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Direct Contact Membrane Distillation (DCMD): Experimental Study on the Commercial PTFE Membrane and Modelling

Hwang, Ho Jung and He, Ke and Gray, Stephen R and Zhang, Jianhua and Moon, Il Shik (2011) Direct Contact Membrane Distillation (DCMD): Experimental Study on the Commercial PTFE Membrane and Modelling. Journal of Membrane Science, 371 (1-2). pp. 90-98. ISSN 0376-7388

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Abstract

Membrane distillation (MD) is an alternative technology for the separation of mixtures through porous hydrophobic membranes. A commercially available PTFE (polytetrafluoroethylene) membrane was used in direct contact membrane distillation (DCMD) to investigate the effect of module dimensions on performance. Membrane properties, such as liquid entry pressure (LEP), contact angle (CA), pore diameter, effective porosity and pore size distribution, were characterized and used in analysis. A two dimensional (2D) model containing mass, energy, and momentum balance was developed for predicting permeate flux production. Different flow modes including co-current and counter-current flow mode were studied. The effect of linear velocity on permeation flux for both wide and short, and long and narrow module designs was investigated. The mass transfer coefficients for each condition were calculated for comparison of the module designs. The effects of operating parameters such as flow mode, temperature difference, and NaCl concentration were also considered. The simulated results were validated by comparing with experimental results. Good agreement was found between the numerical simulation and the experiments.

Item Type: Article
Uncontrolled Keywords: ResPubID23286, direct contact membrane distillation, module geometry, heat and mass transfer, vapor pressure difference
Subjects: Faculty/School/Research Centre/Department > Institute for Sustainability and Innovation (ISI)
FOR Classification > 0904 Chemical Engineering
SEO Classification > 9004 Water and Waste Services
Depositing User: VUIR
Date Deposited: 31 Jul 2012 01:35
Last Modified: 14 Jan 2015 03:32
URI: http://vuir.vu.edu.au/id/eprint/8997
DOI: 10.1016/j.memsci.2011.01.020
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Citations in Scopus: 29 - View on Scopus

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