水分条件下碳黑氧化气体排放特性的实验研究

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Abstract Based on the particle oxidation process during the regeneration of Diesel Particulate Filter (DPF), the gas emission under different temperatures (495~565℃), water concentrations (0~9%), oxygen concentrations (5%~21%) and catalysts on the oxidation process of uniformly stacked carbon black particle layer were studied in a fixed bed reactor. Gas emissions were measured using a gas analyzer to obtain the emission characteristics of carbon black oxidation. The experimental results showed that increasing temperature, oxygen concentration and adding catalysts promoted the oxidation of carbon black, and CeO₂ or Pt/Al₂O₃ catalysts reduced CO near to zero. However, the addition of water vapor decreased the emissions of CO₂ and CO, as well as the oxidation efficiency. This inhibition effect was more pronounced at higher oxygen concentrations. When the water concentration increased from 0% to 9%, the gas emission and oxidation efficiency first decreased, then increased, with the strongest effect at 3%. Ultimately, the emission of CO₂ increased. In addition, the CO₂/CO ratio of carbon black oxidation emission decreased with an increase in temperature, with little effect by oxygen concentration. This ratio gradually increased with water concentration.

Key words： carbon black particles layer water vapor catalysts CO₂/CO gas emissions

Received: 15 December 2022

PACS:

X701.7

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	Articles by authors
	MENG Zhong-wei
	WU Dai-geng
	HUANG Jun-feng
	JIANG Yan-zhi

Cite this article:

MENG Zhong-wei,WU Dai-geng,HUANG Jun-feng等. Experimental study on gas emission characteristics of carbon black oxidation under water condition[J]. CHINA ENVIRONMENTAL SCIENCECE, 2023, 43(7): 3360-3367.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2023/V43/I7/3360

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