摘要
利用红外光谱法(IR)、差示扫描量热法(DSC)和动态光散射法(DLS)初步探讨了马来酸酐-醋酸乙烯酯-高碳胺三元共聚物降凝剂(MV-a)对柴油的降滤机理。柴油中加入MV-a降凝剂后,其红外光谱特征吸收峰面积比A1363/A1377、A722/A733增大,表明蜡晶结构发生了明显的变化,MV-a分子与柴油蜡晶分子发生共晶作用是MV-a降凝剂降滤的主要机理;加MV-a降凝剂后柴油DSC曲线的峰面积和斜率减小明显;MV-a降凝剂分散在柴油中的粒径小于1000nm,易形成胶体分散体系,降滤效果较明显。
The mechanism of maleic anhydride-vinyl acetate-higher amine terpolymer （MV-a） as the pour point depressant for diesel oil was explored preliminarily by using infrared spectrometry（IR）,differential scanning calorimeter（DSC） and dynamic light scattering（DLS） methods.The IR adsorption peak area ratios of A1363/A1377 and A722/A733 were increased remarkably for the wax sample separated from diesel oil with MV-a added,compared with that of wax sample without MV-a,showing that the structure of wax crystal was varied obviously.The co-crystallization of wax crystal and MV-a molecules might be the mechanism of cold filter plugging point reduction for diesel oil.If the peak areas and slopes of DSC curves reduced obviously for the diesel oil with MV-a added compared with that without MV-a,it will be better for the cold filter plugging point reduction of diesel oil.The colloidal dispersion was formed when the grain diameter of MV-a in diesel oil was less than 1000 nm,and the cold filter plugging point depression was better,too.
出处
《石油学报（石油加工）》
EI
CAS
CSCD
北大核心
2010年第3期414-418,共5页
Acta Petrolei Sinica(Petroleum Processing Section)
基金
中国石油大学重质油国家重点实验室横向课题项目(200310)资助
关键词
降凝剂
共晶作用
冷滤点
蜡晶
机理
pour point depressant
co-crystallization
cold filter plugging point
wax crystal
mechanism
