Show/Hide Menu
Hide/Show Apps
Logout
Türkçe
Türkçe
Search
Search
Login
Login
OpenMETU
OpenMETU
About
About
Open Science Policy
Open Science Policy
Open Access Guideline
Open Access Guideline
Postgraduate Thesis Guideline
Postgraduate Thesis Guideline
Communities & Collections
Communities & Collections
Help
Help
Frequently Asked Questions
Frequently Asked Questions
Guides
Guides
Thesis submission
Thesis submission
MS without thesis term project submission
MS without thesis term project submission
Publication submission with DOI
Publication submission with DOI
Publication submission
Publication submission
Supporting Information
Supporting Information
General Information
General Information
Copyright, Embargo and License
Copyright, Embargo and License
Contact us
Contact us
Analysis of exhausts emitted by i.c. engines and stationary burners, by means of u.v. extinction and fluorescence spectroscopy
Date
2001-02-01
Author
Merola, SS
Gambi, G
Allouis, Christophe Gerard
Beretta, F
Borghese, A
D'Alessio, A
Metadata
Show full item record
This work is licensed under a
Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License
.
Item Usage Stats
115
views
0
downloads
Cite This
Optical investigations of the exhausts emitted by internal combustion (i.c.) engines and a stationary burner were performed, in order to assess their relative role as sources of organic matter to the atmosphere. Extinction spectra of air-diluted exhausts in the 200-400 nm u.v. band reveal the expected existence of gaseous trace-species (NO, NO2 and SO2) and carbonaceous particulate matter (soot). In addition. after subtracting the absorption contribution from known species, a strong residual absorption band remains below 250 nm, which is attributed to organic aromatic matter, involving no more than two aromatic rings. A set of ex situ extinction and laser induced fluorescence (LIF) experiments were carried out on condensed combustion-water samples. Extinction measurements from the water samples show absorption spectra similar to those observed from air-diluted samples, which are attributed to low volatility organic compounds, as they are trapped in the condensed phase. Combining the indications of extinction data for both air-diluted and condensed samples, it is suggested that the absorbing species might be molecular clusters of one/two aromatic rings. LIF spectra from condensed samples evidence two fluorescence bands, centered above 300 and 400 nm, respectively, whose intensities correlate with the combustion regimes. Analogous optical analysis on rain samples, collected in an urban area, showed that rain absorption and fluorescence spectra are similar to those found in condensed exhaust samples, which is consistent with the prevailing contribution of i.c. engines to the urban air pollution. The combined experimental data suggest that the absorbing and fluorescent species trapped in the condensed samples are organic (aromatic) compounds, involving mostly one-two aromatic rings structural units, since they do not absorb above 250 nm. The overall molecular weight of the trapped material is likely heavy as they show low volatility. (C) 2001 Elsevier Science Ltd. All rights reserved.
URI
https://hdl.handle.net/11511/89897
Journal
CHEMOSPHERE
DOI
https://doi.org/10.1016/s0045-6535(00)00257-5
Collections
Department of Mechanical Engineering, Article
Suggestions
OpenMETU
Core
Characterization of Particulate Matter Emitted from Combustion of Various Biomasses in O-2/N-2 and O-2/CO2 Environments
Ruscio, Amanda; Kazanç Özerinç, Feyza; Levendis, Yiannis A. (American Chemical Society (ACS), 2014-01-01)
This work reports on the physical and chemical characteristics of the ashes of biomass residues burned in air as well as in simulated dry oxy-combustion conditions. Three pulverized biomass residues (olive residue, corn residue, and torrefied pine sawdust) were burned in a laboratory-scale laminar-flow drop tube furnace heated to 1400 K. Olive residue resulted in by far the largest particulate yields both submicrometer (PM1) and supermicrometer (PM1-18)-whereas torrefied pine sawdust resulted in the lowest....
Characterization and utilization potential of class F fly ashes
Acar, İlker; Atalay, Mustafa Ümit; Department of Mining Engineering (2013)
In this thesis, characterization of two class F fly ashes (FA) from Çatalağzı and Sugözü thermal power plants were carried out and their utilization potentials in three different fields were examined. Characterization of sintered samples and determination of their utilization potentials in ceramic industry is the first research area in this thesis. For this purpose, the class F fly ash samples were first pressed into cylindrical specimen without the addition of any organic binders or inorganic additives, an...
Investigation of copolymers of thiophene-functionalized polystyrene with pyrrole by pyrolysis mass spectrometry
Papila, Ozge; Toppare, Levent Kamil; Hacaloğlu, Jale (2006-06-01)
The thermal and structural characterization of electrochemically synthesized thiophene-functionalized polystyrene and pyrrole (PS/PPy) and their copolymers were investigated by direct pyrolysis mass spectrometry. The pyrolysis data confirmed the growth of polypyrrole onto the pendant thiophene moiety of polystyrene. It is determined that the electrolytic film has different properties from the mechanical mixture and the related homopolymers.
Determination of kinetic parameters and hydrogen desorption characteristics of MgH2-10 wt% (9Ni-2Mg-Y) nano-composite
Pourabdoli, Mehdi; Raygan, Shahram; Abdizadeh, Hossein; Üner, Deniz (2013-09-10)
Hydrogen desorption kinetic parameters of MgH2 compounds were measured and compared with published gas solid reaction models. The compounds investigated in this study were as-received MgH2, ball milled MgH2, and MgH2 ball milled with 9Ni-2Mg-Y catalyst compound. It was determined that different models were necessary to fit the hydrogen desorption data collected at different temperatures on the same sample, indicating that desorption mechanisms changed with respect to temperature. Addition of (9Ni-2Mg-Y) all...
Characterization of gas turbine burner instabilities by wavelet analysis of infrared images
Allouis, Christophe Gerard; Amoresano, A.; Langella, G.; Niola, V.; Quaremba, G. (2016-05-01)
In this paper, an optical approach is tested to spatially characterize combustion fluctuations in a single burner atmospheric gas turbine test rig. The target of present investigation was to test the optical technique during combustion tests campaign, in order to couple it to an acoustic one in a future activity to be developed on the same experimental setup. The analysis based on fast infrared imaging of flames, coupled with photomultiplier and microphones measurements, has been elaborated on a 3 MW gas tu...
Citation Formats
IEEE
ACM
APA
CHICAGO
MLA
BibTeX
S. Merola, G. Gambi, C. G. Allouis, F. Beretta, A. Borghese, and A. D’Alessio, “Analysis of exhausts emitted by i.c. engines and stationary burners, by means of u.v. extinction and fluorescence spectroscopy,”
CHEMOSPHERE
, pp. 827–834, 2001, Accessed: 00, 2021. [Online]. Available: https://hdl.handle.net/11511/89897.