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Title: Particulate emissions from the co-combustion of forest biomass and sewage sludge in a bubbling fluidised bed reactor
Author: Calvo, A. I.
Tarelho, L. A. C.
Teixeira, E. R.
Alves, C.
Nunes, T.
Duarte, M.
Coz, E.
Custodio, D.
Castro, A.
Artiñano, B.
Fraile, R.
Keywords: Aerosol
Fluidised bed
Sewage sludge
Issue Date: 2013
Publisher: Elsevier
Abstract: In the present study, particulate emissions from the co-combustion of forest biomass residues with sewage sludge in a pilot-scale bubbling fluidised bed combustor were characterised. The combustion flue gas was exhausted to the atmosphere after passing through a cyclone separator. Physical-chemical characteristics of the particles were studied: i) morphology and aerosol size, surface and volume distributions before the cyclone and ii) chemical composition (carbonates, water soluble-inorganic ions, organic and elemental carbon) before and after the cyclone. Chemical composition data were used to calculate aerosol density and refractive index. Aerosols showed a unimodal size distribution with a geometric mean diameter of 2.25 ± 0.02 μm and a geometric standard deviation of 1.27 ± 0.01. The surface and volume mean diameters were 2.64 ± 0.02 μm and 2.91 ± 0.05 μm, respectively. Water-soluble inorganic ions were predominant in the fine particle fraction (PM2.5). The filters were loaded of crystallised mineral particles. The analysis revealed a dominance of calcium carbonate/oxide and halide (NaCl or KCl), sulphate and aluminosilicate nanocrystals forming larger mixed aggregates.
Peer review: yes
DOI: 10.1016/j.fuproc.2013.03.021
ISSN: 0378-3820
Appears in Collections:CESAM - Artigos
DAO - Artigos

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