Coke preheating combustion study on NOx and SO2 emission

• Published in: Journal of the Energy Institute Vol. 97; pp. 131 - 137
• Main Authors: Xiaohe, Xiong, Zhaomin, Lv, Shilin, Yu, Houzhang, Tan, Baixiang, Xiang, Jun, Huang
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.08.2021
• Subjects: Coke; NOx; Preheating combustion; SO2; Preheating combustion; NOx; Coke; SO2
• ISSN: 1743-9671
• DOI: 10.1016/j.joei.2021.04.007

Aiming to further investigate preheating combustion technology on pollutants reduction impacts, a wider preheating temperature 600–1400 °C was conducted and the NOx and SO2 two pollutants emission were tested. Results showed that preheating combustion was an effective de-NOx technology but invalid for de-SO2. The increase of preheating temperature can boost NOx reduction and carbon burn off rate. The higher the preheating temperature, the larger the NOx reduction amplitude. When increasing the preheating temperature from 800 °C to 1400 °C, the NOx reduction rate could reach 20.2% and fly ash carbon could reduce 27.9% respectively. NO was the major composition in NOx. However, NO was decreased remarkably but NO2 increased by a certain margin in fuel-rich condition. To achieve ultra-low pollutants emission, NO2 should also be aroused attention besides NO. •A 600–1400 °C wider temperature range preheating combustion on pollutants emissions were well investigated.•Preheating combustion has pronouncedly de-NOx effect but no appreciable de-SO2 effect.•NO2 become dominant in NOx compositions in reducing ambiences.