摘要
应用冷滤点测定仪分离在冷滤点温度下的模拟柴油、加剂模拟柴油、基础柴油及加剂柴油的液相和固相,用气相色谱法测定液、固两相中正构烷烃的组成,并通过分配因子 Z 计算得到在冷滤点温度下石蜡结晶量、石蜡的正构烷烃含量。结果表明,用该分离方法以及计算方法来研究柴油在冷滤点温度下液-固平衡态的结晶行为是可行的。
Crystallization of wax from diesel fuels and the interaction of pour point depressant wax were studied by solid-liquid equilibrium method. The solid phase and liquid phase of partially frozen diesel fuels were separated at the cold filter plugging point by isothermal filtration using a cold filter plugging point tester and were analyzed by gas chromatography. The amount and compositions of both phases were deduced from mass balance after correction by a distribution factor Z（the mass fraction of liquid in solid deposit）. Four kinds of fuels were used to test including model fuel, model fuel with depressant, base diesel fuel and diesel fuel with depressant,and their crystallization rate and the content of n paraffin in wax at cold filter plugging point were compared. Results showed that using said separation technique and calculation method to study the crystallization behavior of diesel fuels at cold filter plugging point was feasible.
出处
《石油炼制与化工》
CAS
CSCD
北大核心
2008年第9期25-30,共6页
Petroleum Processing and Petrochemicals
关键词
相平衡
结晶
柴油
phase equilibrium
crystallization
diesel fuel
