core.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of highly effective stabilized CaO sorbents via a sacrificial N-doped carbon nanosheet template

et al. 2019

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“…Natural sorbents (limestone and dolomite) are attractive due to their low cost, ready availability and, in the case of limestones, the potential suitability of the CaL purge material for the cement industry [12,13]. However, significant research efforts are being made to modify limestone sorbents or create new synthetic sorbents using techniques such as sol-gel combustion [14][15][16][17][18], organic acid modifications [19][20][21][22][23], co-precipitation [24,25] and granulation [26][27][28][29][30][31][32]. Such materials exhibited higher CO2 uptake, in general, when compared to natural lime-based sorbents.…”

Section: Introductionmentioning

confidence: 99%

Fragmentation of biomass-templated CaO-based pellets

Erans

Cerciello

Coppola

et al. 2017

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The use of biomass-templating materials with a cheap production method as an enhanced sorbent for CO2 uptake has been proposed recently. However, the attrition and fragmentation behaviour of this type of material, which is a vital parameter for calcium looping sorbents, has not yet been investigated in detail. In this work the attrition and fragmentation behaviour of biomass-templated sorbents is investigated. Three types of materials were prepared using a mechanical pelletiser: 1. lime and cement (LC); 2. lime and flour (LF); and 3. lime, cement and flour (LCF). These samples were heat treated in a pressurised heated strip reactor (PHSR) and in a bubbling fluidised bed (BFB) and changes in particle size distribution were measured to assess fragmentation. Results indicated that the addition of biomass enhances the propensity to undergo fragmentation. Upon heat treatment in the PHSR the particle size of LC was not modified significantly; on the contrary the mean particle diameter of LF decreased from 520 µm to 116 µm and that of LCF from 524 µm to 290 µm. Fragmentation tests in the BFB confirmed the trend: 67% of the particles of LF fragmented, against 53% of LCF and 18% of LC samples. The addition of biomass to the LC samples partially counteracts this performance degradation with respect to attrition. However, calcium aluminate pellets (LC) showed the lowest rate of fragmentation amongst all of the samples tested.

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Cyclic performance of CaCO₃@mSiO₂ for CO₂ capture in a calcium looping cycle

Abstract: A high-stability CaCO3@mesoporous silica sorbent in a calcium looping cycle was prepared by using a simple one-pot synthesis route.

Cited by 46 publications

References 33 publications

Calcium looping sorbents for CO2 capture

Calcium looping sorbents for CO2 capture

Synthesis of highly effective stabilized CaO sorbents via a sacrificial N-doped carbon nanosheet template

Fragmentation of biomass-templated CaO-based pellets

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