微晶炭前驱体中间相沥青的制备要点.pptVIP

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 pitch Mesophase 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 pitch Fig.1 Reaction equipment. 1、3. Thermocouples 2. Pressure gauge 4、6. Valve 5. Heating furnace 7. Reaction vessesl 8. Stirring paddle Temperature and time Controlling Thermal condensation Fig.2 the flowchat of the experiments Results Sample SP /℃ Solubility/wt% H/C Recovery/wt% Mesophase TI 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 How to control the conditions of the preparation for the proper precursors？ Some others appropriate methods for the stabilization of the mesophase pitch? * * In this mechanism , we consider that the isotropic matrixes of pitches are modified with the formation of ploycondensed aromatic hydrocarbons called mesophase molecule, due to thermal decomposition and thermal polymerization reactions, followed by the orientation of the mesophase molecule in a preferred direction forming the secondary structure that we called BBU of mesophase. The accumulation or stacking of these oriented BBU give