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Screening of different manganese ores for chemical-looping combustion (CLC) and chemical-looping with oxygen uncoupling (CLOU)

Sebastian E. Sundqvist (Institutionen för kemi och kemiteknik, Oorganisk miljökemi) ; Mehdi Arjmand (Institutionen för kemi och kemiteknik, Oorganisk miljökemi) ; Tobias Mattisson (Institutionen för energi och miljö, Energiteknik) ; Magnus Rydén (Institutionen för energi och miljö, Energiteknik) ; Anders Lyngfelt (Institutionen för energi och miljö, Energiteknik)
International Journal of Greenhouse Gas Control (1750-5836). Vol. 43 (2015), p. 179-188.
[Artikel, refereegranskad vetenskaplig]

Oxygen carriers based on manganese oxides have recently shown great promise for use in chemical-looping combustion (CLC) and chemical-looping with oxygen uncoupling (CLOU). In this work, eleven different manganese ores have been investigated for application in CLC and CLOU. The reactivity towards methane and synthesis gas (50% CO in H-2) and the oxygen uncoupling behaviour at 900,950 and 1000 degrees C have been investigated. The mechanical stability and integrity of the ores were also evaluated in a jet-cup attrition rig. It was found that some of the ores could convert approximately 70-80% of the added methane to carbon dioxide, and most of them provided almost complete conversion of synthesis gas. In these experiments the bed mass was 15 g for experiments with methane and 2 g for experiments with syngas, corresponding to a specific solids inventory of 57 and 25 kg/MW, respectively. All of the oxygen carrier materials released small amounts of gas phase oxygen via CLOU, between 0.01 and 0.03 mass% of the oxygen carrier during the inert period. Some of the investigated ores also exhibited low rates of attrition. The combination of high reactivity with different fuel gases, relatively low attrition rates and low cost make some of these manganese ores highly interesting for a CLC process based on interconnected fluidized beds.

Nyckelord: Chemical looping combustion, CLOU, Manganese ore, Oxygen carriers, Methane, Synthesis gas

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Denna post skapades 2016-01-21. Senast ändrad 2016-04-28.
CPL Pubid: 231060


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Denna publikation är ett resultat av följande projekt:

Novel combustion principle with inherent capture of CO2 using combined manganese oxides that release oxygen (NOCO2) (EC/FP7/291235)