NDLI: Alkali Activation–Granulation of Hazardous Fluidized Bed Combustion Fly Ashes

Content Provider	Springer Nature Link
Author	Yliniemi, Juho Pesonen, Janne Tanskanen, Pekka Peltosaari, Olli Tiainen, Minna Nugteren, Henk Illikainen, Mirja
Copyright Year	2016
Abstract	The increasing amount of fluidized bed combustion (FBC) ash is putting pressure on researchers to invent novel methods for utilizing the ash. The low reactivity and heavy metal content constrict the use of FBC ash in the same way as coal ash from pulverized combustion. Four FBC fly ashes from different power plants were granulated with sodium silicate solution in order to produce artificial aggregates. All aggregates matched the definition for lightweight aggregate according to the EN 13055-1 standard. The strongest aggregates were produced from fly ashes that had the highest X-ray amorphous material content and the highest amount of selectively soluble SiO$_{2}$ and Al$_{2}$O$_{3}$. However, the same leaching problem (leaching of the anionic species) as with coal fly ashes was observed with the FBC fly ashes. The simultaneous high shear granulation and alkali activation of FBC ashes showed that artificial aggregates with satisfactory physical properties, such as density and strength, can be obtained even from low-reactive fly ashes that contain heavy metals.
Starting Page	339
Ending Page	348
Page Count	10
File Format	PDF
ISSN	18772641
Journal	Waste and Biomass Valorization
Volume Number	8
Issue Number	2
e-ISSN	1877265X
Language	English
Publisher	Springer Netherlands
Publisher Date	2016-05-26
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Alkali activation Fluidised bed combustion Fly ash Heavy metal Lightweight aggregate Granulation Engineering Environment Renewable and Green Energy Industrial Pollution Prevention Waste Management/Waste Technology Environmental Engineering/Biotechnology
Content Type	Text
Resource Type	Article
Subject	Waste Management and Disposal Environmental Engineering Renewable Energy, Sustainability and the Environment

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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