US EPA

7446976 

Journal Article 

Novel design of alumina foams with three-dimensional reticular architecture for effective high-temperature particulate matter capture 

Liu, J; Ren, Bo; Chen, Y; Lu, Y; Zhang, S; Rong, Y; Yang, J 

2019 

Yes 

Journal of the American Ceramic Society
ISSN: 0002-7820 

Blackwell Publishing Inc. 

102 

9 

5576-5586 

English 

10.1111/jace.16416 

WOS:000479010400055 

Ceramic foams with extensive interconnected pores have great application potential in high-temperature particulate matter (PM) capture. Considering that there are still challenges to synthesize ceramic foams with efficient filtration, a novel hierarchical-structured alumina foam with three-dimensional (3D) reticular architecture has been fabricated via combining chemical grafting pore-forming agent and polyurethane (PU) foaming technology. Carbon black is grafted with carbamate functional groups in order to enable a better dispersion in highly viscous PU. Submicrometer and micrometer-sized pores on the cell walls are observed in hierarchical-structured ceramic foams. The resulting alumina foam exhibits 95.2% removal efficiency for PM particles and low pressure drop of only 50 Pa when grafted carbon black content is 3 wt%. This filtration performance is much higher than that of existing ceramic materials. These features, combined with our experimental design strategy, provide a new insight to design high-temperature PM filtration materials with durable high performance. © 2019 The American Ceramic Society 

3D reticular architecture; alumina foam; grafted carbon black; pressure drop; removal efficiency