Browsing NTNU Open by Author "Gao, Bicheng"
Now showing items 1-4 of 4
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Asphaltene fractionation based on adsorption onto calcium carbonate: Part 1. Characterization of sub-fractions and QCM-D measurements
Subramanian, Sreedhar; Simon, Sebastien Charles; Gao, Bicheng; Sjøblom, Johan (Journal article; Peer reviewed, 2016)A new fractionation procedure was developed based on adsorption of asphaltenes onto calcium carbonate. The fractions obtained were characterized by elemental analysis, Fourier Transform Infrared Spectroscopy (FTIR) and ... -
Demulsification of crude oil emulsions tracked by pulsed field gradient NMR. Part II: Influence of chemical demulsifiers in external AC electric field
Hjartnes, Tomas; Mhatre, Sameer; Gao, Bicheng; Sørland, Geir; Simon, Sebastien Charles; Sjøblom, Johan (Journal article; Peer reviewed, 2020)Crude oil emulsions can reach stability levels that pose severe challenges for the processing industry. Certain conventional methods are used to deal with these challenges, such as chemical demulsification. In this article, ... -
Influence of Asphaltenes on Gelation of Tetrameric Acid with Calcium Ion at the Oil/Water Interface under Flow-Model Condition
Simon, Sebastien Charles; Gao, Bicheng; Tofte, Sondre; Sjøblom, Johan; Passade-Boupat, Nicolas; Palermo, Thierry; Rondon-Gonzalez, Marianna (Peer reviewed; Journal article, 2020)The first step in calcium naphthenate deposition is supposed to be the formation of an interfacial gel by cross-linking between ARN tetrameric acid and Ca2+. Several aspects of the inhibition of the interfacial gel formation ... -
Rheological Properties of Gels Formed at the Oil−Water Interface by the Reaction between Tetrameric Acid and Calcium Ion under Flow Conditions and at the Batch Scale
Simon, Sebastien Charles; Blanco, Estefania; Gao, Bicheng; Sjøblom, Johan; Passade-Boupat, Nicolas; Palermo, Thierry; Rondon-Gonzalez, Marianna (Journal article; Peer reviewed, 2019)The interfacial reaction between ARN tetrameric acid and Ca2+, which leads to the formation of calcium naphthenate deposits, was studied using a coaxial capillary device fitted to a profile analysis tensiometer. This device ...