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

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dc.contributor.authorWang, Ke
dc.contributor.authorClough, Peter T.
dc.contributor.authorZhao, Pengfei
dc.contributor.authorAnthony, Edward J.
dc.date.accessioned2019-03-28T10:04:29Z
dc.date.available2019-03-28T10:04:29Z
dc.date.issued2019-03-18
dc.description.abstractCalcium looping, a promising high-temperature CO2 capture technique, offers a midterm economic solution to mitigate anthropogenic CO2 emissions. The main challenge for calcium looping is the synthesis of highly efficient CaO-based sorbents that can be used over many reaction cycles. Here, a sacrificial N-doped carbon nanosheet template was developed which produces MgO-stabilized, CaO sorbents with fast adsorption rates, high capacities and remarkable long term performance over many cycles. The characterization results show that such a template was formed through in situ pyrolysis of an organic acid and nitrates in a simple heating process under nitrogen. The presence of a carbonaceous template prevented crystallite growth, featured highly macroporous nanosheet (~60 nm thick) morphologies, ensured homogeneously mixing of Ca and Mg, which is essential to attain minimal diffusion limitations, mitigated sintering, and produced structural stabilization. Thus, 10 mol% MgO acting as an inert stabilizer was sufficient to achieve a CO2 uptake of 0.65 g/g (corresponding to a capacity retention of 89.9%) after 10 cycles in realistic conditions, as confirmed by TGA analyses. This N-doped carbon template can be applied generally to form a wide range of porous and nanostructured stabilized-CaO sorbents with stable CO2 uptakes.en_UK
dc.identifier.citationWang K, Clough PT, Zhao P, Anthony, EJ. (2018) Synthesis of highly effective stabilized-CaO sorbents via a sacrificial N-doped carbon nanosheet template. Journal of Materials Chemistry A, Volume 7, Issue 15, April 2019, pp. 9173-9182en_UK
dc.identifier.cris23248992
dc.identifier.issn2050-7488
dc.identifier.urihttps://doi.org/10.1039/C9TA01237K
dc.identifier.urihttp://dspace.lib.cranfield.ac.uk/handle/1826/14014
dc.language.isoenen_UK
dc.publisherRoyal society of Chemistryen_UK
dc.rightsAttribution-NonCommercial 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by-nc/4.0/*
dc.subjectCO2 captureen_UK
dc.subjectN-doped carbonen_UK
dc.subjectSacrificial templateen_UK
dc.titleSynthesis of highly effective stabilized-CaO sorbents via a sacrificial N-doped carbon nanosheet templateen_UK
dc.typeArticleen_UK

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