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Studying bitumen-bubble interactions using atomic force microscopy

文献类型：期刊论文

作者Ren SL(任嗣利)2; Masliyah, Jacob1; Xu, Zhenghe1
刊名Colloids and Surfaces A: Physicochemical and Engineering Aspects
出版日期2014
卷号444页码:165-172
关键词Oil sands Bitumen Bubble Wettability AFM
ISSN号0927-7757
通讯作者Xu, Zhenghe
英文摘要Processing of oil sands using water-based extraction processes requires selective aeration of liberated bitumen droplets to facilitate transport of aerated bitumen to the top of the slurry where it is recovered. Colloidal forces between bubble and bitumen or silica control the selective attachment of bitumen to air bubbles as desired. In this study, interaction forces between bubble and bitumen or silica were measured in various aqueous solutions using atomic force microscopy (AFM). The wettability of the silica particles was found to play a significant role in controlling bubble–silica interactions. There exists a long-range repulsive force and zero adhesion between air bubbles and hydrophilic silica spheres, in contrast to strong attractive force and large adhesion force between the air bubble and hydrophobic silica spheres. The results suggest the potential of unwanted aeration of hydrophobic solids, leading to a poor froth quality. Study on bitumen–bubble interaction shows that the types of surfactants have a great effect on the long-range interaction due to their adsorption on the bubble surface, which could cause the bubble surface either positively or negatively charged, leading to different electrostatic forces. In the plant process water or in the anionic surfactant solution, the bitumen-coated silica sphere could penetrate into the bubble to form a three-phase contact (TPC) line when the external loading force exceeds a threshold value.
学科主题物理化学与绿色催化
收录类别SCI
资助信息the NSERC Industrial Research Chair in Oil Sands Engineering; the National Natural Science Foundation of China (Grant No. 51374195);the “100 Talents Program” by the Chinese Academy of Science (CAS)
语种英语
WOS记录号WOS:000333000800023
源URL[http://210.77.64.217/handle/362003/19236]  
专题兰州化学物理研究所_OSSO国家重点实验室
作者单位1.Univ Alberta, Dept Chem & Mat Engn, Edmonton, AB T6G 2G6, Canada
2.Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Oxo Synth & Select Oxidat, Lanzhou 730000, Peoples R China
推荐引用方式
GB/T 7714		 Ren SL,Masliyah, Jacob,Xu, Zhenghe. Studying bitumen-bubble interactions using atomic force microscopy[J]. Colloids and Surfaces A: Physicochemical and Engineering Aspects,2014,444:165-172.
APA Ren SL,Masliyah, Jacob,&Xu, Zhenghe.(2014).Studying bitumen-bubble interactions using atomic force microscopy.Colloids and Surfaces A: Physicochemical and Engineering Aspects,444,165-172.
MLA Ren SL,et al."Studying bitumen-bubble interactions using atomic force microscopy".Colloids and Surfaces A: Physicochemical and Engineering Aspects 444(2014):165-172.

入库方式： OAI收割

来源：兰州化学物理研究所

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