DOI: 10.1016/j.atmosenv.2014.01.028
Scopus记录号: 2-s2.0-84893415484
论文题名: Effect of wood combustion conditions on the morphology of freshly emitted fine particles
作者: Torvela T ; , Tissari J ; , Sippula O ; , Kaivosoja T ; , Leskinen J ; , Virén A ; , Lähde A ; , Jokiniemi J
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2014
卷: 87 起始页码: 65
结束页码: 76
语种: 英语
英文关键词: Biomass combustion
; Emissions characterisation
; Gas-to-particle conversion
; Transmission electron microscopy
; Ultrafine particles
Scopus关键词: Biomass combustion
; Condensed organic matters
; Energy dispersive X ray spectroscopy
; Particle formation process
; Particle number size distribution
; Physical and chemical properties
; Thermodynamic equilibrium calculation
; Ultrafine particle
; Chemical analysis
; Dust
; Gas emissions
; Morphology
; Particle size
; Particle size analysis
; Soot
; Transmission electron microscopy
; X ray spectroscopy
; Combustion
; alkali
; carbon
; element
; organic carbon
; organic matter
; polycyclic aromatic hydrocarbon
; zinc oxide
; aerosol composition
; aerosol formation
; biomass burning
; combustion
; physicochemical property
; size distribution
; soot
; thermodynamics
; zinc
; article
; ash
; biomass
; calculation
; chemical composition
; combustion
; gas
; particle size
; particulate matter
; physical chemistry
; priority journal
; roentgen spectroscopy
; soot
; transmission electron microscopy
; vapor
; wood
Scopus学科分类: Environmental Science: Water Science and Technology
; Earth and Planetary Sciences: Earth-Surface Processes
; Environmental Science: Environmental Chemistry
英文摘要: The physical and chemical properties of biomass combustion-originated particles produced under controlled conditions (efficient, intermediate, and smouldering combustion) were studied. Transmission electron microscopy with energy dispersive X-ray spectroscopy was used to study the morphology and chemical composition of the size-classified samples collected from the flue gas. In addition, online-measured particle number size distributions, chemical analyses of the PM samples, and thermodynamic equilibrium calculations were used to interpret the results. The particles were composed of inorganic species and carbonaceous matter. Zinc oxide particles with an average diameter of <13nm acted as seeds for the condensation of inorganic vapours and organic material, forming ash particles with a nested structure. The outer layer was composed mainly of alkali salts. Soot and gaseous hydrocarbons were formed in high concentrations during the impaired combustion conditions. Two modes of particle size distribution were observed, with each exhibiting distinctive features. The main particle type found in the ultrafine particle size mode (<100nm) was ash. Impairing the combustion conditions increased the release of soot and condensable organics into the PM, found mainly in the accumulation particle size mode (>100nm). TEM observations of the size-classified samples revealed that condensed organic matter influenced the ash particle size and appearance. The soot morphology was also found to change, even after short periods of time, due to the presence of OM; changes in the primary particle diameter and the appearance of the agglomerates were observed. As external mixtures, the soot and ash particles were separated into two particle size modes, but both could be found as internally mixed from the accumulation mode. This result extends the current knowledge of particle formation in wood combustion, showing that the particle formation processes of ash and soot particles are largely separate. © 2014. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/80748
Appears in Collections: 气候变化事实与影响
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作者单位: University of Eastern Finland, Department of Environmental Science, P.O. Box 1627, FIN-70211 Kuopio, Finland; VTT Technical Research Centre of Finland, P.O. Box 1000, FI-02044 VTT Espoo, Finland
Recommended Citation:
Torvela T,, Tissari J,, Sippula O,et al. Effect of wood combustion conditions on the morphology of freshly emitted fine particles[J]. Atmospheric Environment,2014-01-01,87