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Nitrogen conversion during rapid pyrolysis of coal and petroleum coke in a high-frequency furnace

Author

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  • Yuan, Shuai
  • Zhou, Zhi-jie
  • Li, Jun
  • Wang, Fu-chen

Abstract

Rapid pyrolysis of three typical Chinese coals, lignite from Inner Mongolia, bituminous from Shenfu coalfield, and anthracite from Guizhou, as well as a petroleum coke were carried out in a drop-style high-frequency furnace. The reactor was induction coil heated and had a very small high-temperature zone, which could restrain secondary conversions of nitrogen products. The effects of temperature and coal rank on conversions of fuel-N to primary nitrogen products (char-N, HCN–N, NH3–N and (tar+N2)–N) have been investigated. The results showed that, the increasing temperature reduced the yields of char-N and promoted the conversion of fuel-N to N2. Char-N yields increased, while volatile-N yields decreased as the coal rank increased. In most of the conditions, NH3–N yields were higher than HCN–N yields during rapid pyrolysis of coal. In the case of petroleum coke, NH3–N yields increased gradually with the increasing temperature, but no HCN was detected. We argue that NH3–N can be formed directly through the primary pyrolysis without secondary reactions. Although volatile-N yields of lignite were higher than those of bituminous, yields of (HCN+NH3)–N in volatile-N of lignite were lower than those of bituminous. While the (HCN+NH3)–N yields of anthracite were the lowest of the three coals. Both of the (HCN+NH3)–N yields and (HCN+NH3)–N proportions in volatile-N of petroleum coke were lower than the three coals.

Suggested Citation

  • Yuan, Shuai & Zhou, Zhi-jie & Li, Jun & Wang, Fu-chen, 2012. "Nitrogen conversion during rapid pyrolysis of coal and petroleum coke in a high-frequency furnace," Applied Energy, Elsevier, vol. 92(C), pages 854-859.
  • Handle: RePEc:eee:appene:v:92:y:2012:i:c:p:854-859
    DOI: 10.1016/j.apenergy.2011.08.042
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    Cited by:

    1. Nikolaos Margaritis & Christos Evaggelou & Panagiotis Grammelis & Roberto Arévalo & Haris Yiannoulakis & Polykarpos Papageorgiou, 2023. "Application of Flexible Tools in Magnesia Sector: The Case of Grecian Magnesite," Sustainability, MDPI, vol. 15(16), pages 1-30, August.
    2. Li, Shiyuan & Xu, Mingxin & Jia, Lufei & Tan, Li & Lu, Qinggang, 2016. "Influence of operating parameters on N2O emission in O2/CO2 combustion with high oxygen concentration in circulating fluidized bed," Applied Energy, Elsevier, vol. 173(C), pages 197-209.
    3. Huan Li & Huawei Mou & Nan Zhao & Yaohong Yu & Quan Hong & Mperejekumana Philbert & Yuguang Zhou & Hossein Beidaghy Dizaji & Renjie Dong, 2021. "Nitrogen Migration during Pyrolysis of Raw and Acid Leached Maize Straw," Sustainability, MDPI, vol. 13(7), pages 1-15, March.
    4. Liukkonen, Mika & Hälikkä, Eero & Hiltunen, Teri & Hiltunen, Yrjö, 2012. "Dynamic soft sensors for NOx emissions in a circulating fluidized bed boiler," Applied Energy, Elsevier, vol. 97(C), pages 483-490.
    5. Luo, Lei & Zhang, Hai & Jiao, Anyao & Jiang, Yuanzhen & Liu, Jiaxun & Jiang, Xiumin & Tian, Feng, 2019. "Study on the formation and dissipation mechanism of gas phase products during rapid pyrolysis of superfine pulverized coal in entrained flow reactor," Energy, Elsevier, vol. 173(C), pages 985-994.
    6. Aime Hilaire Tchapda & Sarma V. Pisupati, 2014. "A Review of Thermal Co-Conversion of Coal and Biomass/Waste," Energies, MDPI, vol. 7(3), pages 1-51, February.
    7. Phiri, Zebron & Everson, Raymond C. & Neomagus, Hein W.J.P. & Wood, Barry J., 2018. "Transformation of nitrogen functional forms and the accompanying chemical-structural properties emanating from pyrolysis of bituminous coals," Applied Energy, Elsevier, vol. 216(C), pages 414-427.
    8. Meng, Xiaoxiao & Sun, Rui & Ismail, Tamer M. & El-Salam, M. Abd & Zhou, Wei & Zhang, Ruihan & Ren, Xiaohan, 2018. "Assessment of primary air on corn straw in a fixed bed combustion using Eulerian-Eulerian approach," Energy, Elsevier, vol. 151(C), pages 501-519.

    More about this item

    Keywords

    Rapid pyrolysis; Coal; Nitrogen; HCN; NH3;
    All these keywords.

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