Rainer Backman
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View article: Thermodynamic Analysis on the Fate of Ash Elements in Chemical Looping Combustion of Solid Fuels─Iron-Based Oxygen Carriers
Thermodynamic Analysis on the Fate of Ash Elements in Chemical Looping Combustion of Solid Fuels─Iron-Based Oxygen Carriers Open
Chemical looping combustion (CLC) enables efficient combustion of hydrocarbon fuels while also producing a gas stream with high CO2 concentrations, suitable for carbon capture and storage (CCS). CLC of biomass in combination with CCS resul…
View article: Thermodynamic Equilibrium Study on the Melting Tendency of the K-Ca-Mg-P-Si-O System with Relevance to Woody and Agricultural Biomass Ash Compositions
Thermodynamic Equilibrium Study on the Melting Tendency of the K-Ca-Mg-P-Si-O System with Relevance to Woody and Agricultural Biomass Ash Compositions Open
A major challenge in the combustion of biomass fuels is the heterogeneity of ash-forming elements, which may cause a wide range of ash-related problems. Understanding the melting tendency of the coarse ash fractions is necessary to mitigat…
View article: Fate of trace elements in Oxygen Carrier Aided Combustion (OCAC) of municipal solid waste
Fate of trace elements in Oxygen Carrier Aided Combustion (OCAC) of municipal solid waste Open
Oxygen Carrier Aided Combustion is a novel fluidized bed concept for burning waste. This study analyzed solid samples from an industrial OCAC application using municipal solid waste and the oxygen carrier ilmenite. The presence of oxygen c…
View article: Fate of lead, copper, zinc and antimony during chemical looping gasification of automotive shredder residue
Fate of lead, copper, zinc and antimony during chemical looping gasification of automotive shredder residue Open
Gasification experiments in this study were performed in a 2–4 MW indirect gasifier coupled to a semi-commercial CFB combustor at Chalmers University of Technology. Experiments were carried out during 13 days with automotive shredder resid…
View article: Oxygen carrier aided combustion (OCAC) of two waste fuels - Experimental and theoretical study of the interaction between ilmenite and zinc, copper and lead
Oxygen carrier aided combustion (OCAC) of two waste fuels - Experimental and theoretical study of the interaction between ilmenite and zinc, copper and lead Open
Zinc, copper and lead are amongst the more abundant trace metals in waste fuels such as municipal solid waste and recovered waste wood. The ashes from waste fuels could contain high contents of these metals, which could be valuable but als…
View article: Slag Formation during Entrained Flow Gasification: Calcium-Rich Bark Fuel with KHCO<sub>3</sub> Additive
Slag Formation during Entrained Flow Gasification: Calcium-Rich Bark Fuel with KHCO<sub>3</sub> Additive Open
Slag property management is of utmost importance for successful operation of entrained flow gasifiers. The present study investigates the influence of potassium introduced as KHCO3 on the ash and slag formation of softwood bark, a calcium-…
View article: Time-Resolved Study of Silicate Slag Formation During Combustion of Wheat Straw Pellets
Time-Resolved Study of Silicate Slag Formation During Combustion of Wheat Straw Pellets Open
Ash formation during single-fuel pellet combustion of wheat straw at 700 and 1000 °C was studied throughout fuel conversion by quench cooling and analysis at different char conversion degrees. The combination of X-ray microtomography analy…
View article: Alloy degradation in a co-firing biomass CFB vortex finder application at 880 °C
Alloy degradation in a co-firing biomass CFB vortex finder application at 880 °C Open
Mechanisms of alloy degradation in a fireside N-S-O-C-H-Cl-Na-K atmosphere at 880 degrees C were elucidated using SEM-EDS, chemical equilibrium calculations, and XRD. Alloys 310S, 800H/HT, and 600 were studied after 0, 8000, and 16,000 h e…
View article: Char Conversion Characterized by Synchrotron Based X-ray Micro-Tomography and SEM-EDS Analysis
Char Conversion Characterized by Synchrotron Based X-ray Micro-Tomography and SEM-EDS Analysis Open
Fuel and ash properties were studied during fuel conversion by careful examination of char samples at different degrees of char oxidation. Two types of lignocellulosic pellets with different compositions of ash forming elements were used: …