Abstract
As byproducts of the combustion process of hydrocarbon fuels, soot particles are difficult to remove, and they can greatly harm human health and pollute the environment. Therefore, the formation and growth processes of the soot particles has become a study focus of researchers. In this paper, the nanostructure and oxidation reactivity of carbonaceous particles collected from ethylene inverse diffusion flames with or without the additions of three pentanol isomers (1-pentanol, 3-methyl-1-butanol, and 2-methyl-1-butanol) were investigated in detail. The nanostructure and oxidation characteristics of nascent soot particles were characterized using high resolution transmission electron microscopy (HRTEM), X-ray diffractometry (XRD) and thermogravimetric analysis (TGA). It was found that the nascent soot cluster of pure ethylene flame had a loose structure, while the additions of pentanol isomers made the soot agglomerates more compact and delayed the growth of graphitic structures. The pentanol isomer additions also contributed to a higher disorder of the crystallite arrangement in the soot nanostructure. According to the TGA experiments, the results showed that the addition of pentanol isomers enhanced the oxidation reactivity of soot particles, which could help to reduce soot particle emissions.
Highlights
Soot particles formed in a combustion process are important for their contribution to increase heat transfer and combustion efficiency, their industrial applications as pigments and tire additives, and their capacity to clog flow passages, etc. [1]
The particles observed in F2–F4 were considered as nascent soot particles which appeared to contain particles observed in F2–F4 were considered as nascent soot particles which appeared to contain precursor-like material and and were justjust beginning precursor-like material were beginningto to carbonize
The present study focused on investigating the nanostructure and oxidation reactivity of nascent soot particles in pentanol-doped inverse diffusion flames
Summary
Soot particles formed in a combustion process are important for their contribution to increase heat transfer and combustion efficiency, their industrial applications as pigments and tire additives, and their capacity to clog flow passages, etc. [1]. Soot particles formed in a combustion process are important for their contribution to increase heat transfer and combustion efficiency, their industrial applications as pigments and tire additives, and their capacity to clog flow passages, etc. It can be known that the complete combustion products of hydrocarbon fuels are water and carbon dioxide. In addition to water and carbon dioxide, the combustion products contain carbon monoxide, unburnt fuel and soot particles, which are the byproducts of complex physical and chemical processes [1,4,5,6]. Accurate measurements of concentration and temperature fields are helpful to the study of soot formation characteristics. Huang et al [7] carried out an intensive study on the reconstruction model of the concentration and temperature field of soot in an asymmetric diffusion flame. Liu et al [8,9] used a Energies 2017, 10, 122; doi:10.3390/en10010122 www.mdpi.com/journal/energies
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
