Trapping and aerogelation of nanoparticles in negative gravity hydrocarbon flames

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Show simple item record Chakrabarty, Rajan K. Novosselov, Igor V. Beres, Nicholas D. Moosmüller, Hans Sorensen, Christopher M. Stipe, Christopher B. 2014-09-29T16:10:07Z 2014-09-29T16:10:07Z 2014-09-29
dc.description.abstract We report the experimental realization of continuous carbon aerogel production using a flame aerosol reactor by operating it in negative gravity (−g; up-side-down configuration). Buoyancy opposes the fuel and air flow forces in −g, which eliminates convectional outflow of nanoparticles from the flame and traps them in a distinctive non-tipping, flicker-free, cylindrical flame body, where they grow to millimeter-size aerogel particles and gravitationally fall out. Computational fluid dynamics simulations show that a closed-loop recirculation zone is set up in −g flames, which reduces the time to gel for nanoparticles by ≈10[superscript 6] s, compared to positive gravity (upward rising) flames. Our results open up new possibilities of one-step gas-phase synthesis of a wide variety of aerogels on an industrial scale. en_US
dc.language.iso en_US en_US
dc.relation.uri en_US
dc.rights Copyright 2014 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. en_US
dc.subject Carbon aerogel production en_US
dc.subject One-step gas-phase synthesis en_US
dc.subject Aerogels en_US
dc.title Trapping and aerogelation of nanoparticles in negative gravity hydrocarbon flames en_US
dc.type Article (publisher version) en_US 2014 en_US
dc.citation.doi doi:10.1063/1.4884057 en_US
dc.citation.epage 243103-4 en_US
dc.citation.issue 24 en_US
dc.citation.jtitle Applied Physics Letters en_US
dc.citation.spage 243103-1 en_US
dc.citation.volume 104 en_US
dc.contributor.authoreid sor en_US

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