Flow-Induced Microstructure in Aqueous Cationic Surfactant Solution in the Presence of Structure-Enhancing Additives.

2001 ◽  
Vol 34 (2) ◽  
pp. 227-231 ◽  
Author(s):  
WON-JONG KIM ◽  
SEUNG-MAN YANG
Keyword(s):  
Cationic Surfactant ◽  
Surfactant Solution

Surfactant Effects on Picloram Adsorption by Soils

Weed Science ◽  
1976 ◽  
Vol 24 (6) ◽  
pp. 549-552 ◽  
Author(s):  
J. D. Gaynor ◽  
V. V. Volk
Keyword(s):  
Organic Matter ◽  
Cationic Surfactant ◽  
Anionic Surfactant ◽  
Organic Matter Content ◽  
Clay Content ◽  
Surfactant Solution ◽  
Matter Content ◽  
Adsorption Sites ◽  
Surfactant Solutions ◽  
Extractable Al

The effects of soil organic matter, clay, extractable Al, cation exchange capacity, and pH on the adsorption of picloram (4-amino-3,5,6-trichloropicolinic acid) from aqueous and surfactant solutions were investigated. Linear adsorption isotherms for the soils were obtained with the Freundlich equation. Of the five soil properties investigated, Freundlich K values correlated with extractable Al and clay content. Picloram adsorption from aqueous solutions and from the non-ionic and anionic surfactant solutions was greater on the soils at pH 5 than at pH 7. The anionic surfactant competed with picloram for adsorption sites on the soils at pH 5. Picloram adsorption from solutions containing 0.1 and 1% cationic surfactant was greater than that from aqeuous and anionic and nonionic surfactant solutions. Picloram adsorption from the 10% cationic surfactant solution was similar on soils with pH 5 and 7 and increased with decreased organic matter content.

scholarly journals Adsorption Mechanism of a Cationic Surfactant on Textiles in Excess Anionic Surfactant Solution

1987 ◽  
Vol 36 (1) ◽  
pp. 38-41
Author(s):  
Osamu OKUMURA ◽  
Hirofumi KANAO ◽  
Shigeru YANABA ◽  
Kentaro KIYAMA
Keyword(s):  
Cationic Surfactant ◽  
Anionic Surfactant ◽  
Adsorption Mechanism ◽  
Surfactant Solution

The flow of a dilute cationic surfactant solution past a circular cylinder

2001 ◽  
Vol 30 (4) ◽  
pp. 410-417 ◽  
Author(s):  
C. Bergins ◽  
M. Nowak ◽  
M. Urban
Keyword(s):  
Circular Cylinder ◽  
Cationic Surfactant ◽  
Surfactant Solution

Adsorption of a Switchable Cationic Surfactant on Natural Carbonate Minerals

SPE Journal ◽  
2014 ◽  
Vol 20 (01) ◽  
pp. 70-78 ◽  
Author(s):  
Leyu Cui ◽  
Kun Ma ◽  
Ahmed A. Abdala ◽  
Lucas J. Lu ◽  
Ivan Tanakov ◽  
...  
Keyword(s):  
High Pressure ◽  
Nonionic Surfactant ◽  
Cationic Surfactant ◽  
Divalent Cations ◽  
Surfactant Solution ◽  
Mobility Control ◽  
Carbonate Formation ◽  
Surfactant Precipitation ◽  
High Pressure Co2 ◽  
Carbon Dioxide Co2

Summary A switchable cationic surfactant (e.g., tertiary amine surfactant Ethomeen C12) was previously described as a surfactant that one can inject in high-pressure carbon dioxide (CO2) for foam-mobility control. C12 can dissolve in high-pressure CO2 as a nonionic surfactant and equilibrate with brine as a cationic surfactant. Here, we describe the adsorption characteristics of this surfactant in carbonate-formation materials. The adsorption of this surfactant is sensitive to the equilibrium pH, the electrolyte composition of the brine, and the minerals in carbonate-formation materials. Pure C12 is a nonionic surfactant. When it is mixed with brine, the solution has a high pH and limited solubility. However, when the surfactant solution in brine is equilibrated with high-pressure CO2, the pH is approximately 4; the surfactant switches to a cationic surfactant and becomes soluble. Thus, the adsorption is also a function of pH. The adsorption of C12 on calcite at low pH is low (e.g., 0.5 mg/m2). However, if the carbonate formation contains silica or clays, the adsorption is high, as is typical for cationic surfactants. The adsorption of C12 on silica decreases with an increase in divalent (Ca2+ and Mg2+) and trivalent (Al3+) cations. This is because of the competition for the negatively charged silica sites between the multivalent cations and the monovalent cationic surfactant. An additional effect of the presence of divalent cations in the brine is that it reduces the dissolution of calcite or dolomite in the presence of high-pressure CO2. The dissolution of calcite and dolomite is harmful because of formation damage and increased alkalinity. The latter raises the pH and thus increases the adsorption of C12 or even causes surfactant precipitation.

Abrupt Reduction in Drag Reducing Ability of Cationic Surfactant Solution

2004 ◽  
Vol 37 (11) ◽  
pp. 1326-1336 ◽  
Author(s):  
Chongyoup Kim ◽  
Seong Ryong Park ◽  
Hyung-Kee Yoon ◽  
Jung Rim Haw
Keyword(s):  
Cationic Surfactant ◽  
Surfactant Solution ◽  
Reducing Ability
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