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Chemical - Looping with oxygen uncoupling using Mn/Mg-based oxygen carriers - Oxygen release and reactivity with methane

Alexander Shulman (Institutionen för kemi- och bioteknik, Oorganisk miljökemi) ; Erik Cleverstam (Institutionen för kemi- och bioteknik, Oorganisk miljökemi) ; Tobias Mattisson (Institutionen för energi och miljö, Energiteknik) ; Anders Lyngfelt (Institutionen för energi och miljö, Energiteknik)
Fuel (0016-2361). Vol. 90 (2011), 3, p. 941-950.
[Artikel, refereegranskad vetenskaplig]

Chemical-looping combustion with oxygen uncoupling (CLOU) is a method for combustion of solid and gaseous fossil fuels, which enables easy separation of carbon dioxide from the gaseous product mixture. In contrast to the related chemical-looping combustion (CLC) technology where gaseous or gasified fuels react directly with oxygen carriers, CLOU processes require oxygen carrier materials to be able to release oxygen in the fuel reactor and to regenerate by re-oxidation in oxygen-rich atmosphere in the air reactor at elevated temperature. Oxygen uncoupling properties and reactivities for methane combustion of 12 oxygen carrier particles, produced from mixtures of manganese and magnesium oxides with optional addition of titanium dioxide or calcium hydroxide, are investigated in a quartz batch reactor at 810 degrees C, 850 degrees C, 900 degrees C and 950 degrees C. All investigated oxygen carriers have oxygen release characteristics. The addition of calcium hydroxide facilitates oxygen release and combustion of methane, whereas addition of titanium dioxide does not have a pronounced effect on either oxygen uncoupling or reactivity of the oxygen carrier. In general, particles with greater extent of oxygen release have superior methane combustion properties. (C) 2010 Elsevier Ltd. All rights reserved.

Nyckelord: Chemical-looping with oxygen uncoupling, CO2 capture, Manganese oxide, Methane, Oxygen carriers, exergy analysis, reactor system, natural-gas, solid fuels, combustion, particles, operation



Denna post skapades 2011-03-24. Senast ändrad 2016-12-05.
CPL Pubid: 138300

 

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Institutioner (Chalmers)

Institutionen för kemi- och bioteknik, Oorganisk miljökemi (2005-2014)
Institutionen för energi och miljö, Energiteknik (2005-2017)

Ämnesområden

Kemiteknik

Chalmers infrastruktur