Investigation of retention aid polymer degradation on a pilot scale flow loop, 2012 PaperCon Conference

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A pilot scale flow loop was used to investigate conditions for the onset of retention aid polymer degradation during dosage into the approach flow. A 1700 ppm cationic-polyacrylamide (cPAM) solution was dosed concentrically into a turbulent pipe flow consisting of either pure water or a 2 % softwood pulp suspension. Retention polymer degradation was characterized by changes in the percent turbulent drag reduction induced by the retention aid additives, which was determined by measurement of the pressure differential downstream the dosage point.