期刊
FUEL PROCESSING TECHNOLOGY
卷 114, 期 -, 页码 58-68出版社
ELSEVIER
DOI: 10.1016/j.fuproc.2013.03.021
关键词
Aerosol; Biomass; Co-combustion; Fluidised bed; Sewage sludge
资金
- Portuguese Science Foundation (FCT) [PTDC/AAC-AMB/098112/2008]
- FCT [SFRH/BPD/64810/2009]
- Fundação para a Ciência e a Tecnologia [PTDC/AMB/65706/2006, PTDC/AAC-AMB/098112/2008] Funding Source: FCT
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 mu m and a geometric standard deviation of 1.27 +/- 0.01. The surface and volume mean diameters were 2.64 0.02 mu m and 2.91 +/- 0.05 mu m, 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. (c) 2013 Elsevier B.V. All rights reserved.
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