Combustion characteristics of sewage sludge solid fuels produced by drying and hydrothermal carbonization in a fluidized bed

Hyungjun Ahn, Donghee Kim and Youngjae Lee

Renewable Energy, 2020, vol. 147, issue P1, 957-968

Abstract: The current study presents the experimental results investigating combustion characteristics of sewage sludge fuels (SS) reference to coal and wood pellet as the two typical base fuels. Two types of SS were produced by drying and hydrothermal carbonization technology. The composition analysis and the thermogravimetric analysis (TGA) showed that SS were highly volatile with low ignition temperature than coal and wood pellet. In the lab-scale bubbling fluidized bed experiments, the combustion gas composition and bed temperature were measured for the cases of single fuel and blended fuel. The morphology and the composition of fly ash collected at the cyclone were analyzed using particle size analyzer, ICP-OES, and SEM-EDS. In the single fuel cases, NOx and SO2 emission of SS were several times higher than the base fuels, but those could be reduced in the blend fuel cases while maintaining overall thermal input and bed temperature. The different size distribution and overall composition of fly ash for the single fuel cases became similar in the blend fuel cases. The change in the characteristics of fly ash was considered to be related to the distribution of mineral matters, such as Ca, K, and P in particular.

Keywords: Sewage sludge; Hydrothermal carbonization; Co-combustion; Fluidized bed (search for similar items in EconPapers)
Date: 2020
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (7)

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S0960148119313874
Full text for ScienceDirect subscribers only

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:147:y:2020:i:p1:p:957-968

DOI: 10.1016/j.renene.2019.09.057

Access Statistics for this article

Renewable Energy is currently edited by Soteris A. Kalogirou and Paul Christodoulides

More articles in Renewable Energy from Elsevier
Bibliographic data for series maintained by Catherine Liu ().