Abstract View
High-temperature Resistant Nanofiber and Its Filtration Application
QISHENG OU, David Y. H. Pui, University of Minnesota
Abstract Number: 307
Working Group: Control and Mitigation Technology
Abstract
Nanofiber materials has wide application in both air and liquid filtrations. A thin layer of nano-scaled fibers can significantly enhance filtration efficiency of a base filter media, especially for submicron contaminants. The slip flow around nanofibers helps to reduce flow resistance and filtration efficiency, leading to improved filter quality factor (Figure of Merit). Most current available nanofiber materials are polymer based, which limits their application at high temperature environments. In this study, a generation method of producing high-temperature resistant nanofibers will be presented. The produced short fibers have diameters in a few hundred nanometers and can sustain temperature at 1000 oC or higher. These nanofibers were first deposited onto several conventional air filtration substrates, and examples will be given in terms of the enhancement of filtration performance. The preliminary results show not only improved filtration efficiency and quality factor at submicron size at clean stage, but also extended filter lifetime under contaminant loading scenarios. Demonstrations will then be given in modifying conventional hot gas filtration media with these nanofibers, including both metallic fiber media (in super-micron size) and ceramic powder-based membranes. Their filtration performance will be evaluated with laboratory-generated soot particles as a surrogate to mimic engine emission application, as an example of the potential applications of this novel nanofiber materials. Detailed results and discussion will be given in the presentation.