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December 8, 2011
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BGBU
The Structure for Novel Crystallite Carbon
Some Questions
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Building from Granular Basic Units (BGBU)
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The precursor of the novel crystallite carbon
BBU of mesophase pitchMesophase molecule
Pitch molecules
Thermal polycondensation Stacking
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Novel Crystallite
Carbon
carbonization activation
Yellow dot —the light components
in the matrix
Three-dimensional
structure
Basic units
?
Growing trend
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Stabilization of the mesophase pitch
Coal-tar pitch
Precursor
Delayed coking The product
contains many macropores
Coal-tar pitch
Precursor
Oxidation in the air
oxygen atom will be brought in
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Experiments
Coal-tar pitch
Mesophase pitchFig.1 Reaction equipment.
1 、 3. Thermocouples 2. Pressure gauge 4 、 6. Valve 5. Heating furnace 7. Reaction vessesl 8. Stirring paddle
Temperatureand time
ControllingThermal
condensation
Fig.2 the flowchat of the experiments
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Results
Sample
SP /℃
Solubility/wt%
H/CRecovery/wt%
MesophaseTI QI
CTP 27 9.06 0.17 0.05 -- --
CTP-360-6 136 24.22 0.68 -- 58.10 few
CTP-410-0.5 144 31.64 0.90 -- 58.85 few
CTP: coal-tar pitch CTP-360-6: heat treatment at 360℃ for 6 hours CTP-410-0.5: heat treatment at 410℃ for 30min SP: softening point TI: toluene insolubles QI: quinoline insolubles
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questions
1.How to control the conditions of the preparation for the proper precursors?
2.Some others appropriate methods for the stabilization of the mesophase pitch?