Gas composition in laser pyrolysis of hydrocarbon-based mixtures: Influence on soot morphology

Morjan, I.; Voicu, I.; Alexandrescu, R.; Pasuk, Iuliana; Sandu, I.; Dumitrache, Florian; Soare, I.; Fleaca, T.C.; Ploscaru, M.; Ciupină, V.; Daniels, H.; Westwood, Aidan; Rand, B.

doi:10.1016/j.carbon.2004.01.020

Cited by 31 publications

(8 citation statements)

References 12 publications

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“…According to Morjan et al (2004), the addition of oxygen in fuel during pyrolysis causes a greater presence of curved layers inside the primary particles. The influence of fringe length and tortuosity on particle oxidation reactivity has been explained in Vander Wal and Tomasek (2004).…”

Section: Discussionmentioning

confidence: 99%

Investigation on Particulate Oxidation from a DI Diesel Engine Fueled with Three Fuels

Tian

Cheung

Huang

2012

Aerosol Science and Technology

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In this study, particles generated from a direct-injection (DI) diesel engine fueled with biodiesel, ultra-low-sulfur diesel (ULSD, <10 ppm-wt), and low-sulfur diesel (LSD, <500 ppm-wt) were investigated experimentally for their oxidation properties, using the thermogravimetric analysis (TGA), at five engine loads. Kinetic analysis of particulate oxidation was conducted based on the mass loss curves obtained from the TGA. The activation energy was found to be in the range of 142-175, 76-127, and 133-162 kJ/mol for the particulate samples for ULSD, biodiesel, and LSD, respectively. The particulate oxidation rate decreases with the increase of engine load for each fuel, and at each engine load, the oxidation rate decreases in the order of biodiesel, LSD, and ULSD. The primary particle size, nanostructure, and volatile fraction were also investigated for different particulate samples. The results indicate that the higher oxidation rate of biodiesel particles could be related to the smaller primary particle size, the more disordered nanostructure, and the larger volatile fraction, compared with the ULSD and LSD particles. The increase of sulfur content in a diesel fuel has a limited influence on primary particle size and nanostructure, while inducing a larger volatile fraction, which might be one of the reasons for the stronger oxidative reactivity of the LSD particles, compared with the ULSD particles.

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Section: Discussionmentioning

confidence: 99%

Investigation on Particulate Oxidation from a DI Diesel Engine Fueled with Three Fuels

Tian

Cheung

Huang

2012

Aerosol Science and Technology

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“…The cw CO 2 laser-induced process allows formation of amorphous carbon and spherical diamond particles [6], graphitic carbon nanopowders with turbostratic structure [7] aromatic, hydrogenated, turbostratic and concentric carbon nanoparticles [8,9], shell-shaped carbon nanoparticles [10], carbon clusters and soot particles [11], nanosized graphene-containing carbon grains [12] and different nanostructures contained in soot (amorphous carbon, carbon with graphenes and fullerene-like features) [13]. The pulsed CO 2 laser radiation yields graphene layercontaining carbon nanoparticles with optical properties more affected by the nature of hydrocarbon than by laser power [12,14].…”

Section: Introductionmentioning

confidence: 99%

IR laser-induced metal ablation and dielectric breakdown in benzene

Santos

Díaz

Camacho

et al. 2010

Infrared Physics & Technology

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“…This finding suggests a new approach to constructing covalent network structures. In particular, the matching helical chain configuration offers a new strategy for solving structures of yet unidentified carbon phases seen in recent experiments, including carbon blacks, soot, or similar materials 20 21 22 23 24 25 26 27 28 29 30 .…”

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confidence: 99%

A New Carbon Allotrope with Six-Fold Helical Chains in all-sp2 Bonding Networks

Wang

Chen

Wang

et al. 2014

Sci Rep

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Using a recently developed approach to constructing covalent network structures from linear carbyne, we identify by ab initio calculations a new carbon allotrope in () symmetry that comprises six-fold helical chains with alternating sp2-type single and double bonds along the chains that are connected via zigzag benzene rings. This 6-fold carbene is characterized as a three-dimensional three-connected chiral crystalline modification of graphite. Phonon and electronic band calculations indicate that this new structure is dynamically stable and is a semiconductor with a band gap of 0.47 eV, in contrast to the semimetallic nature of graphite. Simulated x-ray diffraction patterns of the 6-fold carbene provide an excellent match to the previously unexplained distinct diffraction peak of a new carbon allotrope found in recent detonation experiments. These results establish a new carbon phase and offer insights into its outstanding structural and electronic properties.

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Gas composition in laser pyrolysis of hydrocarbon-based mixtures: Influence on soot morphology

Cited by 31 publications

References 12 publications

Investigation on Particulate Oxidation from a DI Diesel Engine Fueled with Three Fuels

Investigation on Particulate Oxidation from a DI Diesel Engine Fueled with Three Fuels

IR laser-induced metal ablation and dielectric breakdown in benzene

A New Carbon Allotrope with Six-Fold Helical Chains in all-sp2 Bonding Networks

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