CeO-MnO 催化剂等离子体后催化去除二甲基硫及反应机理分析。
Removal of dimethyl sulfide by post-plasma catalysis over CeO-MnO catalysts and reaction mechanism analysis.
机构信息
Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education, China), Dalian University of Technology, Dalian, 116024, China; School of Environmental Science and Technology, Dalian University of Technology, Dalian, 116024, China.
Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education, China), Dalian University of Technology, Dalian, 116024, China; School of Electrical Engineering, Dalian University of Technology, Dalian, 116024, China; School of Environmental Science and Technology, Dalian University of Technology, Dalian, 116024, China.
出版信息
Chemosphere. 2021 Jul;274:129910. doi: 10.1016/j.chemosphere.2021.129910. Epub 2021 Feb 15.
The combination of a multistage rod plasma reactor and post CeO-MnO catalysts is studied to treat dimethyl sulfide (DMS). The physicochemical properties of all catalysts and the effect of the catalytic performance of CeO-MnO catalysts on DMS removal efficiency are studied. Placing CeO-MnO catalysts after the non-thermal plasma system can improve the capability of DMS degradation. The results exhibit that CeO-MnO (1:1) catalyst presents a higher catalytic activity than that of CeO, MnO, CeO-MnO (1:0.5) and CeO-MnO (1:3). At the power of 21.7 W, the combination of dielectric barrier discharge and CeO-MnO (1:1) catalyst could improve the DMS removal efficiency and CO selectivity by 16.2% and 18.2%, respectively. This result maybe closely related with its specific surface area, redox properties and oxygen mobility. In addition, the degradation mechanism of DMS over CeO-MnO catalysts is proposed. Finally, the stability of the CeO-MnO (1:1) catalyst is investigated, and the reason for the decreased activity of the used catalyst is analyzed.
采用多级棒状等离子体反应器与 CeO-MnO 后催化剂组合处理二甲基硫醚（DMS）。研究了所有催化剂的物理化学性质以及 CeO-MnO 催化剂对 DMS 去除效率的催化性能的影响。将 CeO-MnO 催化剂置于非热等离子体系统后，可以提高 DMS 的降解能力。结果表明，CeO-MnO（1:1）催化剂比 CeO、MnO、CeO-MnO（1:0.5）和 CeO-MnO（1:3）具有更高的催化活性。在功率为 21.7 W 时，介电阻挡放电与 CeO-MnO（1:1）催化剂的组合可以将 DMS 的去除效率和 CO 选择性分别提高 16.2%和 18.2%。这一结果可能与其比表面积、氧化还原性能和氧迁移率密切相关。此外，还提出了 CeO-MnO 催化剂上 DMS 的降解机理。最后，考察了 CeO-MnO（1:1）催化剂的稳定性，并分析了失活催化剂活性降低的原因。
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