2018
DOI: 10.1002/ghg.1825
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CO2 capture and attrition performance of competitive eco‐friendly calcium‐based pellets in fluidized bed

Abstract: A system incorporating spent bleaching clay (SBC) into the calcium looping (CaL) process has been proposed. In this paper, prepared sorbents doped with regenerated SBC and cement were tested in a bubbling fluidized bed (BFB) to examine in detail their cyclic CO 2 capture capacity and attrition properties. The results revealed that the cyclic CO 2 capture capacity of pellets modified by pyrolyzed SBC and/or cement showed significantly better performance than limestone, which is consistent with the thermogravime… Show more

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Cited by 8 publications
(4 citation statements)
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“…(b) and (c), a shift to the highest binding energy of Ca 2p and O 1s in C‐Mn‐CaO was found, which was not observed in the original CaO. It means that it was easier for the Ca atom and O atom in C‐Mn‐CaO to give electrons to CO 2 than the original CaO, which assisted the fast formation of CO 3 . The doping of Mn in CaO was beneficial to the electron transport from CaO to CO 2 , which accelerated the carbonation rates of CaO.…”
Section: Resultsmentioning
confidence: 93%
See 1 more Smart Citation
“…(b) and (c), a shift to the highest binding energy of Ca 2p and O 1s in C‐Mn‐CaO was found, which was not observed in the original CaO. It means that it was easier for the Ca atom and O atom in C‐Mn‐CaO to give electrons to CO 2 than the original CaO, which assisted the fast formation of CO 3 . The doping of Mn in CaO was beneficial to the electron transport from CaO to CO 2 , which accelerated the carbonation rates of CaO.…”
Section: Resultsmentioning
confidence: 93%
“…Natural calcium‐based sorbents like limestone, dolomite, and some calcium‐based industrial wastes like carbide slag, are used to capture CO 2 during the calcium looping process. However, the decay in the CO 2 capture capacities of calcium‐based sorbents with the number of carbonation / calcination cycles, resulting from sintering, is the major problem that limits CO 2 capture efficiency and the large‐scale industrial application of calcium looping . Attempts have been made to improve the CO 2 capture capacities and the sintering resistance of calcium‐based sorbents during multiple cycles.…”
Section: Introductionmentioning
confidence: 99%
“…Calcium aluminate cement is a widely used inexpensive support for naturally occurring CaO-based sorbents, which is able to simultaneously enhance the sintering resistance, attrition resistance, and mechanical strength. ,, Manovic et al used a wet mixing method to synthesize calcium-aluminate-cement-stabilized limestone and then assessed its cyclic performance in TGA . The results showed that the calcium-aluminate-cement-stabilized limestone possessed good cyclic stability, demonstrating a CaO conversion of 28% even after 1000 cycles.…”
Section: Improvements Of Naturally Occurring Cao-based Sorbentsmentioning
confidence: 99%
“…The sorbent CO 2 uptake rate and capacity decay over iterated looping due to sintering and/or possible reaction of the sorbent with acidic gases, like SO 2 (Coppola et al, 2019a). Moreover, sorbent attrition and fragmentation affect the particle size distribution (and residence time distribution) contributing to calcium losses as elutriable fines (Su et al, 2018;Coppola et al, 2019b). The management of the CaL cycle thus requires a continuous make-up of a fresh limestone stream, so to take into account and compensate deactivation and elutriation phenomena.…”
Section: Solar-driven Looping Cyclesmentioning
confidence: 99%