Analysis of co-carbonization and coking process of medium and low temperature to high-temperature coal pitch
The medium and low temperature coal tar pitch and the mixed asphalt with 25%high-temperature coal tar pitch were used as raw materials.Firstly,the difference of chemical structure between the two raw materials was compared.Secondly,the difference of com-ponent content and microstructure between the two raw materials in the process of thermal conversion was explored.Finally,the reaction activity of the two systems in the process of thermal conversion was evaluated from the perspective of kinetic analysis.The results show that the introduction of high-temperature coal tar pitch in the raw material increases the content of short side chain aromatic compounds in the system,thus neutralizing the activity of oxygen atoms in the early stage of carbonization reaction,reducing the steric hindrance of molecular interpenetration in the process of intermediate phase melting and merging,making the reaction in the thermal conversion process of the system more mild,and the intermediate phase balls generated in the early stage of thermal conversion are less and larger.In the later stage of thermal conversion,the balls are further melted and developed,and the final formed intermediate phase pitch has good orientation,small interlayer spacing,and is easier to graphitize.
NETL
NSTL
万方数据
