Chemical-looping combustion of synthetic biomass-volatiles with manganese-ore oxygen carriers
Journal article, 2018

Carbon capture and storage of CO2 from combustion of biomass, i.e., bio-energy carbon capture and storage (BECCS), makes it possible to obtain so-called negative emissions – the atmosphere is cleansed from carbon dioxide. The purpose of the present study was to investigate the suitability of different manganese ores as oxygen carriers in chemical-looping combustion of biomass fuels. For this screening study, a laboratory-scale, circulating fluidized-bed CLC system with a nominal fuel input of 300 Wth was used. The primary focus was to investigate the reactivity of these oxygen carriers towards biomass fuels, and find a reactive oxygen carrier with sufficient mechanical stability that could be suitable for large-scale chemical-looping combustion of biomass. A synthetic “biomass volatiles” gas was used to study how the different gas components react with the oxygen-carrier particles. Additional experiments were conducted with methane and a syngas. Parameter studies concerning temperature and specific fuel-reactor bed mass (bed mass per fuel thermal power in kg/MWth) were carried out. With the synthetic biomass volatiles, conversion of fuel carbon to CO2 as high as 97.6% was achieved. For a majority of the investigated ores, essentially all C2 and C3 hydrocarbons were converted, as well as a very high fraction of the CO. Reactivity towards CH4 was generally lower, but improved at higher temperatures. The resistance of the oxygen carriers towards mechanical degradation was measured in a jet-cup attrition test rig. The measured attrition was estimated as “intermediate” for four of the five tested materials, while one of the ores displayed high attrition.

CO2 capture

carbon capture and storage (CCS)

manganese ore

Fluidized Bed Conversion

chemical-looping combustion (CLC)




Patrick Moldenhauer

Chalmers, Space, Earth and Environment, Energy Technology

Sebastian Sundqvist

Chalmers, Chemistry and Chemical Engineering, Energy and Material, Environmental Inorganic Chemistry

Tobias Mattisson

Chalmers, Space, Earth and Environment, Energy Technology

Carl Johan Linderholm

Chalmers, Space, Earth and Environment, Energy Technology

International Journal of Greenhouse Gas Control

1750-5836 (ISSN)

Vol. 71 239-252

Driving Forces

Sustainable development

Subject Categories

Materials Engineering

Energy Engineering

Environmental Engineering

Energy Systems

Areas of Advance




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