From waste to high value utilization of spent bleaching clay in synthesizing high-performance calcium-based sorbent for CO 2 capture

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dc.contributor.authorSu, Chenglin
dc.contributor.authorDuan, Lunbo
dc.contributor.authorDonat, Felix
dc.contributor.authorAnthony, Edward J.
dc.date.accessioned2017-11-09T15:42:14Z
dc.date.available2017-11-09T15:42:14Z
dc.date.issued2017-11-03
dc.description.abstractA novel calcium looping (CaL) process integrated with a spent bleaching clay (SBC) treatment is proposed whereby fuels and/or heat from regeneration of SBC provide extra energy for the calcination process, in addition, the regenerated SBC can be used to synthesize enhanced CaO-based sorbents. Different kinds of composite samples were prepared with the regenerated SBC and/or aluminate cement at various doping ratios via a pelletization process. All pellets were subjected to thermogravimetic analyzer tests employing severe reaction conditions to determine the optimal doping ratios and regeneration method for the SBC based sorbents. These results demonstrate that pellets containing combustible components showed higher CO2 uptakes, due to the improved pore structure, which was verified by N2 adsorption measurements. The as-prepared sorbent “L-10PC” (90 wt.% CaO/10 wt.% pyrolytic SBC) achieved a final CO2 uptake of 0.164 g(CO2) g(calcined sorbent)−1 after 20 cycles, which was 67.3% higher than that of natural limestone particle. A new larnite (Ca2SiO4) phase was detected by X-ray diffraction analysis, however the weak diffraction peak associated with it indicated a low content of larnite in the pellets, which produced a smaller effect on performance compared to cement. A synergistic effect was achieved for a sample designated as “L-5PC-10CA” (85 wt.% CaO/5 wt.% pyrolytic SBC /10 wt.% cement), which resulted in the highest final uptake of 0.208 g(CO2) g(calcined sorbent)−1 after 20 cycles. Considering the simplicity of pyrolysis regeneration process and the excellent capture capability of pellets doped by pyrolytic SBC, the proposed system integrating CaL with SBC pyrolysis treatment appears to offer particular promise for further development.en_UK
dc.identifier.citationChenglin Su, Lunbo Duan, Felix Donat, Edward John Anthony, From waste to high value utilization of spent bleaching clay in synthesizing high-performance calcium-based sorbent for CO2 capture, Applied Energy, Volume 210, 15 January 2018, Pages 117-126en_UK
dc.identifier.cris18820078
dc.identifier.issn0306-2619
dc.identifier.urihttps://doi.org/10.1016/j.apenergy.2017.10.104
dc.identifier.urihttp://dspace.lib.cranfield.ac.uk/handle/1826/12709
dc.language.isoenen_UK
dc.publisherElsevieren_UK
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 International
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subjectCO2captureen_UK
dc.subjectCalcium loopingen_UK
dc.subjectCaO-based sorbenten_UK
dc.subjectSpent bleaching clay regenerationen_UK
dc.subjectPelletizationen_UK
dc.titleFrom waste to high value utilization of spent bleaching clay in synthesizing high-performance calcium-based sorbent for CO 2 captureen_UK
dc.typeArticleen_UK

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