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Synthesis of titanium carbide nanoparticles by wire explosion process and its application in carbon dioxide adsorption
Sreetama Ghosh, Prem Ranjan, Aneesh Saravana Kumaar, ,
Published in Elsevier Ltd
2019
Volume: 794
   
Pages: 645 - 653
Abstract
Titanium carbide (TiC) nanoparticles have been synthesized by exploding titanium wire in methane as well as diluted acetylene atmosphere at different gas pressures. The synthesized samples have been annealed to enhance the level of carburization and to reduce the amount of excess amorphous carbon present on the surface of the as-synthesized nanoparticles. The crystallinity, surface morphology and surface area of the produced nanocarbide samples have been probed by various characterization techniques. The size of the carbide nanoparticles was measured using lognormal distribution derived from transmission electron microscopy analysis. An increase in the applied energy shows a significant reduction in particle size irrespective of the operating pressure. Further, TiC nanoparticles have been utilized to study the CO2 adsorption properties at different temperatures and in low pressure (≤1 bar). The synthesized nanoparticles may not show very high adsorption capacities, but significant enhancement in adsorption has been observed when compared to bulk TiC. The isosteric heat of adsorption was determined from the variation of pressure with temperature at a constant excess gas uptake. The standard enthalpy change (ΔH) observed during adsorption manifests that the adsorption process in TiC is exothermic and within the range of physisorption such that the gas can be regenerated easily from the material utilizing minimum energy. © 2019 Elsevier B.V.
About the journal
JournalData powered by TypesetJournal of Alloys and Compounds
PublisherData powered by TypesetElsevier Ltd
ISSN09258388
Open AccessNo
Concepts (24)
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    Amorphous carbon
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    Carbon dioxide
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    Crystallinity
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    EXPLODING WIRES
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    Gas adsorption
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    High resolution transmission electron microscopy
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    Metal nanoparticles
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    Morphology
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    Nanoparticles
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    Particle size
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    Particle size analysis
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    Physisorption
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    Surface morphology
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    TITANIUM CARBIDE
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    Vaporization
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    CARBON DIOXIDE ADSORPTION
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    Characterization techniques
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    CO2 CAPTURE
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    HIGH ADSORPTION CAPACITY
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    ISOSTERIC HEAT OF ADSORPTION
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    METAL CARBIDES
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    TITANIUM CARBIDES (TIC)
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    WIRE EXPLOSION
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    Synthesis (chemical)