ADSORPTION OF ASPHALTENE FUNTIONALITIES AND ASPHALTENE ON GOETHTTE
作者:
YoungW. Jeon,
SugH. Yi,
SangJ. Choi,
期刊:
Fuel Science and Technology International
(Taylor Available online 1995)
卷期:
Volume 13,
issue 2
页码: 195-214
ISSN:0884-3759
年代: 1995
DOI:10.1080/08843759508947673
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
Solid-stabilized water-in-oil emulsions cause many problems such as oil loss, fouling of a processing unit, and environmental hazard in the petroleum production and refining. The ability of finely divided solids to stabilize these emulsions is due to the adsorption of asphaltenes and other heavy constituents. This study presents the individual and competitive adsorption of asphaltene functionalities in cyclohexane solution and asphaltene in heptol solution onto goethite (FeOOH) particle surfaces at 25 °C to quantitatively understand the FeOOH particle-fluid interactions. The functionalities used were carboxylic acid (represented by benzoic acid), sulfoxide (by diphenylsulfoxide), and pyrrolic (by indole). The single component adsorption of these functionalities was well represented by both the Langmuir and Freundlich models, showing that adsorptive affinity for FeOOH increased in the order of indole < diphenylsulfoxide < benzoic acid. This observation was supported by the results of bi-component competitive adsorption of three functionality pairs on FeOOH, which were interpreted by the Fritz model. The adsorption of asphaltene was performed using dry and moist FeOOH surfaces and well represented by both the Langmuir and Freundlich models. The moist FeOOH yielded a decrease in the adsorption of asphaltene compared to adsorption on dry FeOOH.
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