کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
636592 | 1456130 | 2010 | 8 صفحه PDF | دانلود رایگان |
The performance of organic solvent nanofiltration membranes was studied in a pilot plant apparatus using a spiral-wound (STARMEM™ 1221) membrane element over extended periods, with 0–20 wt% solutions of tetraoctylammonium bromide (TOABr) in toluene. It was found that membrane transport parameters determined from flat-sheet membrane tests can be used to accurately predict spiral-wound element performance. A simple model considering uniform pressure/concentration conditions on permeate and retentate sides of the membrane element described experimental flux and rejection trends well for the system studied. The simple model gave similar results to a more complex model that allowed for spatial velocity, concentration and pressure gradients. However, when using a number of elements in series the simple model postulate of uniform conditions will be less accurate, and a complex model which includes spatial gradients, or a simple model that uses an average pressure obtained from experimental pressure drop values, will be required to give accurate predictions.
Journal: Journal of Membrane Science - Volume 349, Issues 1–2, 1 March 2010, Pages 167–174