Vacuum membrane distillation of liquid desiccants Utilizing Hollow Fiber Membranes
Name:
1-s2.0-S1383586617330083-main.pdf
Size:
1.124Mb
Format:
PDF
Description:
Accepted Manuscript
Name:
1-s2.0-S1383586617330083-fx1.jpg
Size:
19.96Kb
Format:
JPEG image
Description:
Graphical abstract
Type
ArticleAuthors
Lefers, Ryan
Srivatsa Bettahalli, N.M.
Fedoroff, Nina V.

Nunes, Suzana Pereira

Leiknes, TorOve

KAUST Department
Advanced Membranes and Porous Materials Research CenterBiological and Environmental Science and Engineering (BESE) Division
Bioscience Program
Center for Desert Agriculture
Emeritus Distinguished Professor of Biosciences, KAUST, Thuwal, 23955-6900, Saudi Arabia
Environmental Science and Engineering Program
Nanostructured Polymeric Membrane Lab
Physical Science and Engineering (PSE) Division
Water Desalination and Reuse Research Center (WDRC)
Date
2018-01-31Online Publication Date
2018-01-31Print Publication Date
2018-06Permanent link to this record
http://hdl.handle.net/10754/627020
Metadata
Show full item recordAbstract
This paper documents the testing of a vacuum membrane distillation system intended for use with liquid desiccants. Liquid desiccants offer the possibility for low-energy, ambient temperature dehumidification. Effective desalination and purification of diluted desiccants outputs two important products: a concentrated desiccant for reuse in dehumidification and fresh water. In this study, vacuum membrane distillation was used in the laboratory to purify diluted liquid desiccants. Calcium chloride and magnesium chloride were the desiccants selected for testing. Desiccant solutions were pumped through the lumens of poly(vinylidene fluoride) (PVDF) hollow fiber membranes at varying feed inlet temperatures, solution velocity rates and vacuum set points during membrane distillation. An average flux of 8 kg m-2 h-1 was obtained using 30 wt% magnesium chloride solution at a temperature of 50 °C while applying vacuum to achieve 25 mbar absolute pressure on the air side of the membrane. The results are promising for the development of a full-scale vacuum membrane distillation process for desiccant solution regeneration and fresh water recovery. In addition, the recovered condensate was of sufficient quality for use in agricultural irrigation or drinking water.Citation
Lefers R, Srivatsa Bettahalli NM, Fedoroff N, Nunes SP, Leiknes T (2018) Vacuum membrane distillation of liquid desiccants Utilizing Hollow Fiber Membranes. Separation and Purification Technology. Available: http://dx.doi.org/10.1016/j.seppur.2018.01.042.Sponsors
The research reported in this publication was sponsored by King Abdullah University of Science and Technology (KAUST). The authors thank colleagues from the Nanostructured Polymeric Membrane (NPM) group, as well as the Water Desalination and Reuse Center (WDRC), and KAUST’s Core Labs for their help on equipment and analysis.Publisher
Elsevier BVAdditional Links
http://www.sciencedirect.com/science/article/pii/S1383586617330083ae974a485f413a2113503eed53cd6c53
10.1016/j.seppur.2018.01.042