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Highly Efficient Oxidation of N, N-Dimethylformamide at Low Temperature over a Mn-based Catalyst by Optimization Support
Chemical Engineering Journal ( IF 13.3 ) Pub Date : 2024-12-20 , DOI: 10.1016/j.cej.2024.158752 Dongsheng Ye, Min Ding, Meixingzi Gao, Mingqi Li, Yu Wang, Lai Jin, Wangcheng Zhan, Li Wang, Yun Guo, Qiguang Dai, Yanglong Guo, Aiyong Wang
Chemical Engineering Journal ( IF 13.3 ) Pub Date : 2024-12-20 , DOI: 10.1016/j.cej.2024.158752 Dongsheng Ye, Min Ding, Meixingzi Gao, Mingqi Li, Yu Wang, Lai Jin, Wangcheng Zhan, Li Wang, Yun Guo, Qiguang Dai, Yanglong Guo, Aiyong Wang
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The evaluation of catalytic oxidation of nitrogenous volatile organic compounds (NVOCs) relies on two key indicators: activity and N2 selectivity. In this work, three different supports (SiO2, ZSM-5 and Al2O3) loading with Mn or Mn-Ce were synthesized by deposition-precipitation for catalytic combustion of N, N-Dimethylformamide (DMF). Mn-Ce/ZSM-5 catalyst displayed the best performance for DMF oxidation, achieving 100% DMF conversion and CO2 selectivity at 240 °C as well as 90% N2 selectivity at 400 °C. It also exhibits excellent water resistance and high stability. All the characterization results indicated that the state of Mn species was positively correlated with catalytic activity. The addition of Ce species weakened the inhibitory interaction between Mn species and Al species, resulting in an elevation in the state of Mn species which was highest of the six catalysts, thus increasing activity. Meanwhile, the rise in surface oxygen species resulted in high CO2 selectivity and rapid oxidation of NH3. Furthermore, Bronsted acid sites on ZSM-5 facilitated NH3-SCR progress, achieving a high N2 selectivity at high temperatures.
更新日期：2024-12-20
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