In order to burn a fuel you have to supply oxygen which is usually done with a flow of air. However, since the main fraction of air is nitrogen this results in off-gases that also contain large quantities of nitrogen. A way to get around this problem is to instead supply the oxygen via a solid metal oxide, or oxygen carrier, which can readily be separated from the gas stream, hence providing nitrogen free off-gases. Part I of this project will investigate if oxide scales and other waste material can be used as oxygen carriers to enhance combustion, reforming, gasification and in CO2-capture from biomass. Part II of the project will investigate how to treat depleted oxygen carrier in order to reuse them as oxygen carrier or as raw material in the metallurgical industry. A wider search for other commercial available material will also be conducted. The obtained material will then be tested with respect to fuel reactivity. Which of the biofuel ash components that is problematic for the oxygen carriers will be experimentally established. Also thermodynamic calculations will be carried out on witch phases in ash and oxygen carrier that might interact. The project will then investigate if it is possible to regenerate oxygen carriers with the options of either reusing them either as oxygen carriers or as a product for in the metallurgical industry.
Docent vid Chalmers University of Technology, Chemistry and Chemical Engineering, Energy and Material, Environmental Inorganic Chemistry
Funding Chalmers participation during 2015–2018 with 6,183,000.00 SEK