Asphaltene fractionation based on adsorption onto calcium carbonate: Part 2. Self-association and aggregation properties

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• 作者：Sreedhar Subramanian^a ; ^{sreedhar.subramanian@ntnu.no} ; Geir Humborstad Sø ; rland^b ; Sé ; bastien Simon^a ; Zhenghe Xu^c ; Johan Sjö ; blom^a
• 关键词：Asphaltene fractionation ; Isothermal Titration Calorimetry (ITC) ; DOSY NMR ; NIR ; FTIR
• 刊名：Colloids and Surfaces A: Physicochemical and Engineering Aspects
• 出版年：2017
• 出版时间：5 February 2017
• 年：2017
• 卷：514
• 期：Complete
• 页码：79-90
• 全文大小：2106 K
• 卷排序：514

文摘

Comparison of properties between asphaltene fractions obtained by 2 different fractionation procedures. Some of the asphaltene sub-fractions exhibit different properties than the unfractionated asphaltenes. Polar asphaltene fractions exhibited low flocculation onset and high bulk adsorption tendencies. The first precipitating asphaltene sub-fraction exhibits higher aggregation heat (ΔHasp) than the other sub-fractions.