TY - JOUR
T1 - Analyzing the solid soot particulates formed in a fuel-rich flame by solvent-free MALDI FT ICR mass spectrometry.
AU - Zhang, Wen
AU - Shao, Can
AU - Sarathy, Mani
N1 - KAUST Repository Item: Exported on 2020-10-01
Acknowledged KAUST grant number(s): OSR-1026-CRG5-C3033
Acknowledgements: The work was supported by the KAUST Office of Sponsored Research (OSR) under Award No. OSR-1026-CRG5-C3033, and Saudi Aramco under the FUELCOM program. This research used resources of the Core Labs of King Abdullah University of Science and Technology (KAUST).
PY - 2020/1/15
Y1 - 2020/1/15
N2 - RATIONALE:The compositional and structural information of the soot particles is essential for a better understanding of the chemistry and mechanism during the combustion. The aim of the present study was to develop a method to analyze such soot particulate samples with high complexity and poor solubility. METHODS:The solvent-free sample preparation MALDI technique was combined with the ultrahigh resolution FT ICR mass spectrometry for the characterization of solid soot particulates. Moreover, a modified iso-abundance plot (Carbon Number vs. Hydrogen Number vs. Abundance) was introduced to visualize the distributions of various chemical species, and to examine the agreement between the hydrogen- abstraction- carbon- addition (HACA) mechanism and the polycyclic aromatic hydrocarbon growth in the investigated flame system. RESULTS:This solvent-free MALDI method enabled the effective ionization of the solid soot particulates without any dissolving procedure. With the accurate m/z ratios from FT ICR MS, a unique chemical formula was assigned to each of the recorded mass signals. The combustion products were proven to be mainly large polycyclic aromatic hydrocarbons, together with a small amount (
AB - RATIONALE:The compositional and structural information of the soot particles is essential for a better understanding of the chemistry and mechanism during the combustion. The aim of the present study was to develop a method to analyze such soot particulate samples with high complexity and poor solubility. METHODS:The solvent-free sample preparation MALDI technique was combined with the ultrahigh resolution FT ICR mass spectrometry for the characterization of solid soot particulates. Moreover, a modified iso-abundance plot (Carbon Number vs. Hydrogen Number vs. Abundance) was introduced to visualize the distributions of various chemical species, and to examine the agreement between the hydrogen- abstraction- carbon- addition (HACA) mechanism and the polycyclic aromatic hydrocarbon growth in the investigated flame system. RESULTS:This solvent-free MALDI method enabled the effective ionization of the solid soot particulates without any dissolving procedure. With the accurate m/z ratios from FT ICR MS, a unique chemical formula was assigned to each of the recorded mass signals. The combustion products were proven to be mainly large polycyclic aromatic hydrocarbons, together with a small amount (
UR - http://hdl.handle.net/10754/660446
UR - https://onlinelibrary.wiley.com/doi/abs/10.1002/rcm.8596
UR - http://www.scopus.com/inward/record.url?scp=85078288468&partnerID=8YFLogxK
U2 - 10.1002/rcm.8596
DO - 10.1002/rcm.8596
M3 - Article
C2 - 31756786
SN - 0951-4198
VL - 34
JO - Rapid communications in mass spectrometry : RCM
JF - Rapid communications in mass spectrometry : RCM
IS - 4
ER -