University of Oulu

Ohenoja, K.; Pesonen, J.; Yliniemi, J.; Illikainen, M. Utilization of Fly Ashes from Fluidized Bed Combustion: A Review. Sustainability 2020, 12, 2988.

Utilization of fly ashes from fluidized bed combustion: : a review

Saved in:
Author: Ohenoja, Katja1; Pesonen, Janne2; Yliniemi, Juho1;
Organizations: 1Fibre and Particle Engineering Research Unit, Faculty of Technology, University of Oulu, P.O. Box 4300, 90014 Oulu, Finland
2Research Unit of Sustainable Chemistry, Faculty of Technology, University of Oulu, P.O. Box 4300, 90014 Oulu, Finland
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 2.4 MB)
Persistent link:
Language: English
Published: Multidisciplinary Digital Publishing Institute, 2020
Publish Date: 2020-06-10


Traditionally fly ash is thought to be glassy, spherical particle originating from pulverized coal combustion (PCC) at temperature up to 1700 °C. However, nowadays fluidized bed combustion (FBC) technology is spreading quickly around the world as it is an efficient and environmentally friendly method. FBC is also able to utilize mixtures of low-grade solid fuels (e.g., coal, lignite, biomass, and waste) that have fluctuating quality, composition, and moisture contents. However, this leads to a high variation in the produced fly ash quality, unlike PCC fly ash, and hence challenges when attempting to utilize this fly ash. In this study, the utilization of fluidized bed combustion fly ash (FBCFA) was reviewed using the Scopus database. The most promising utilization target for FBCFA from biomass combustion is as a fertilizer and soil amendment. In construction, the FBCFA from various fuels is utilized as cement replacement material, in non-cement binders, as lightweight aggregates and cast-concrete products. Other types of construction applications include mine backfilling material, soil stabilizer, and road construction material. There are also other promising applications for FBCFA utilization, such as catalysts support material and utilization in waste stabilization.

see all

Series: Sustainability
ISSN: 2071-1050
ISSN-E: 2071-1050
ISSN-L: 2071-1050
Volume: 12
Issue: 7
Article number: 2988
DOI: 10.3390/su12072988
Type of Publication: A2 Review article in a scientific journal
Field of Science: 218 Environmental engineering
Funding: This work was done under the auspices of the ARCTIC-ecocrete project, which is supported by Interreg Nord EU-program and the Regional Council of Lapland.
Copyright information: © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (