CO2 capture from direct combustion of solid fuels with Chemical-Looping Combustion

TL;DRAbstract

Chemical-looping combustion (CLC) is a combustion technology where an oxygen carrier is used to transfer oxygen from the combustion air to the fuel, thus avoiding direct contact between air and fuel. Thus, the CO2 is inherently separated from the flue gases with a considerable lower energy penalty and cost compared to other techniques for CO2 separation. The oxygen carrier is circulated between two reactors, a fuel and an air reactor, where the flue gas from the air reactor contains only N2 and some unreacted O2 and the flue gas from the fuel reactor contains only CO2 and H2O. The water can easily be condensed and the remaining CO2 can be transported for underground storage. Most of the prior work with CLC has focused on using natural gas and syngas as fuel. However, recent work on adapting the CLC process for solid fuels shows promising results. Two main strategies for achieving this are: 1) using syngas from coal gasification in the fuel reactor and 2) introduction of the coal direct

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