Oxidation and catalytic characteristics of particulate with O2／NO2 condition
1. School of Automotive and Transportation Engineering, Xihua University, Chengdu, Sichuan 610039, China; 2. Key Laboratory of Fluid and Power Machinery, Ministry of Education， Xihua University， Chengdu, Sichuan 610039, China; 3. Chengdu Dongyang Blue Environmental Protection Equipment Co.， Ltd.， Chengdu, Sichuan 610039, China
Abstract：The effects of catalyst on the oxidation characteristics of carbon black were investigated by the thermogravimetric analyzer under different O2 volume fractions and NO2 atmosphere. The oxidation kinetics analyses were respectively conducted by the ABSW in differential method and the Arrhenius method. The results show that in the early stage of oxidation from 45 to 350 ℃, the activation energy of carbon black is decreased from 183 kJ·mol-1 to 111 kJ·mol-1 with the increasing of NO2 concentration. Under the catalytic conditions, the activation energy is decreased from 162 kJ·mol-1 to 109 kJ·mol-1. At the stage of postoxidation from 350 to 800 ℃, the activation energy of particles is decreased with the increasing of NO2 concentration, and is decreased most under the catalytic state with decreasing value from 28 to 52 kJ·mol-1. In the whole oxidation process from 45 to 800 ℃, the activation energy of carbon black is decreased with latter increasing with the increasing of NO2 concentration. Under the action of catalyst, the most decreasing of activation energy can reach 93 kJ·mol-1 when the volume fraction of NO2 is 1×10-3.
2019, Vol. 40 
