Copper-based oxygen carriers supported with alumina/lime for the chemical looping conversion of gaseous fuels

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dc.contributor.authorHaider, Syed K.
dc.contributor.authorErans Moreno, Maria
dc.contributor.authorDonat, Felix
dc.contributor.authorDuan, Lunbo
dc.contributor.authorScott, Stuart A.
dc.contributor.authorManovic, Vasilije
dc.contributor.authorAnthony, Edward J.
dc.date.accessioned2017-08-02T13:30:46Z
dc.date.available2017-08-02T13:30:46Z
dc.date.issued2017-07-29
dc.description.abstractCopper (II) oxide in varying ratios was combined with either an alumina-based cement (Al300), or CaO derived from limestone as support material in a mechanical pelletiser. This production method was used to investigate its influence on possible mechanical and chemical improvements for oxygen carriers in chemical looping processes. These materials were tested in a lab-scale fluidised bed with CO or CH4 as a reducing gas at 950 °C. As expected, the oxygen carriers containing a greater ratio of support material exhibited an enhanced crushing strength. Oxygen carriers comprised of a 1:3 ratio of support material to active CuO exhibited increased crushing strength by a minimum of 280% compared to pure CuO pellets. All oxygen carriers exhibited a high CO conversion yield and were fully reducible from CuO to Cu. For the initial redox cycle, Al300-supported oxygen carriers showed the highest fuel and oxygen carrier conversion. The general trend observed was a decline in conversion with an increasing number of redox cycles. In the case of CaO-supported oxygen carriers, all but one of the oxygen carriers suffered agglomeration. The agglomeration was more severe in carriers with higher ratios of CuO. Oxygen carrier Cu25Al75 (75% wt. aluminate cement and 25% wt. CuO), which did not suffer from agglomeration, showed the highest attrition with a loss of approximately 8% of its initial mass over 25 redox cycles. The reducibility of the oxygen carriers was limited with CH4 in comparison to CO. CH4 conversion yielded 15-25% and 50% for Cu25Ca75 (25% wt. CuO and 75% wt. CaO) and Cu25Al75, respectively. Cu25Ca75 demonstrated improved conversion, whereas Cu25Al75 exhibited a trending decrease in conversion with increasing redox cycles.en_UK
dc.identifier.citationSyed K Haider, María Erans, Felix Donat, Lunbo Duan, Stuart A Scott, Vasilije Manovic, Edward J Anthony, Copper-based oxygen carriers supported with alumina/lime for the chemical looping conversion of gaseous fuels, Journal of Energy Chemistry, Volume 26, Issue 5, 2017, Pages 891-901en_UK
dc.identifier.issn2095-4956
dc.identifier.urihttp://dx.doi.org/10.1016/j.jechem.2017.07.014
dc.identifier.urihttp://dspace.lib.cranfield.ac.uk/handle/1826/12264
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.subjectChemical-looping
dc.subjectOxygen carrier
dc.subjectCopper
dc.subjectCarbon capture
dc.titleCopper-based oxygen carriers supported with alumina/lime for the chemical looping conversion of gaseous fuelsen_UK
dc.typeArticleen_UK

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