Browsing NTNU Open by Author "Xu, Zhenghe"
Now showing items 1-7 of 7
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Asphaltene fractionation based on adsorption onto calcium carbonate: Part 2. Self-association and aggregation properties
Subramanian, Sreedhar; Sørland, Geir Humborstad; Simon, Sebastien Charles Roger; Xu, Zhenghe; Sjöblom, Johan (Journal article; Peer reviewed, 2017)The self-association and aggregation properties of asphaltene sub-fractions obtained by adsorption onto CaCO3 (doi:http://dx.doi.org/10.1016/j.colsurfa.2016.02.011) were investigated using a combination of near infrared ... -
Demulsifier assisted film thinning and coalescence in crude oil emulsions under DC electric fields
Mhatre, Sameer; Simon, Sebastien Charles; Sjøblom, Johan; Xu, Zhenghe (Journal article, 2018)Electrocoalescence has been considered a most efficient method of crude oil dewatering; however, just electric fields are not enough when dealing with heavy crude oils. In this workwe studied effect of asphaltene flocculation ... -
Interactions of Polyaromatic Compounds. Part 1: Nanoaggregation Probed by Electrospray Ionization Mass Spectrometry and Molecular Dynamics Simulation
Liu, Lan; Zhang, Rongya; Wang, Xi; Simon, Sebastien Charles; Sjøblom, Johan; Xu, Zhenghe; Jiang, Bin (Journal article; Peer reviewed, 2017)Nanoaggregation of three synthetic polyaromatic compounds, N-(1-hexylhepyl)-N′-(5-carboxylicpentyl)-perylene-3,4,9,10-tetracarboxylicbisimide (C5Pe), N-(1-undecyldodecyl)-N′-(5-carboxylicpentyl)-perylene-3,4,9,10-tetraca ... -
Interactions of Polyaromatic Compounds. Part 2. Flocculation Probed by Dynamic Light Scattering and Molecular Dynamics Simulation
Wang, Xi; Zhang, Rongya; Liu, Lan; Qiao, Peiqi; Simon, Sebastien Charles; Sjøblom, Johan; Xu, Zhenghe; Jiang, Bin (Journal article; Peer reviewed, 2017)In part 1 of this series of papers, the results of electron spray ionization mass spectrometry (ESI-MS) and molecular dynamics (MD) simulation revealed a close relationship between nanoaggregation of polyaromatic (PA) ... -
Interfacial properties pertinent to W/O and O/W emulsion systems prepared using polyaromatic compounds
Niu, Zheng; Manica, Rogerio; Li, Zuoli; He, Xiao; Sjøblom, Johan; Xu, Zhenghe (Journal article; Peer reviewed, 2019)Establishing interfacial science to understand molecular mechanisms of stabilizing water in heavy crude oil (W/O) emulsions is challenging due to non-transparent nature of crude oil even in diluted systems, as most of the ... -
Model molecules mimicking asphaltenes
Sjøblom, Johan; Simon, Sebastien Charles; Xu, Zhenghe (Journal article; Peer reviewed, 2015)Asphalthenes are typically defined as the fraction of petroleum insoluble in n-alkanes (typically heptane, but also hexane or pentane) but soluble in toluene. This fraction causes problems of emulsion formation and ... -
Synergistic Adsorption of Polyaromatic Compounds on Silica Surfaces Studied by Molecular Dynamics Simulation
Xiong, Yong; Li, Zhen; Cao, Tiantian; Xu, Shengming; Yuan, Shiling; Sjøblom, Johan; Xu, Zhenghe (Journal article; Peer reviewed, 2018)Adsorption on silica surfaces of polyaromatic compounds, N-(1-hexylhepyl)-N′-(5-carboxylicpentyl)-perylene-3,4,9,10-tetracarboxylic bisimide (C5Pe) and N-(1-undecyldodecyl)-N′-(5-carboxylicpentyl)-perylene-3,4,9,10-tetracarboxylic ...