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Title

Biomass chemical looping gasification for syngas production using LD Slag as oxygen carrier in a 1.5 kWth unit

AuthorsCondori, Óscar; García Labiano, Francisco CSIC ORCID ; Diego Poza, Luis F. de ; Izquierdo Pantoja, María Teresa CSIC ORCID ; Abad Secades, Alberto CSIC ORCID ; Adánez Elorza, Juan CSIC ORCID
KeywordsBiomass
Syngas
Chemical-looping gasification
LD slag
Oxygen carrier
Issue Date24-Jul-2021
PublisherElsevier BV
CitationFuel Processing Technology 222: 106963 (2021)
AbstractBiomass Chemical Looping Gasification (BCLG) is an autothermic gasification process that provides pure syngas for many applications, including liquid biofuels production. Finding low-cost materials that can be used in the process is a key issue, especially when they come from waste. In this sense, LD Slag is a by-product of the steel industry used as an oxygen carrier in Chemical Looping Combustion with good results. This work investigates the use of LD Slag as oxygen carrier in a continuous 1.5 kW BCLG unit. The effect of the main operational variables (temperature, oxygen-to-fuel and steam-to-biomass ratios) and the use of CO instead of steam as gasification agent were analysed. LD slag allowed the process with high biomass conversions, X > 90%, carbon conversion efficiencies, η > 90%, and syngas yields, Y ≈ 0.66 Nm/kg of dry biomass, at conditions corresponding to autothermal operation. A lifetime of 300 h under reducing conditions was inferred and agglomeration problems were never detected. LD slag can be considered a suitable material for BCLG since it is possible to obtain high-quality syngas at autothermal conditions from different types of biomass with low tar generation and CO emissions.
Description12 figures, 3 tables.
Publisher version (URL)http://dx.doi.org/10.1016/j.fuproc.2021.106963
URIhttp://hdl.handle.net/10261/254548
Identifiersdoi: 10.1016/j.fuproc.2021.106963
issn: 0378-3820
Appears in Collections:(ICB) Artículos

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