分离(统计)
石油工程
化学
化学工程
环境科学
地质学
计算机科学
工程类
机器学习
作者
Yu Huang,Lifeng Zhang,Ningning Zhan,Houkai Teng,Lishan Zhou,Jianmin Zhao,Wenjun Fang
标识
DOI:10.1016/j.petrol.2022.110403
摘要
A series of hyperbranched polyethyleneimine (h-PEI) functioned with terminal amine groups is synthesized to remove oil from O/W emulsion. The demulsifier dehydration rate of h-PEI is systematically evaluated with the subsidiary facilities of DLS analysis, digital tensiometer and UV–vis spectrophotometer. The results indicate that h-PEI demulsifier displays satisfactory demulsification (the oil removal rate>90%) with small dosage (<80 mg L −1 ) and short settling time (<30 min). The relatively short equilibrium time and great demulsification are ascribed to the amine groups and the molecular weight. On one hand, the hyperbranched macromolecules with amine groups can rapidly diffuse and adsorb to the oil-water interface, on the other hand, the molecules with adequate molecular weight are apt to flocculate, coalesce oil droplets, and then obtain high-efficient demulsification. The exceptional demulsification performance of h-PEI exhibits a potential role application in industrial water treatment or the petroleum demulsification industry. • A convenient synthetic process for h-PEI is developed. • Hyperbranched polymer h-PEI is an effective demulsifier for O/W emulsions of microdroplets with 90% of oil removal rate. • The combination of DLS observation and UV–vis analysis provides a new evidence to explore the demulsification mechanism.
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