Fly Ash Formation and Characteristics from (co-)Combustion of an Herbaceous Biomass and a Greek Lignite (Low-Rank Coal) in a Pulverized Fuel Pilot-Scale Test Facility

Aaron Fuller, Jörg Maier, Emmanouil Karampinis, Jana Kalivodova, Panagiotis Grammelis, Emmanuel Kakaras and Günter Scheffknecht
Additional contact information
Aaron Fuller: Institute of Combustion and Power Plant Technology, University of Stuttgart, Pfaffenwaldring 23, 70569 Stuttgart, Germany
Jörg Maier: Institute of Combustion and Power Plant Technology, University of Stuttgart, Pfaffenwaldring 23, 70569 Stuttgart, Germany
Emmanouil Karampinis: Centre for Research & Technology Hellas/Chemical Process and Energy Resources Institute (CERTH/CPERI), Egialias 52, 15125 Marousi, Athens, Greece
Jana Kalivodova: The Energy Research Center of The Netherlands (ECN), Biomass, Coal and Environmental Research, Heat and Power Generation, P.O. Box 1, 1755 ZG Petten, The Netherlands
Panagiotis Grammelis: Centre for Research & Technology Hellas/Chemical Process and Energy Resources Institute (CERTH/CPERI), Egialias 52, 15125 Marousi, Athens, Greece
Emmanuel Kakaras: Centre for Research & Technology Hellas/Chemical Process and Energy Resources Institute (CERTH/CPERI), Egialias 52, 15125 Marousi, Athens, Greece
Günter Scheffknecht: Institute of Combustion and Power Plant Technology, University of Stuttgart, Pfaffenwaldring 23, 70569 Stuttgart, Germany

Energies, 2018, vol. 11, issue 6, 1-38

Abstract: The lignite boilers are designed for lower quality fuels, and often the ash is not utilized. This work assessed the impact of combustion of an herbaceous biomass with a low-quality Greek lignite on the quality of the resulting fly ash. Test results were compared with those of fly ash samples from an industrial facility using the same fuel qualities. Inductively coupled plasma-optical (ICP) emission spectroscopy, X-ray powder diffraction (XRD), and scanning electron microscope (SEM) analyses were performed on the collected samples. Despite the significantly higher contents of K, Na and S in the biomass, at a 50% co-firing thermal share, the major and minor oxides in the fly ash were comparable to the lignite fly ash quality. This is attributed to the high ash content of the lignite, the low ash content of the biomass, and the much higher heating value of the biomass. There were improvements in fly ash performance characteristics with the herbaceous biomass in the fuel blend. The initial setting time and volume stability evaluations were improved with the biomass in the fuel blend. The work supports efforts of good practices in ash management, social responsibility, a circular economy, power plant renewable energy operations, and co-firing herbaceous biomass fuels in lignite power plants.

Keywords: bioenergy; co-firing; renewable energy; biomass fly ash; herbaceous biomass; by-products; recycled wastes; sustainable energy (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2018
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (9)

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