ISSN 0862-5468 (Print), ISSN 1804-5847 (online) 

Ceramics-Silikáty 68, (3) (2024)


PREPARATION OF Al₂O₃ POROUS CERAMICS FROM THE SACRIFICIAL BIOMASS TEMPLATE METHOD
 
Du Danfeng, Sun Chaowei, Guo Xiurong, Hao Zewei, Qiao Lulu, Liu Zexin
 
College of Mechanical and Electrical Engineering, Northeast Forestry University, Harbin 150040, China

Keywords: Pore structure, Ceramic engineering, Porosity, Microstructure
 

Filter materials with structural stability and high-temperature resistance are urgently needed in the field of industrial exhaust gas filtration. Here, an Al₂O₃ porous ceramic with a biomass porous structure and thermal stability (above 1500 °C) was developed using a cost-effective and a readily available feedstock sacrificial biomass template method and subsequent calcination. Al₂O₃ porous ceramics from the sacrificial biomass template method exhibit better filtration capacity for air than general porous alumina ceramics; this can be attributed to the porous structure of Al₂O₃-PCBT, which increases the contact area and the number of contact points between the PM particles and the pores. In addition, the Al₂O₃-PCBT filter cartridge specimens showed high filtration efficiencies (up to 95.20%) and a low-pressure drop (down to 400 Pa) for the ultrafine CaCO₃ particles at an air velocity of 4.5-10 m.s-1. We envision that the Al₂O₃-PCBT filter will provide a solution for the removal of the particulate matter from industrial high-temperature exhaust gases.


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doi: 10.13168/cs.2024.0040
 
 
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