کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4989486 1456930 2018 30 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Transition from depth to surface filtration for a low-skin effect filter subject to continuous loading of nano-aerosols
ترجمه فارسی عنوان
انتقال از عمق تا فیلتراسیون سطح برای یک فیلتر اثر کم پوست تحت بارگذاری مداوم نانو آیرزل ها
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی تصفیه و جداسازی
چکیده انگلیسی
The pressure drop due to the skin effect, which is a combination of both pore filling in the skin region in the filter and the aerosol bridges, can be relatively low (i.e. low-skin effect) for low nanofiber packing density and a thin nanofiber filter. However, the establishment of the skin region during depth filtration and the aerosol bridging effect above the filter surface are still two essential processes prior to formation of the cake on the filter surface. Two experiments and related analysis on loading of thin nanofiber filters using nano-aerosols are used to investigate this scenario. It has been found that in the course of aerosol bridging, the pressure drop behaves predominantly concave upward with increasing specific aerosol deposit. This contrast with previous study with high-skin effect for a thick, less-porous nanofiber filter for which aerosol bridging predominantly yields a concave downward behavior with specific aerosol deposit during pressure drop excursion. Most importantly, the bridging model that predicts successfully the high-skin effect can also predict the low-skin effect where pressure drop has a concave upward behavior with increasing specific aerosol deposit. Finally, we have demonstrated the aerosol holding capacity for a thin, highly porous, nanofiber filter can still be significant, with a small fraction of the total aerosols captured by depth filtration in the filter, and majority of deposited aerosols above the filter in the surface filtration regime, partly in the aerosol bridges and mostly in the cake.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Separation and Purification Technology - Volume 190, 8 January 2018, Pages 202-210
نویسندگان
, ,