首页|Optical characterization of nano-sized organic carbon particles emitted from a small gasoline engine

Optical characterization of nano-sized organic carbon particles emitted from a small gasoline engine

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The nano-sized organic carbon (NOC) particles emitted from a small gasoline engine were characterized using various ex situ optical techniques to assess their hazardous impact.The exhaust gas was sampled iso-kinetically by a quartz probe and passed through de-ionized water to gather the hydrophilic carbonaceous particulates as hydrosol.The hydrodynamic diameter of the particles ranged between 1.7 and 3.6 nm at no load,with a mean diameter of 2.4 nm.The particle size in the engine exhaust was found to increase at higher loads,which is attributed to coagulation of the particles.The chemical structure of the particles was analyzed using UV-vis and infra-red spectroscopy.Both the band gap energy and oscillator strength data evaluated from the UV-vis absorbance showed that the NOC particles contained polyaromatic hydrocarbon structures with three to five aromatic rings.Infra-red spectroscopy analysis further confirmed the presence of aliphatic and carbonyl functionalities in the aromatic structures of the particles.The fine size of the particles,their high number concentration for the type of the engine under study and their structural features,make the particles extremely hazardous for environment and health.

Gasoline engineCombustionEmissionCarbon nano-particleCharacterization

Bireswar Paul、Amitava Datta、Aparna Datta、Abhijit Saha

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Department of Power Engineering, Jadavpur University, Salt Lake Campus, Kolkata 700098, India

UGC-DAE Consortium for Scientific Research, Kolkata 700098, India

One of the authors (B.Paul) gratefully acknowledges the support from Council of Scientific and Industrial Research (CSIR),Govt.oSaha Institute of Nuclear Physics,Kolkata for extending the TEM facility

9/9606222K10-EMR-I

2013

颗粒学报(英文版)
中国颗粒学会　中国科学院过程工程研究所

颗粒学报(英文版)

CSTPCDCSCDSCIEI
影响因子：0.632
ISSN：1674-2001
年,卷(期)：2013.11(3)
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