Catalytic combustion of coke and NO reduction in-situ under the action of Fe, Fe–CaO and Fe–CeO2

Zhiping Lei, Jingchong Yan, Jia Fang, Hengfu Shui, Shibiao Ren, Zhicai Wang, Zhanku Li, Ying Kong and Shigang Kang

Energy, 2021, vol. 216, issue C

Abstract: Efficient and inexpensive catalysts are crucial to the industrial application of catalytic combustion of coal or coke. The effect of Fe and Fe–CaO on the coke combustion and the in-situ reduction of NO emission were investigated in this work. In addition, Fe–CeO2 was used for comparison due to its excellent performance reported in the literature. It is found that 1–2 %Fe addition effectively catalyzed coke combustion, and the combustion index and burnout index increased by a factor of 1.2 and 1.4, respectively. CaO significantly improved the catalytic performance of Fe on coke combustion. By adding 4–10% CaO and 2% Fe simultaneously, the combustion index and burnout index of coke were increased by 1.4 and 1.9 times, respectively. By contrast, CeO2 had little effect on Fe-catalyzed coke combustion. The NO emission was reduced by 16.7% by adding 2% Fe during coke combustion. The NO abatement increased to 38.4% and 39.6%, respectively, when adding 10% CaO and 4% CeO2 to coke combustion with 2% Fe. It was concluded that Fe could promote the decomposition of NO, as well as the reactions of C–NO and NO–CO, simultaneously.

Keywords: Coke combustion; NO reduction; Fe-based catalysts (search for similar items in EconPapers)
Date: 2021
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Citations: View citations in EconPapers (2)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:216:y:2021:i:c:s0360544220323537

DOI: 10.1016/j.energy.2020.119246

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