Evaluating Biomass Ash Properties as Influenced by Feedstock and Thermal Conversion Technology towards Cement Clinker Production with a Lower Carbon Footprint

Purpose : This study evaluates the potential of biomass ash as raw clinker material and the influence of biomass feedstock and thermal conversion technology on biomass ash properties. Methods : A set of criteria for biomass feedstock and ash properties (i.e. CaO/SiO 2 ratio and burnability) are esta...

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Bibliographic Details
Published in:Waste and biomass valorization 2021-08, Vol.12 (8), p.4703-4719
Main Authors: Tosti, Lorenzo, van Zomeren, André, Pels, Jan R., Comans, Rob N. J.
Format: Article
Language:English
Subjects:
Aluminum
Bark
Biomass
Biomass burning
Calcium oxide
Carbon dioxide
Carbon dioxide emissions
Carbon footprint
Cement
Clinker
Combustion
Conversion
Engineering
Environment
Environmental Engineering/Biotechnology
Fly ash
Fuel combustion
Hardwoods
Industrial Pollution Prevention
Minerals
Original Paper
Phosphorus pentoxide
Pulverized fuels
Raw materials
Renewable and Green Energy
Silicon dioxide
Sludge
Sustainable development
Waste Management/Waste Technology
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Summary:Purpose : This study evaluates the potential of biomass ash as raw clinker material and the influence of biomass feedstock and thermal conversion technology on biomass ash properties. Methods : A set of criteria for biomass feedstock and ash properties (i.e. CaO/SiO 2 ratio and burnability) are established. A large dataset was collected and the best combination of biomass feedstock and conversion technology regarding the desired ash quality was identified. Results : Wood biomass has the highest potential to provide the right CaO/SiO 2 ratio which is needed to form clinker minerals. Bark content and exogenous Si inclusion in wood biomass have a large influence on the CaO/SiO 2 ratio. Paper sludge is composed of Ca, Si and Al and can potentially serve as a source of cement elements. Wood fly ash from pulverized fuel combustion can substitute a considerable amount of raw clinker materials due to its similar burnability. The replacement ratio is determined by the content of adverse elements in the ash (i.e. MgO 2 and P 2 O 5 ). Conclusion : Using biomass ash to lower the CO 2 emission from clinker production depends on the joint effort of bioenergy producers, by providing higher quality biomass ash, and cement makers, by adapting the kiln operation to enable a high level of raw material replacement by biomass ash.The presented evaluation of the ash production chain, from biomass selection through combustion technology and ash management, provides new insights and recommendations for both stakeholders to facilitate this sustainable development. Graphic Abstract
ISSN:1877-2641
1877-265X
DOI:10.1007/s12649-020-01339-0