Effect of calcination temperature on the structure and formaldehyde removal performance at room temperature of Cr/MnO2 catalysts

Duan, Chaomin; Meng, Ming; Huang, Huang; Hua, Ding; Zhang, Qi; Lin, Zhihao; Huang, Siyu; Chen, Chaoshu; He, Minyan

doi:10.1007/s11164-022-04713-w

Cited by 7 publications

(1 citation statement)

References 60 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As shown in the insert of Figure 5a, the pore size distributions of MnO x -S and MnO x -S-A are mainly concentrated around 17 and 13 nm, and the different pore size distributions lead to different motions and flatness of the hysteresis loops. 37 In Figure 5b, MnO 2 -KL has a type IV adsorption−desorption curve and a H3 hysteresis loop, 38 while MnO 2 -HS has a typical type II curve, 39 which indicates that they have mesoporous and macroporous structures, respectively. As shown in Table 1, the specific surface area and pore volume of four samples were determined by BET.…”

Section: Resultsmentioning

confidence: 99%

Formaldehyde Adsorption and Degradation at Room Temperature Boosted by Increasing the Specific Surface Area and Surface-Active Oxygen Content of Manganese Oxides

He,

Chen,

Deng

et al. 2024

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

Preparation of manganese oxides with both excellent adsorption and catalytic activity for formaldehyde (HCHO) removal at room temperature remains challenging. In this work, the reaction between sodium thiosulfate and potassium permanganate was used to obtain MnO x -S with a mesoporous structure, which was subsequently treated with sulfuric acid to obtain MnO x -S-A. With MnO x -S-A, under static test conditions, approximately 1 ppm (volume concentration) of HCHO was completely removed from a 216 L closed vessel in 1.25 h, and 100% removal was still achieved in 2.5 h after 5 cycles. In the dynamic test condition of 150 L/(g cat h), MnO x -S-A consistently removed more than 95% of formaldehyde in 9 h. The excellent activity and stability of MnO x -S-A at room temperature can be attributed to its abundance of surface-active oxygen and its high specific surface area (273 m 2 /g). This work provides new ideas to further improve the adsorption and catalytic activity of manganese oxides.

show abstract

Section: Resultsmentioning

confidence: 99%