A5033698298- Atmospheric chemistry and aerosols
- Advanced Combustion Engine Technologies
- Combustion and flame dynamics
- Catalytic Processes in Materials Science
- Carbon Nanotubes in Composites
- Advanced Chemical Physics Studies
- Fullerene Chemistry and Applications
- Air Quality and Health Impacts
- Vehicle emissions and performance
- Thermochemical Biomass Conversion Processes
- Flame retardant materials and properties
- Air Quality Monitoring and Forecasting
- Thermal and Kinetic Analysis
University of Naples Federico II
2019-2024
Tecnologie Avanzate (Italy)
2023
Molecules constituting nascent soot particles have been analyzed by two-step laser desorption ionization mass spectrometry. Three samples collected from a slightly sooting ethylene/air premixed flame with the aim to investigate composition in transition nucleated just-grown particles. Sampling locations selected based on evolution of particle size distribution along axis. The spectrometric results point strong molecular composition. Just-nucleated is rich polycyclic aromatic hydrocarbons...
Recent advances in the soot studies have shown experimental evidences of π-radicals and cross-linked structures among molecular constituents just-nucleated particles. could an important role particle nucleation by increasing binding energy between polycyclic aromatic hydrocarbons with respect to pure van der Waals interactions. In this work we use density functional theory Grimme D3 dispersion correction (DFT-D3) hybrid localized Gaussian basis set (B3LYP/6-31G**) analyze classify clustering...
In this study, flame-formed carbon nanoparticles of different nanostructures have been produced by changing the flame temperature. Raman spectroscopy has used for characterization nanoparticles, while particle size obtained online measurements made electrical mobility analysis. The results show that, in agreement with recent literature data, a large variety degree graphitization, can be This methodology allows synthesis very small about 3–4 nm and graphitic orders. Under perspective material...
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The effect of ozone addition on soot formation in partially premixed laminar methane flames at two equivalence ratios, Φ = 11.9 and 7.6 (with 500 ppm 570 ozone, respectively), has been investigated. Soot particles collected the centerline several heights above burner have examined terms size, morphology, chemical/structural characteristics, by differential mobility analysis, atomic force microscopy, Raman spectroscopy respectively. results show that adding to flame reduces number particles,...
Secondary organic aerosol is formed through the atmospheric oxidation of gas-phase compounds and primary aerosols. Despite potential risks that this class particles poses to human health climate, how emissions contribute formation secondary aerosols remains largely unknown. This study examines resulting from soot nanoparticles generated by a premixed laminar ethylene–air-rich flame. The exhaust gases flame are conveyed into an flow reactor simulate conditions in which reactions occur....
ABSTRACTThere is a general consensus that soot produced by hydrocarbon combustion consists of two components, elemental carbon associated with the graphitic nanostructure and organic carbon. Despite relevance evaluating their radiative properties, particularly for carbon, knowledge spectral absorption behavior remains limited. In this work, dual-beam five wavelengths photometer used to estimate optical properties particulate matter generated laminar premixed ethylene-air flame at different...