کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
639626 | 1456194 | 2006 | 9 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Mass transfer mechanisms and transport resistances in direct contact membrane distillation process Mass transfer mechanisms and transport resistances in direct contact membrane distillation process](/preview/png/639626.png)
The objective of the present work was to investigate the mass transport and fouling mechanism of direct contact membrane distillation (DCMD) process. The experiments were performed on a flat sheet module using pure water and humic acid solution as feeds. The membrane employed was hydrophobic PVDF of pore size 0.22 μm.The mass transfer models based on Dusty gas model were applied to fit the flux data and the pressure blocking filtration laws were employed to explain the membrane fouling. The results showed that molecular diffusion was the most suitable model for predicting fluxes of both laminar and turbulent flow. Fouling of the membrane by humic acid aggregates can be described by cake filtration model. The transport resistance of the feed boundary layer was higher than other resistances, and fouling resistance increased significantly with time.
Journal: Journal of Membrane Science - Volume 277, Issues 1–2, 1 June 2006, Pages 186–194