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Separation and Purification Technology

Separation and Purification Technology

IF: 8.09
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Deep catalytic combustion of N, N-dimethylformamide over titania nanotube-supporting transition metal oxides catalysts

Published:6 December 2024 DOI: 10.1016/j.seppur.2024.130976
Yatao Yang, Xiaoxiao Ding, Zequan Zeng, Weihong Jiao, Yifan Li, Yaqin Hou, Zhanggen Huang

Abstract

TiO2-based catalysts are extensively employed in flue gas pollution control processes, including volatile organic compounds (VOCs) oxidation and selective catalytic reduction (SCR). Nonetheless, there persists challenges related to the lack of a clear mechanistic understanding and high N2 selectivity for the selective oxidation of nitrogen-containing volatile organic compounds (NVOCs). Herein, titania nanotube-supporting transition metals oxides catalysts were prepared to degrade N, N-dimethylformamide (DMF). The results manifested that the interaction between metal and support (M?O?Ti) could enhance oxygen vacancy (Ov), hence promote the DMF decomposition. CuTi catalyst with high Ov content exhibited the highest activity and N2 selectivity for DMF decomposition. In situ diffuse reflectance infrared fourier transform spectroscopy (DRIFTs) and density functional theory (DFT) calculation also proved that CuTi catalyst facilitated the degradation of DMF into dimethylamine (DMA). Moreover, the MnTi catalyst with higher content of lattice oxygen was advantageous in facilitating the complete degradation of DMF into CO2, which enhanced CO2 selectivity. This study could provide theoretical guidance for the practical industrial degradation of NVOCs using TiO2-based catalysts.

Substances (4)

Materials
Procduct Name CAS Molecular Formula Supplier Price
Sodium hydroxide 1310-73-2 NaOH 1356 suppliers $14.00-$17490.00
N,N-Dimethylformamide 68-12-2 C3H7NO 1311 suppliers $11.20-$12200.00
Titanium dioxide 13463-67-7 O2Ti 768 suppliers $9.00-$12090.00
Cupric nitrate trihydrate 10031-43-3 CuH3NO4 245 suppliers $10.00-$5070.00

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