On the Response of Nascent Soot Nanostructure and Oxidative Reactivity to Photoflash Exposure

Soot particles are a kind of major pollutant from fuel combustion. To enrich the understanding of soot, this work focuses on investigating detailed influences of instantaneous external irradiation (conventional photoflash exposure) on nanostructure as well as oxidation reactivity of nascent soot particles. By detailed soot characterizations flash can reduce the mass of soot and soot nanostructure can be reconstructed substantially without burning. After flash, the degree of soot crystallization increases while the soot reactive rate decreases and the activation energy increases. In addition, nanostructure and oxidative reactivity of soot in air and Ar after flash are different due to their different thermal conductivities.

[1]  Dongmei Chen,et al.  Measurement of Soot Volume Fraction and Temperature for Oxygen-Enriched Ethylene Combustion Based on Flame Image Processing , 2017 .

[2]  Linda G. Blevins,et al.  The existence of young soot in the exhaust of inverse diffusion flames , 2002 .

[3]  N. Tai,et al.  Variations in the microstructure and electrical resistance of the SWCNT films under consecutive photoflash exposures , 2010 .

[4]  Mejdi Jeguirim,et al.  Diesel soot oxidation by nitrogen dioxide, oxygen and water under engine exhaust conditions: Kinetics data related to the reaction mechanism☆ , 2014 .

[5]  María U. Alzueta,et al.  Oxidation of Acetylene Soot: Influence of Oxygen Concentration , 2007 .

[6]  Carlo Alberto Rinaldini,et al.  Combustion Analysis of a Diesel Engine Running on Different Biodiesel Blends , 2015 .

[7]  Feiyu Kang,et al.  Materials Science and Engineering of Carbon: Fundamentals , 2014 .

[8]  Dong Liu,et al.  Nanostructure and Oxidation Reactivity of Nascent Soot Particles in Ethylene/Pentanol Flames , 2017 .

[9]  Dong Liu,et al.  Effects of butanol isomers additions on soot nanostructure and reactivity in normal and inverse ethylene diffusion flames , 2017 .

[10]  Eric G. Eddings,et al.  Chemical and morphological characterization of soot and soot precursors generated in an inverse diffusion flame with aromatic and aliphatic fuels , 2010 .

[11]  Suk Ho Chung,et al.  Structural effects on the oxidation of soot particles by O2: Experimental and theoretical study , 2013 .

[12]  Randy L. Vander Wal,et al.  Soot Nanostructure: Definition, Quantification and Implications , 2005 .

[13]  Qing Nian Chan,et al.  External irradiation effect on the growth and evolution of in-flame soot species , 2016 .

[14]  André L. Boehman,et al.  Studies of soot oxidative reactivity using a diffusion flame burner , 2012 .

[15]  F. Mondragón,et al.  Chemical characterization of soot precursors and soot particles produced in hexane and diesel surrogates using an inverse diffusion flame burner , 2013 .

[16]  Soo Hyung Kim,et al.  Flash-ignitable nanoenergetic materials with tunable underwater explosion reactivity: The role of sea urchin-like carbon nanotubes , 2015 .

[17]  Seung Hyun Yoon,et al.  Effects of High EGR Rate on Dimethyl Ether (DME) Combustion and Pollutant Emission Characteristics in a Direct Injection Diesel Engine , 2013 .

[18]  Qing Nian Chan,et al.  The influence on the soot distribution within a laminar flame of radiation at fluxes of relevance to concentrated solar radiation , 2011 .

[19]  R. Bilbao,et al.  Acetylene soot reaction with NO in the presence of CO. , 2009, Journal of hazardous materials.

[20]  Randy L. Vander Wal,et al.  Development of an HRTEM image analysis method to quantify carbon nanostructure , 2011 .

[21]  V. Ramanathan,et al.  Global and regional climate changes due to black carbon , 2008 .

[22]  Rodolfo Cruz-Silva,et al.  Flash reduction and patterning of graphite oxide and its polymer composite. , 2009, Journal of the American Chemical Society.

[23]  Ji-Beom Yoo,et al.  Formation of Shell‐Shaped Carbon Nanoparticles Above a Critical Laser Power in Irradiated Acetylene , 2004 .

[24]  Evangelos G. Giakoumis,et al.  Investigation of a Diesel-Engined Vehicle’s Performance and Emissions during the WLTC Driving Cycle—Comparison with the NEDC , 2017 .

[25]  Randy L. Vander Wal,et al.  A comparison of soot nanostructure obtained using two high resolution transmission electron microscopy image analysis algorithms , 2011 .

[26]  M. Bergin,et al.  Soot Takes Center Stage , 2002, Science.

[27]  Randy L. Vander Wal,et al.  HRTEM study of diesel soot collected from diesel particulate filters , 2007 .

[28]  Zheng Wang,et al.  Photo-responsive behaviors and structural evolution of carbon-nanotube-supported energetic materials under a photoflash , 2012 .

[29]  Xiaolin Zheng,et al.  Flash ignition of Al nanoparticles: Mechanism and applications , 2011 .

[30]  Maohong Fan,et al.  Use of Nanoporous FeOOH as a Catalytic Support for NaHCO3 Decomposition Aimed at Reduction of Energy Requirement of Na2CO3/NaHCO3 Based CO2 Separation Technology , 2011 .

[31]  P. Ajayan,et al.  Nanotubes in a flash--ignition and reconstruction. , 2002, Science.

[32]  Andrea D'Anna,et al.  Exploring Soot Particle Concentration and Emissivity by Transient Thermocouples Measurements in Laminar Partially Premixed Coflow Flames , 2017 .