December 8, 2011

BGBU

The Structure for Novel Crystallite Carbon

Some Questions

Building from Granular Basic Units (BGBU)

The precursor of the novel crystallite carbon

BBU of mesophase pitchMesophase molecule

Pitch molecules

Thermal polycondensation Stacking

Novel Crystallite

Carbon

carbonization activation

Yellow dot —the light components

in the matrix

Three-dimensional

structure

Basic units

?

Growing trend

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

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

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

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?