Spatially resolved micron-scale wrinkle structures at asphaltene films induced by mild thermal treatment and its impact on emulsion stability  

作　　者：Qiang Chen Hui-Jie Yang He Liu Yi Liu Dong-Feng Zhao 

机构地区：[1]State Key Laboratory of Heavy Oil Processing,College of Chemical Engineering,China University of Petroleum(East China),Qingdao,Shandong 266580,China [2]Department of Energy Conservation and Cleaner Production,Qingdao OASIS Environmental&Safety Technology Co.Ltd,Qingdao,Shandong 266555,China

出　　处：《Petroleum Science》2022年第6期3107-3115,共9页石油科学（英文版）

基　　金：supported by National Natural Science Foundation of China(52004266);the Opening Fund of State Key Laboratory of Heavy Oil Processing(SKLOP202001001);the Key R&D Program of Shandong,China(2019JZZY020502);independent innovation project of China University of Petroleum(21CX06008A)

摘　　要：Mild thermal treatment is an important partial upgrading technique to enable bitumen pipeline transportation,but no attention has been paid to the impact of mild thermal treatment on the emulsification behavior of emerging partially upgraded bitumen.Asphaltene compounds are active emulsion stabilizers in bitumen oil.The emulsion stabilizing capacity of bitumen asphaltenes was investigated,before and after a mild thermal treatment at 400℃.The structural morphology and mechanical property of the asphaltene interfacial films were analyzed by using a combination of cryo-SEM,Langmuir trough,and Brewster angle microscopy.The thermal treatment significantly enhanced the emulsion stabilizing capacity of bitumen asphaltenes;the interfacial films formed by the thermally treated asphaltene samples appeared to be rougher and thicker with more abundant micron-scale wrinkle structures.The interfacial corrugation may intensify the mechanical stability/flexibility of the asphaltene films and consequently strengthen the stability of emulsion droplet.

关 键 词：ASPHALTENES Interfacial film Emulsion stabilizing capacity Mild thermal treatment 

分 类 号：TE626.86[石油与天然气工程—油气加工工程]