CO2 capture and attrition performance of competitive eco-friendly calcium-based pellets in fluidized bed

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dc.contributor.authorSu, Chenglin
dc.contributor.authorDuan, Lunbo
dc.contributor.authorAnthony, Edward J.
dc.date.accessioned2018-11-19T14:18:59Z
dc.date.available2018-11-19T14:18:59Z
dc.date.issued2018-11-15
dc.description.abstractA 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 CO2 capture capacity and attrition properties. The results revealed that the cyclic CO2 capture capacity of pellets modified by pyrolyzed SBC and/or cement showed significantly better performance than limestone, which is consistent with the thermogravimetric analyzer (TGA) results. This is due to the improvement of pore structure and enhanced sintering resistance created by adding support materials to the sorbent. The elutriation rates of the composites prepared with pyrolyzed SBC and/or cement were consistently lower than for crushed limestone. Scanning electron microscopy (SEM) images indicated that the pellets possessed higher sphericity than limestone particles, thus reducing surface abrasion. Limestone exhibited a high attrition rate (diameter reduction rate) of 10.7 μm/cycle, which could be eliminated effectively by adding regenerated SBC and/or cement. ‘L‐5PC‐10CA’ (85% lime/5% pyrolyzed SBC/10% cement) exhibited an attrition rate of only 7.9 μm/cycle. Based on the analysis of breakage and probability density function (PDF) for particle size distribution, it appeared that pellets without cement experienced breakage (mostly chipping and disintegration) and surface abrasion, whereas ‘L‐10CA’ (90% lime/10% cement) and ‘L‐5PC‐10CA’ mainly suffered surface abrasion, combined with some chipping.en_UK
dc.identifier.citationSu C, Duan L, Anthony EJ. (2018) CO2 capture and attrition performance of competitive eco-friendly calcium-based pellets in fluidized bed. Greenhouse Gases: Science and Technology, Volume 8, Issue 6, December 2018, pp. 1124-1133en_UK
dc.identifier.issn2152-3878
dc.identifier.uri10.1002/ghg.1825
dc.identifier.urihttp://dspace.lib.cranfield.ac.uk/handle/1826/13655
dc.language.isoenen_UK
dc.publisherWileyen_UK
dc.rightsAttribution-NonCommercial 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by-nc/4.0/*
dc.subjectCO 2 captureen_UK
dc.subjectcalcium loopingen_UK
dc.subjectCaO‐based sorbenten_UK
dc.subjectspent bleaching clay regenerationen_UK
dc.subjectattritionen_UK
dc.titleCO2 capture and attrition performance of competitive eco-friendly calcium-based pellets in fluidized beden_UK
dc.typeArticleen_UK

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