Wettability Alteration of the Quartz Surface in the Presence of Metal Cations

2013 ◽  
Vol 27 (12) ◽  
pp. 7354-7359 ◽  
Author(s):  
Ziyuan Qi ◽  
Yefei Wang ◽  
Hong He ◽  
Dandan Li ◽  
Xiaoli Xu
Keyword(s):  
Metal Cations ◽  
Wettability Alteration ◽  
Quartz Surface

Study on Wettability Alteration of Quartz Surface by Surfactants

2014 ◽  
Vol 962-965 ◽  
pp. 539-543
Author(s):  
Zi Yuan Qi ◽  
Ye Fei Wang ◽  
Hai Yang Yu ◽  
Xiao Li Xu
Keyword(s):  
Nonionic Surfactants ◽  
Anionic Surfactants ◽  
Electrostatic Force ◽  
Dynamic Contact ◽  
Contact Angles ◽  
Wettability Alteration ◽  
Quartz Surface ◽  
Hydrophobic Force ◽  
Polar Components ◽  
Low Concentrations

In order to study the effect of surfactants on wettability of quartz surface, the dynamic contact angles of different surfactants on water-wet and oil-wet quartz surfaces were measured. The experimental results showed that the advancing contact angles of cationic surfactants, anionic surfactants and nonionic surfactants on oil-wet quartz surfaces decrease with the increase of surfactant concentrations; the wettability of water-wet quartz plates remains water-wet after treated by all three kinds of surfactants. Surfactants can reverse the wettability from oil-wet to water-wet at low concentrations; The electrostatic force, hydrophobic force and the attraction between surfactant and polar components of crude oil are the key interactions in the wettability alteration process.

Wettability Alteration of Quartz Surface by Low-Salinity Surfactant Nanofluids at High-Pressure and High-Temperature Conditions

2019 ◽  
Vol 33 (8) ◽  
pp. 7062-7068 ◽  
Author(s):  
Nilesh Kumar Jha ◽  
Muhammad Ali ◽  
Stefan Iglauer ◽  
Maxim Lebedev ◽  
Hamid Roshan ◽  
...  
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Wettability Alteration ◽  
Quartz Surface ◽  
Low Salinity ◽  
Temperature Conditions

Adsorption of metal cations on wool carbonising waste. Part 1. Adsorption isotherms

1981 ◽  
Vol 31 (1) ◽  
pp. 597-601 ◽  
Author(s):  
Karim Farag ◽  
Francis Perineau ◽  
Antoine Gaset ◽  
Jacques Molinier
Keyword(s):  
Adsorption Isotherms ◽  
Metal Cations

A Contribution to the Structure Characteristics and Phase Composition of Vanadium-Phosphorus Catalysts Prepared from the VOPO4.xH2O.yH3PO4 Precursor

1992 ◽  
Vol 57 (12) ◽  
pp. 2475-2480 ◽  
Author(s):  
Milan Brutovský ◽  
Štefan Gerej ◽  
Ján Novák ◽  
Lucia Ferdinandyová
Keyword(s):  
Heat Treatment ◽  
Phase Composition ◽  
Ir Spectra ◽  
Metal Cations ◽  
Preparation Procedure ◽  
Final Temperature ◽  
Structure Characteristics ◽  
Heat Treatment Regime ◽  
Condensed Phosphates ◽  
Defective Crystals

Catalysts were prepared from VOPO4.xH2O.yH3PO4 (x = 0.3-2, y = 0.2-0.85) by reduction with SO2 up to a final temperature of 750-800 °C, and activated in a reaction mixture of 1.0-1.4% butane in air up to 500 °C. The structure characteristics and phase composition of the catalysts were found to be affected by the preparation procedure and heat treatment regime. Their diffraction lines and IR spectra revealed that the catalysts from larger and less defective crystals than catalysts which were obtained from the VOHPO4.xH2O.yH3PO4 precursor and activated in the reaction mixture at temperatures up to 500 °C. In the catalysts prepared by the above procedure, the tendency to the formation of phases of higher-condensed phosphates, in particular VO(PO3)2 or even V(PO3)3, increases with increasing n(P):n(V) ratio and is then more pronounced than with vanadium-phosphorus catalysts prepared by other procedures. The tendency to the formation of the catalytically less active condensed phosphates is partly suppressed by the embedding of modifying metal cations (Fe or Cu in this case).

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