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With the continuous development of the social economy, the increasingly serious problem of pollution of volatile organic compounds (VOCs). Aromatic hydrocarbons serious pollution of the atmosphere, posing a serious threat to people's health, has attracted widespread attention. In many processing method, the catalytic combustion due to low combustion temperatures, high combustion efficiency, low energy consumption, no secondary pollution is seen as the treatment of VOCs to the most promising technology. In the entire processing system, the catalyst is more critical part, its performance is directly related to the efficiency of the catalytic combustion. The commonly used catalysts include precious metals, transition metal oxides. The noble metal catalyst activity is high, but considering the price resources or other factors, the transition metal oxides in addition to activity slightly inferior, the other aspects of its more competitive and its research. First SiO 2 for the carrier, MMn (M, Cu, Fe, Co, Ni) as active component, prepared by impregnation of the supported catalyst. Was prepared to improve the catalytic performance, the the Ce modified FeMn series catalyst, its activity, and different space velocity on the catalyst activity was evaluated at atmospheric pressure, and the catalyst stability test. The evaluation results showed that: 2 system, Fe, Mn, molar ratio at the same time, the active ingredient content of 30% when the catalyst with optimal activity; the content of the active ingredient, Fe, in the FeMn / SiO Mn molar ratio relative to the catalytic activity, the airspeed to 3.4 × 10 4 h -1 , toluene concentration of 1000ppm conditions, toluene 250 ℃ ignition, 280 ℃ complete combustion. Airspeed increases, there is a certain decrease in catalyst activity. Using XRD, TPR to characterize the structure: the active ingredient content is low, the surface of the carrier uniformly distributed, but redox weak; the active component content is high, the content of more species enriched in the surface of the carrier is formed crystal, improve the reducing ability of the oxidation catalyst; SBA-15 as the carrier, CoMn active ingredient, prepared by impregnation of the supported catalyst. Evaluation of the performance of the catalyst, and under conditions of different airspeed its activity, and found that the content of the active ingredient in CoMn molar ratio of 3:7, the catalyst has a good activity; in CoMn molar ratio of 3:7, the content of active ingredient is The catalyst activity at 35%: airspeed of 3.4 × 10 4 H -1 , the concentration of toluene 1000ppm, toluene 235 ℃ burning, 265 ° C for complete combustion. Airspeed increases, the catalyst activity first increases and then decreases. By XRD, TPR, transmission electron microscopy (TEM), BET structural characterization: higher levels of active component channels have some shrinkage, pore size, pore volume, reduce the specific surface area has to a certain extent, but the mesoporous structure remains. For enhanced heat transfer performance, reduce the pressure drop, the reference supported catalyst active data base, to the CoMn oxide as active component, the FeCrAl alloy sheet for the first carrier, SBA-15, Al 2 O 3 the second carrier prepared and evaluated the performance of metal-based catalysts, different airspeed of catalyst performance. Active ingredient content is the same, CoMn molar ratio of 3:7 with optimal activity; the fixed the CoMn molar ratio, the active ingredient content of 40% of the catalyst activity, at an airspeed of 3.4 × 10 4 h -1 , toluene concentration of 1000ppm, the ignition 250 ℃, 335 ℃ complete combustion.
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