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

Conventional CO2 capture processes have significant cost and energy penalties associated with gas separation. Chemical-looping combustion (CLC), an entirely new combustion principle avoids this difficulty by inherent CO2 capture, using metal oxides for oxygen transfer from air to fuel. The process has been demonstrated in small scale with gaseous fuels. However, with solid fuels it would be difficult to reach high fuel conversion, with the oxygen-carrier materials used so far. But a new type of combined oxides based on manganese has the ability not only to react with gaseous fuel, but also to release gaseous oxygen, which would fundamentally change the concept.The programme would provide 1) new oxygen-carrier materials with unique properties that would make this low-cost/high-efficiency option of CO2 capture possible, 2) cold-flow model investigation of suitable reactor system configurations and components, 3) a demonstration of this new combustion technology at the pilot plant level, 4) a model of the process comprising a full understanding, including kinetics, equilibria, hydrodynamics of fluidized reactors, mass and heat balances.The basis of this programme is the discovery of a number of oxygen-releasing combined manganese oxides, having properties that can make a CLC with solid fuels a break-through process for CO2 capture. The purpose of the programme is to perform a comprehensive study of these materials, to demonstrate that they work in real systems, to achieve a full understanding of how they work in interaction with solid fuels in fluidized beds and to assess how this process would work in the full scale.Climate negotiations and agreements could be significantly facilitated by this low cost option for CO2 capture which, in principle, should be applicable to 25% of the global CO2 emissions, i.e. coal fired power plants. It would also provide a future means of removing CO2 from the atmosphere at low cost by burning bio-fuel and capture CO2..

Start date 01/03/2012
End date The project is closed: 28/02/2017
Chemical-looping combustion (CLC) is a new combustion technology with inherent separation of the greenhouse gas CO2. The technology involves the use of a metal oxide as an oxygen carrier which transfers oxygen from combustion air to the fuel.
Chalmers started the development of CLC in 1998 and was first to successfully demonstrate this fundamentally new fuel conversion process in sustained operation in a 10 kW prototype unit for gaseous fuel in 2003.  Moreover, Chalmers was first to operate CLC with solid fuel (2006) and liquid fuel (2011).  Chalmers has more than 2500 h of operational experience of CLC in four units, the largest being a 100 kW dual circulating fluidized-bed for solid fuels.  This involves operation of CLC with oxygen carriers based on nickel, iron and manganese oxides, as well as natural minerals. Moreover, Chalmers has investigated more than 300 different oxygen carrier materials in laboratory. The work involves a number of breakthroughs in different aspects of chemical-looping technology. 

For further information see:
Project leader
​Anders Lyngfelt
Your contact for communications
Anders Lyngfelt's homepage:
Complete list of publications on CLC can be found at:

Funded by

  • European Commission (FP7) (Public, Belgium)

Published: Thu 31 May 2018.