Surface Tension Estimates for Droplet Formation in Slurries with Low Concentrations of Hydrophobic Particles, Polymer Flocculants or Surface-Active Contaminants

Gauglitz, Phillip A. ; Mahoney, Lenna A. ; Blanchard, Jeremy ; Bamberger, Judith A.

Pacific Northwest National Laboratory (U.S.)

关键词: Surface Tension;    Polymers;    36 Materials Science;    Water;    Slurries;   

DOI  :  10.2172/1024544
RP-ID  :  PNNL-20466
RP-ID  :  AC05-76RL01830
RP-ID  :  1024544

美国|英语

来源: UNT Digital Library

【 摘 要 】

In support of the K-Basin project, Pacific Northwest National Laboratory (PNNL) was requested to evaluate the appropriate surface tension value to use in models predicting the formation of droplets from spray leaks of K-Basin slurries. The specific issue was whether it was more appropriate to use the surface tension of pure water in model predictions for all plausible spray leaks or to use a lower value. The surface tension of K-Basin slurries is potentially affected not only by particles but by low concentrations of nonionic polyacrylamide flocculant and perhaps by contaminants with surfactant properties, which could decrease the surface tension below that of water. A lower surface tension value typically results in smaller droplets being formed with a larger fraction of droplets in the respirable size range, so using the higher surface tension value of pure water is not conservative and thus needs a strong technical basis.