1. College of Chemical Engineering, Beijing Institute of Petrochemical Technology, Beijing 102617, China
2. CNOOC Tianjin Chemical Research & Design Institute, Tianjin 300131, China
Industrial application needs mesocarbon microbeads (MCMB) with even particle size distribution and good sphericity, while the reaction conditions and raw material property may influence the MCMB property stated above. MCMB was prepared by thermal polymerization with coal tar pitch as the raw material, with the effects of reaction conditions i.e., the temperature, time and pressure, as well as raw material properties including the soft point and quinolone-insoluble (QI) on the particle size distribution and appearance of MCMB being investigated. The results show that within a certain range, the increase of the reaction temperature or reaction time during thermal polymerization helps the grow of MCMB, and the particle size distribution becomes more narrow with granularity becoming homogeneous. Too low pressure makes the light components of the reaction system escape and the system viscosity quickly increase, which is not conducive to gain the spherical appearance. Low soft points of raw materials and small viscosities of the reaction system are helpful for the free motion and fusion of the microbeads growing to MCMB with even particle sizes. The primary QI in the raw material is the core for the formation and growth of MCMB, and if the particle sizes of the primary QI are too different, the size of MCMB will become uneven with MCMB polarized. The MCMB with even particle sizes can be obtained by removing the QI with too large particle sizes in the raw material.
熊杰明, 陈潇, 孙国娟, 葛明兰, 黄海燕, 杨靖丰. 煤沥青原料性质和反应条件对中间相炭微球粒度分布和形貌的影响[J]. 清华大学学报（自然科学版）, 2014, 54(3): 314-319.
Jieming XIONG, Xiao CHEN, Guojuan SUN, Minglan GE, Haiyan HUANG, Jingfeng YANG. Effects of raw material property of coal tar pitch and reaction conditions on particle size distribution and appearance of mesocarbon microbeads. Journal of Tsinghua University(Science and Technology), 2014, 54(3): 314-319.
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2014, Vol. 54 
),陈潇1,孙国娟2,葛明兰1,黄海燕1,杨靖丰1
