Oxy-Fuel Combustion of Hard Coal, Wheat Straw, and Solid Recovered Fuel in a 200 kW<sub>th</sub> Calcium Looping CFB Calciner

The fluidized bed combustion (FBC) of biomass and solid recovered fuel (SRF) is globally emerging as a viable solution to achieve net-negative carbon emissions in the heat and power sector. Contrary to conventional fossil fuels, alternative fuels are highly heterogeneous, and usually contain increas...

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Main Authors: Joseba Moreno, Matthias Hornberger, Max Schmid, Günter Scheffknecht
Format: Article
Language:English
Published: MDPI AG 2021-04-01
Series:Energies
Subjects:
Online Access:https://www.mdpi.com/1996-1073/14/8/2162
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spelling doaj-1ac1a1a7ba2b4b3d98fd7449c28a4da02021-04-13T23:03:30ZengMDPI AGEnergies1996-10732021-04-01142162216210.3390/en14082162Oxy-Fuel Combustion of Hard Coal, Wheat Straw, and Solid Recovered Fuel in a 200 kW<sub>th</sub> Calcium Looping CFB CalcinerJoseba Moreno0Matthias Hornberger1Max Schmid2Günter Scheffknecht3Institute of Combustion and Power Plant Technology (IFK), University of Stuttgart, Pfaffenwaldring 23, 70569 Stuttgart, GermanyInstitute of Combustion and Power Plant Technology (IFK), University of Stuttgart, Pfaffenwaldring 23, 70569 Stuttgart, GermanyInstitute of Combustion and Power Plant Technology (IFK), University of Stuttgart, Pfaffenwaldring 23, 70569 Stuttgart, GermanyInstitute of Combustion and Power Plant Technology (IFK), University of Stuttgart, Pfaffenwaldring 23, 70569 Stuttgart, GermanyThe fluidized bed combustion (FBC) of biomass and solid recovered fuel (SRF) is globally emerging as a viable solution to achieve net-negative carbon emissions in the heat and power sector. Contrary to conventional fossil fuels, alternative fuels are highly heterogeneous, and usually contain increased amounts of alkaline metals and chlorine. Hence, experimental studies are mandatory in order to thoroughly characterize the combustion behavior and pollutant formation of non-conventional fuels in novel applications. This work gives an overview of experimental investigations on the oxy-fuel combustion of hard coal, wheat straw, and SRF with a limestone bed in a semi-industrial circulating fluidized bed (CFB) pilot plant. The CFB combustor was able to be operated under different fuel blending ratios and inlet O<sub>2</sub> concentrations, showing a stable hydrodynamic behavior over many hours of continuous operation. The boundary conditions introduced in this study are expected to prevail in carbon capture and storage (CCS) processes, such as the oxy-fuel combustion in the CFB calciner of a Calcium Looping (CaL) cycle for post-combustion CO<sub>2</sub> capture.https://www.mdpi.com/1996-1073/14/8/2162oxy-fuel combustioncarbon capturebiomass combustionSRF combustionfluidized bed combustionco-firing
collection DOAJ
language English
format Article
sources DOAJ
author Joseba Moreno
Matthias Hornberger
Max Schmid
Günter Scheffknecht
spellingShingle Joseba Moreno
Matthias Hornberger
Max Schmid
Günter Scheffknecht
Oxy-Fuel Combustion of Hard Coal, Wheat Straw, and Solid Recovered Fuel in a 200 kW<sub>th</sub> Calcium Looping CFB Calciner
Energies
oxy-fuel combustion
carbon capture
biomass combustion
SRF combustion
fluidized bed combustion
co-firing
author_facet Joseba Moreno
Matthias Hornberger
Max Schmid
Günter Scheffknecht
author_sort Joseba Moreno
title Oxy-Fuel Combustion of Hard Coal, Wheat Straw, and Solid Recovered Fuel in a 200 kW<sub>th</sub> Calcium Looping CFB Calciner
title_short Oxy-Fuel Combustion of Hard Coal, Wheat Straw, and Solid Recovered Fuel in a 200 kW<sub>th</sub> Calcium Looping CFB Calciner
title_full Oxy-Fuel Combustion of Hard Coal, Wheat Straw, and Solid Recovered Fuel in a 200 kW<sub>th</sub> Calcium Looping CFB Calciner
title_fullStr Oxy-Fuel Combustion of Hard Coal, Wheat Straw, and Solid Recovered Fuel in a 200 kW<sub>th</sub> Calcium Looping CFB Calciner
title_full_unstemmed Oxy-Fuel Combustion of Hard Coal, Wheat Straw, and Solid Recovered Fuel in a 200 kW<sub>th</sub> Calcium Looping CFB Calciner
title_sort oxy-fuel combustion of hard coal, wheat straw, and solid recovered fuel in a 200 kw<sub>th</sub> calcium looping cfb calciner
publisher MDPI AG
series Energies
issn 1996-1073
publishDate 2021-04-01
description The fluidized bed combustion (FBC) of biomass and solid recovered fuel (SRF) is globally emerging as a viable solution to achieve net-negative carbon emissions in the heat and power sector. Contrary to conventional fossil fuels, alternative fuels are highly heterogeneous, and usually contain increased amounts of alkaline metals and chlorine. Hence, experimental studies are mandatory in order to thoroughly characterize the combustion behavior and pollutant formation of non-conventional fuels in novel applications. This work gives an overview of experimental investigations on the oxy-fuel combustion of hard coal, wheat straw, and SRF with a limestone bed in a semi-industrial circulating fluidized bed (CFB) pilot plant. The CFB combustor was able to be operated under different fuel blending ratios and inlet O<sub>2</sub> concentrations, showing a stable hydrodynamic behavior over many hours of continuous operation. The boundary conditions introduced in this study are expected to prevail in carbon capture and storage (CCS) processes, such as the oxy-fuel combustion in the CFB calciner of a Calcium Looping (CaL) cycle for post-combustion CO<sub>2</sub> capture.
topic oxy-fuel combustion
carbon capture
biomass combustion
SRF combustion
fluidized bed combustion
co-firing
url https://www.mdpi.com/1996-1073/14/8/2162
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AT gunterscheffknecht oxyfuelcombustionofhardcoalwheatstrawandsolidrecoveredfuelina200kwsubthsubcalciumloopingcfbcalciner
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