Degradation of drag reducing polymers in aqueous solutions

The performance of drag reducing polymers in turbulent flow is restricted by their mechanical degradation. This study examines how the working fluid can affect the degradation behavior of diluted drag reducing polymeric solutions. Solutions having different proportions of tap water and de-ionized wa...

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Bibliographic Details
Published in:The Korean journal of chemical engineering 2018, 35(1), 214, pp.34-43
Main Authors: Karami, Hamid Reza, Rahimi, Masoud, Ovaysi, Saeed
Format: Article
Language:English
Subjects:
Biotechnology
Catalysis
Chemistry
Chemistry and Materials Science
Computational fluid dynamics
Degradation
Dilution
Drag
Drinking water
Fluid flow
Industrial Chemistry/Chemical Engineering
Materials Science
Mathematical analysis
Polyethylenes
Polymers
Pressure drop
Transport Phenomena
Turbulence
Turbulent flow
Working fluids
Xanthan
화학공학
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Summary:The performance of drag reducing polymers in turbulent flow is restricted by their mechanical degradation. This study examines how the working fluid can affect the degradation behavior of diluted drag reducing polymeric solutions. Solutions having different proportions of tap water and de-ionized water served as the working fluids. Three commercially available water soluble polymeric agents, namely, an anionic copolymer of polyacrylamide, xanthan gum, and polyethylene oxide, were then added to these solutions. All experiments had identical flow rates corresponding to turbulent conditions in a laboratory scale pipe line. Variation of pressure drop in the pipe line was then measured for 2 hours. It was found that polymer degradation is accelerated in tap water solutions compared to that in de-ionized water solutions. However, this is dependent on the specification of the polymer used, namely, the molecular weight of the polymer and the rigidity of its molecular backbone. Furthermore, a new mathematical relation has been developed to investigate degradation of the polymers over time.
ISSN:0256-1115
1975-7220
DOI:10.1007/s11814-017-0264-1