Encapsulated nano-heat-sinks for thermal management of heterogeneous chemical reactions
Abbreviated Journal Title
Nanoscale
Keywords
PHASE-CHANGE MATERIALS; PACKED-BED REACTOR; METHANOL OXIDATION; CATALYTIC REACTOR; BATCH REACTORS; RUNAWAY; TEMPERATURE; DECOMPOSITION; PARTICLES; TRANSPORT; Chemistry, Multidisciplinary; Nanoscience & Nanotechnology; Materials; Science, Multidisciplinary; Physics, Applied
Abstract
This paper describes a new way to control temperatures of heterogeneous exothermic reactions such as heterogeneous catalytic reaction and polymerization by using encapsulated nanoparticles of phase change materials as thermally functional additives. Silica-encapsulated indium nanoparticles and silica encapsulated paraffin nanoparticles are used to absorb heat released in catalytic reaction and to mitigate gel effect of polymerization, respectively. The local hot spots that are induced by non-homogenous catalyst packing, reactant concentration fluctuation, and abrupt change of polymerization rate lead to solid to liquid phase change of nanoparticle cores so as to avoid thermal runaway by converting energies from exothermic reactions to latent heat of fusion. By quenching local hot spots at initial stage, reaction rates do not rise significantly because the thermal energy produced in reaction is isothermally removed. Nanoparticles of phase change materials will open a new dimension for thermal management of exothermic reactions to quench local hot spots, prevent thermal runaway of reaction, and change product distribution.
Journal Title
Nanoscale
Volume
2
Issue/Number
12
Publication Date
1-1-2010
Document Type
Article
DOI Link
Language
English
First Page
2790
Last Page
2797
WOS Identifier
ISSN
2040-3364
Recommended Citation
"Encapsulated nano-heat-sinks for thermal management of heterogeneous chemical reactions" (2010). Faculty Bibliography 2010s. 1010.
https://stars.library.ucf.edu/facultybib2010/1010
Comments
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