2026-09-19T13:53:26Zhttps://dspace.mit.edu/server/oai/requestoai:dspace.mit.edu:1721.1/1057162022-01-13T07:54:05Zcom_1721.1_7582com_1721.1_7581col_1721.1_131024
John H. Lienhard, V.
Bolaji, John O. (John Olaoluwa)
Massachusetts Institute of Technology. Department of Mechanical Engineering.
Massachusetts Institute of Technology. Department of Mechanical Engineering
2016-12-05T19:59:13Z
2016-12-05T19:59:13Z
2016
2016
http://hdl.handle.net/1721.1/105716
964669577
Thesis: S.B., Massachusetts Institute of Technology, Department of Mechanical Engineering, 2016.
Cataloged from PDF version of thesis.
Includes bibliographical references (pages 35).
An experimental study was done to explore the effect of feed water temperature on the properties and performance of nanofiltration membranes. The NF270 membrane was selected for this study, in which two temperatures of feed solution were passed through the membrane and water flux and salt rejection were measured. Results from fitting with experimental data show that water flux increased 23% and salt rejection changed minimally from 25°C to 40°C. A numerical fitting method used the experimental data to determine the parameters of the membrane: pore radius, effective active layer thickness, and volumetric charge density. From 25°C to 40°C, the fitted parameters showed a 29% increase in pore size, and an 84% increase in effective active layer thickness; volumetric charge density increased in magnitude by approximately 64%. Pre-compaction and pre-soaking the membrane in alcohol are two separate membrane pretreatment procedures that showed significant effects on the performance of the membrane.
by John O. Bolaji.
S.B.
41 pages
eng
Massachusetts Institute of Technology
M.I.T. theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. See provided URL for inquiries about permission.
http://dspace.mit.edu/handle/1721.1/7582
Mechanical Engineering.
Effect of feed temperature on the performance and properties of the NF270 membrane
Thesis
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<Abstract>An experimental study was done to explore the effect of feed water temperature on the properties and performance of nanofiltration membranes. The NF270 membrane was selected for this study, in which two temperatures of feed solution were passed through the membrane and water flux and salt rejection were measured. Results from fitting with experimental data show that water flux increased 23% and salt rejection changed minimally from 25°C to 40°C. A numerical fitting method used the experimental data to determine the parameters of the membrane: pore radius, effective active layer thickness, and volumetric charge density. From 25°C to 40°C, the fitted parameters showed a 29% increase in pore size, and an 84% increase in effective active layer thickness; volumetric charge density increased in magnitude by approximately 64%. Pre-compaction and pre-soaking the membrane in alcohol are two separate membrane pretreatment procedures that showed significant effects on the performance of the membrane.</Abstract>
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