O2／NO2氛围下颗粒物的氧化催化特性试验

方嘉; 蒋渊; 孟忠伟; 秦源; 李健

doi:10.3969/j.issn.1671-7775.2019.05.004

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江苏大学学报（自然科学版） ›› 2019, Vol. 40 ›› Issue (5) : 518-523. DOI: 10.3969/j.issn.1671-7775.2019.05.004

论文

O₂／NO₂氛围下颗粒物的氧化催化特性试验

作者信息 +

Oxidation and catalytic characteristics of particulate with O₂／NO₂ condition

Author information +

文章历史 +

摘要

采用热重分析仪,在不同体积分数O2，NO2氛围下,研究了催化剂对碳黑颗粒的氧化特性的影响,并分别采用微分法中的ABSW法和阿仑尼乌斯法进行氧化动力学分析.结果表明:NO2和O2对颗粒的燃烧具有一定协同作用,氧化前期(45～350 ℃),颗粒的活化能随着NO2体积分数的升高逐渐从183 kJ·mol-1降低到111 kJ·mol-1,在催化条件下,活化能从162 kJ·mol-1降低到109 kJ·mol-1;氧化后期(350～800 ℃),颗粒的活化能随着NO2体积分数的升高逐渐降低,且在催化状态下降低最多,降幅约28～52 kJ·mol-1;氧化全过程(45～800 ℃)试验中,颗粒活化能随着NO2体积分数的升高呈现先下降后升高的趋势,催化剂作用下在NO2体积分数为1×10-3时,下降最明显,活化能降低约93 kJ·mol-1.

Abstract

The effects of catalyst on the oxidation characteristics of carbon black were investigated by the thermogravimetric analyzer under different O₂ volume fractions and NO₂atmosphere. 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 postoxidation from 350 to 800 ℃, the activation energy of particles is decreased with the increasing of NO₂concentration, 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.

导出引用

方嘉, 蒋渊, 孟忠伟, 等. O₂／NO₂氛围下颗粒物的氧化催化特性试验[J]. 江苏大学学报（自然科学版）, 2019, 40(5): 518-523 https://doi.org/10.3969/j.issn.1671-7775.2019.05.004

FANG Jia, JIANG Yuan, MENG Zhong-Wei, et al. Oxidation and catalytic characteristics of particulate with O₂／NO₂ condition[J]. Journal of Jiangsu University(Natural Science Edition), 2019, 40(5): 518-523 https://doi.org/10.3969/j.issn.1671-7775.2019.05.004

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