Experimental study of volatile organic compounds catalytic combustion on Cu‐Mn catalysts with different carriers

Abstract

Catalytic combustion is an effective way for volatile organic compounds harmless treatment. In this paper, the synergism between non-noble metal active phase Cu-Mn and Y-zeolite, SiO 2 , γ-Al 2 O 3 , and TiO 2 was studied by catalytic combustion experiments and corresponding characterizations; the conclusions as following: Cu-Mn/SiO 2 has the best activity and stability, T 10 and T 90 are 210 C and 298 C, respectively. Benzene can be completely oxidized below 300 C, which is due to the formation of substantial Cu-Mn solid solutions and a large number of Cu 2+ /Mn 3+ ions on the surface of SiO 2 . The activation energy of C 6 H 6 in CuMn 2 /TiO 2 is 95.50 kJ/mol, while that of the other three catalysts is close, probably 60 kJ/mol. Moreover, the stability of SiO 2 is the highest and can be maintained for more than 60 hours. The fundamental reason of catalyst deactivation is the higher diffusion resistance on the surface of the catalyst with small pore size distribution and the lack of surface oxygen, which leads to the lower degree of complete oxidation of C 6 H 6 .

Research progress on the preparation of transition metal-modified zeolite catalysts and their catalytic performance for the purification of engine exhausts

“…Due to rapid global industrialization, volatile organic compounds (VOCs), as toxic exhaust pollutants, have a serious impact on sustainable development worldwide, posing a serious threat to human health and the ecological environment. 246,247 Therefore, VOC elimination has become an urgent need requiring solutions. Currently, adsorption, 248,249 biodegradation, 250 photocatalytic oxidation, 251,252 plasma catalysis, 253 ozone catalytic oxidation, 254 and other technologies are widely used in VOC treatments.…”

Ambient sunlight-driven high performance chlorinated volatile organic compound oxidation by Cu0.15Mn0.15Ce0.7Ox hollow spheres

“…Thus, CuO and MnO x with good catalytic activity for the destruction of CVOCs are employed to modify CeO 2 . 14,15 The Mn and Cu elements enter the lattice structure of CeO 2 , enhancing the surface oxygen and oxygen migration rate. 16 The synergistic effect of CuO and MnO x triggers a reduction in the redox potential and elevates the activity of the co-modified material.…”

Peroxymonosulfate Activation by Facile Fabrication of α-MnO2 for Rhodamine B Degradation: Reaction Kinetics and Mechanism

“…Numerous studies have been carried on different persulfate activation materials, including transitional metal ions (Mn 2+ , Co 2+ , Cu 2+ , Fe 2+ ) [32,33], transitional metal oxides [34], perovskite [35], and spinel catalysts [36]. Among them, transition metal oxides are excellent candidates in environmental applications in catalytic ozonation, photocatalysis, and VOCs' oxidation [37,38], due to their wide sources and variable valence states. Manganese oxides (MnO, MnO 2 , Mn 2 O 3 , Mn 3 O 4 ) are non-precious and have a high natural abundance, and they have been selected as promising candidates for the catalytic persulfate activation [39].…”