scholarly journals Dispersibility of Colloidal Particles: Basic Theory about Zeta Potential Measurement

2019 ◽  
Vol 55 (7) ◽  
pp. 266-270
Author(s):  
Shinnosuke HASHIDA
Keyword(s):  
Zeta Potential ◽  
Colloidal Particles ◽  
Basic Theory ◽  
Potential Measurement ◽  
Zeta Potential Measurement

How to use alum with cationic dispersed rosin size

TAPPI Journal ◽  
2016 ◽  
Vol 15 (5) ◽  
pp. 331-335 ◽  
Author(s):  
LEBO XU ◽  
JEREMY MYERS ◽  
PETER HART
Keyword(s):  
Zeta Potential ◽  
Colloidal Particles ◽  
Streaming Potential ◽  
Excessive Amount ◽  
Paper Machine ◽  
Optimum Amount ◽  
Potential Measurement ◽  
Streaming Current ◽  
Wide Range ◽  
Laboratory Results

Retention of cationic dispersed rosin size was studied via turbidity measurements on stock filtrate with different alum and dispersed rosin size dosages. Stock charge characteristics were analyzed using both an analysis of charge demand determined via a streaming current detector and an evaluation of zeta potential of the fibers by streaming potential measurement. The results indicated that an optimum amount of alum existed such that good sizing retention was maintained throughout a wide range of dispersed rosin size dosages. However, when an excessive amount of alum was used and fines and colloidal particles were transitioned from anionic to cationic, the cationic size retention was reduced. Laboratory results were confirmed with a paper machine trial. All data suggested that a stock charge study was necessary to identify optimal alum dosage for a cationic dispersed rosin sizing program.

Screening Friction Reducer Performance Using Zeta Potential

2021 ◽  
Author(s):  
Philip Ayazi ◽  
Nathan Peregoy ◽  
Gabriel Monreal ◽  
Frank Zamora
Keyword(s):  
Zeta Potential ◽  
General Purpose ◽  
Polymer Chains ◽  
Source Water ◽  
Flow Loop ◽  
Screening Process ◽  
Potential Measurement ◽  
Zeta Potential Measurement ◽  
Industry Standard ◽  
Shale Reservoirs

Abstract Friction reducers (FRs) are essential additives for water used in hydraulic fracturing treatments for shale reservoirs. These polymers swell and unfurl in the frac water so that polymer chains align along the direction of flow to inhibit turbulence thereby reducing friction at high flow rates. Source water ion content, application pH, and compatibility with the formation are key drivers in deciding which FR chemistries are fit-for-purpose for the operation, balancing desired fluid performance with treatment economics. This investigation explores zeta potential measurement as a novel and meaningful analytical metric to correlate chemical and rheological properties of FRs in a range of source water qualities with their friction reducing performance. The approach of this investigation involves measuring zeta potential of frac fluids formulated using anionic or cationic FRs in waters with varying ionic activity over a range of FR concentrations and pH. The evaluation encompasses a variety of FRs spanning general purpose materials to more sophisticated additives designed to function in fluids with higher concentrations of salt. Dry FR materials as well as corresponding slurry or emulsion forms of the additives are tested. Monovalent and divalent salts and mixtures thereof are used in brine formulations. FR characterization is performed including rheological sweeps, viscoelasticity measurements, and flow loop tests. Results from this study support the conclusion that zeta potential measurement can be used during the FR screening process as a viable supplement to industry standard tests for assessing FR performance in brine.

Zeta Potential Measurement in Catalyst Preparations

2005 ◽  
Vol 28 (2) ◽  
pp. 182-186 ◽  
Author(s):  
J. B. Stelzer ◽  
R. Nitzsche ◽  
J. Caro
Keyword(s):  
Zeta Potential ◽  
Potential Measurement ◽  
Zeta Potential Measurement
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