Destabilization of bitumen-coated fine solids in oil through water-assisted flocculation using biomolecules extracted from guar beans  

作　　者：Camila Santander Jing Liu Xiaoli Tan Qi Liu Hongbo Zeng 

机构地区：[1]Department of Chemical and Materials Engineering,University of Alberta,Edmonton,AB T6G 1H9,Canada

出　　处：《Petroleum Science》2020年第6期1726-1736,共11页石油科学（英文版）

基　　金：the financial support from Institute for Oil Sands Innovation(IOSI),Imperial Oil,the Natural Sciences and Engineering Research Council of Canada(NSERC)and Alberta Innovates to the research work;the financial support from the Canada Foundation for Innovation(CFI),the Future Energy Systems underthe Canada First Research Excellence Fund and the Canada Research Chairs Program。

摘　　要：Non-aqueous extraction(NAE)of bitumen from oil sands has been gaining great attention from both the industry and academia as an alternative to the water-based extraction.A fine solids removal step is important for a NAE process in order to obtain high-quality bitumen product,which,however,remains a great challenge to reduce the fine solids content to the desired level.Here,we introduce a strategy of destabilizing the bitumen-coated silica particles in toluene with the addition of water and biomolecules extracted from Cyamopsiste tragonolobuosr L.Taup.,i.e.,high molecular weight guar gum(HGG)and low molecular weight guar gum(LGG),respectively.By virtue of sedimentation tests and focused beam reflectance measurement analysis,we demonstrate that the introduced water droplets modified with these biomolecules can facilitate the settling of the solid particles in toluene although the underlying mechanisms differ between these two biomolecule cases.Specifically,in the case of LGG,the added water droplets with the interfacial amphiphilic LGG can strengthen the attachment of solid particles from bulk toluene to the LGG surface.This research work provides useful insight into the development of effective approaches for destabilization and removal of bitumen-coated fine solids from NAE bitumen.

关 键 词：Non-aqueous extraction Guar gum Fine solids Aggregates Solid content Chord length 

分 类 号：TE626.86[石油与天然气工程—油气加工工程]