Novel low pressure drop and easy regeneration ceramic whisker membrane for submicron particulate matter filtration

Aiming to efficiently remove submicron particulate matter (PM), a low pressure drop ceramic whisker membrane was prepared via precursor solution dip coating followed by high temperature firing. Aluminum nitrate 9-Hydrate and boric acid were used as the precursors for the formation of aluminum borate...

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Bibliographic Details
Published in:Journal of the European Ceramic Society 2023-07, Vol.43 (8), p.3849-3853
Main Authors: Li, Yanjun, Cao, Weidi, Zhao, Lianfeng, Liu, Donghua, Chen, Jin, Zhang, Shaowei, Ding, Donghai, Xiao, Guoqing
Format: Article
Language:English
Subjects:
Back blow
Ceramic membranes
Filtration
Submicron PM
Whisker
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Summary:Aiming to efficiently remove submicron particulate matter (PM), a low pressure drop ceramic whisker membrane was prepared via precursor solution dip coating followed by high temperature firing. Aluminum nitrate 9-Hydrate and boric acid were used as the precursors for the formation of aluminum borate. A highly porous film comprising interconnected single phase 9Al2O3·2B2O3 whiskers of high aspect ratio, was successfully formed on an alumina support. Flue gas filtration tests indicated that as-fabricated ceramic whisker membrane exhibited outstanding filtration performance. More than 95 % PM in 0.3–1 µm was removed by using the as-prepared ceramic whisker membrane, and the pressure drop after three rounds of back blow regeneration remained stably at approximate only 1.3 times of the air pressure drop. This work provided a feasible approach to the preparation of a novel ceramic membrane with low pressure drop, and a novel strategy for high efficiency removal of submicron PM.
ISSN:0955-2219
1873-619X
DOI:10.1016/j.jeurceramsoc.2023.02.042