EFFECTS OF MODIFICATION AND CALCINATION CONDITIONS ON THE ADSORPTION PERFORMANCE OF RED MUD FOR LOW-CONCENTRATION FORMALDEHYDE IN AIR

Zeng Xiaolan, Cao Yanrong, Zhou Juntao, Sun Yifei, Zhu Tianle
2013 Environment Protection Engineering   unpublished
The effects of modification and calcination conditions on the performance of red mud (RM) to absorb low-concentration formaldehyde in air were investigated using a fixed-bed flow reactor. The results show that the adsorption of RM for formaldehyde increases upon decreasing calcination temperature , with the optimum calcination temperature of 300 °C. H 2 O 2 modification can improve the adsorption performance, with the optimum modification concentration at 20 wt. %. Pore structure analysis
more » ... ted that low-temperature calcination improves the formation of micropores (0.9 nm to 2.7 nm), and maximizes the specific surface area and total pore volume thereby facilitating formalde-hyde adsorption.
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