Adsorption of Asphaltenes on Metals
作者： Hussein Alboudwarej , David Pole , William Y. Svrcek , Harvey W. Yarranton
DOI: 10.1021/IE048948F
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摘要: The adsorption of Athabasca and Cold Lake C7-asphaltenes on stainless steel (304L), iron, aluminum powders was measured using UV−vis spectrophotometry. effects resins, temperature, n-heptane-to-toluene ratio were also investigated. In all cases, Langmuir (type I) isotherms observed, indicating that asphaltenes saturated the available surface area for adsorption. saturation adsorptions metals (0.25−2.7 mg/m2) same order magnitude as minerals. less than monolayer coverage observed water-in-hydrocarbon emulsion interfaces, there are a limited number sites metals. Higher molar resins low mass asphaltenes, suggesting by morphology metal surface. general, higher when self-associated to greater ex...
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