Characteristics of nanoparticles emitted from burning of biomass fuels

• Published in: Journal of environmental sciences (China) 2014-09, Vol.26 (9), p.1913-1920
• Main Authors: Hata, Mitsuhiko, Chomanee, Jiraporn, Thongyen, Thunyapat, Bao, Linfa, Tekasakul, Surajit, Tekasakul, Perapong, Otani, Yoshio, Furuuchi, Masami
• Format: Article
• Language: English
• Subjects: Biomass; Biomass burning; Combustion; Emittance; Fuels; Gases - analysis; Heating rate; Nano-particles; Nanoparticles - chemistry; Nanostructure; Organic Chemicals - analysis; Oryza sativa; Particle Size; Polycyclic aromatic hydrocarbons; Polycyclic Aromatic Hydrocarbons - analysis; Smoke; Smoke - analysis; Water-soluble organic carbon; Wood; Wood biomass; WSOC; 加热速度; 实验室规模; 水溶性有机碳; 燃烧排放; 燃烧特性; 生物质燃料; 纳米粒子
• ISSN: 1001-0742; 1878-7320
• DOI: 10.1016/j.jes.2014.07.005

The characteristics of the particles of the smoke that is emitted from the burning ofbiomass fuels were experimentally investigated using a laboratory-scale tube furnace and different types of biomass fuels： rubber wood, whole wood pellets and rice husks. Emitted amounts of particles, particle-bound polycyclic aromatic hydrocarbons （PAHs） and water-soluble organic carbon （WSOC） are discussed relative to the size of the emitted particles, ranging to as small as nano-size （〈70 nm）, and to the rate of heating rate during combustion, differential thermal analysis （DTA） and thermogravimetric analysis （TG） techniques were used to examine the effect of heating rate and biomass type on combustion behaviors relative to the characteristics of particle emissions. In the present study, more than 30% of the smoke particles from the burning ofbiomass fuel had a mass that fell within a range of 〈 100 nm. Particles smaller than 0.43 μm contributed greatly to the total levels of toxic PAHs and WSOC. The properties of these particles were influenced by the fuel component, the combustion conditions, and the particle size. Although TC--DTA results indicated that the heating rate in a range of 10-20℃did not show a significant effect on the combustion properties, there was a slight increase in the decomposition temperature as heating rate was increased. The nano-size particles had the smallest fraction of particle mass and particle-bound PAHs, but nonetheless these particles registered the largest fraction of particle-bound WSOC.