Issue

Vol. 25 No. 3 (2013): Vol 25 Issue 3

Copyright (c) 2013 AJC

Creative Commons License

This work is licensed under a Creative Commons Attribution 4.0 International License.

Optimization of Pyrolysis for MgO Recycling in Magnesia-Based Flue Gas Desulfurization

https://doi.org/10.14233/ajchem.2013.12836
Wanzhong Kang
College of Resources & Environmental Engineering, East China University of Science & Technology, Shanghai 200237, P.R. China
Yanbo Zhou
College of Resources & Environmental Engineering, East China University of Science & Technology, Shanghai 200237, P.R. China
Zhigang Shen
College of Resources & Environmental Engineering, East China University of Science & Technology, Shanghai 200237, P.R. China
Xuanyi Tang
College of Resources & Environmental Engineering, East China University of Science & Technology, Shanghai 200237, P.R. China
Jun Lu
College of Resources & Environmental Engineering, East China University of Science & Technology, Shanghai 200237, P.R. China

Corresponding Author(s) : Jun Lu

lujun@ecust.edu.cn

Asian Journal of Chemistry, Vol. 25 No. 3 (2013): Vol 25 Issue 3

Abstract

The magnesia (MgO)-based flue gas desulfurization process can effectively remove sulfur dioxide and the absorbent-MgO can be recycled via the pyrolysis of the major flue gas desulfurization byproduct MgSO3. In the current study, the pyrolysis conditions of the flue gas desulfurization byproducts was optimized to achieve efficient MgO recycling in the laboratory. The optimal pyrolysis conditions were 550 ºC and 10 K/min heating rate. The dried MgSO3 was found to have higher decomposition efficiency than the sample with moisture. The decomposition efficiency of MgSO3 reached 90 %, whereas the MgO content in the pyrolyzed product reached 70 % and had ideal reactivity. The actual byproducts from the power plant were also pyrolyzed under the optimal conditions and compared with the MgSO3 samples produced in laboratory. Given the existence of impurities, the pyrolysis effect of the actual byproducts was slightly inferior to the laboratory-produced MgSO3. Therefore, the impurity content of the byproducts must be decreased to efficiently recycle MgO.

Keywords

Magnesia-based flue gas desulfurization Pyrolysis MgO Reactivity
Kang, W., Zhou, Y., Shen, Z., Tang, X., & Lu, J. (2012). Optimization of Pyrolysis for MgO Recycling in Magnesia-Based Flue Gas Desulfurization. Asian Journal of Chemistry, 25(3), 1250–1254. https://doi.org/10.14233/ajchem.2013.12836
Download Citation
Endnote/Zotero/Mendeley (RIS)
BibTeX
References
  1. K. Felsvang, D.B. Olsen and F. Jensen, Environ. Prog., 18, 75 (1999).
  2. B.J.P. Buhre, L.K. Elliott, C.D. Sheng, R.P. Gupta and T.F. Wall, Prog. Energy Combust. Sci., 31, 283 (2005).
  3. Q. Zhong, Coal Fired Flue Gas Desulfurization and Denitration Technology and Engineering Applications, Chemical Industry, Beijing, edn. 2 (2007).
  4. G. Hu, K. Dam-Johansen, S. Wedel and J.P. Hansen, Prog. Energy Combust. Sci., 32, 386 (2006).
  5. Z. Chen, H. Xu, M. Bai, C. Wu and J. Chu, Fresenius Environ. Bull., 19, 2644 (2010).
  6. A. Lancia, D. Musmarra and F. Pepe, Ind. Eng. Chem. Res., 36, 197 (1997).
  7. N. Ilten and U. Sungur, Fresenius Environ. Bull., 18, 2295 (2009).
  8. Y.G. Zhou, M.C. Zhang, D.F. Wang and L. Wang, Ind. Eng. Chem. Res., 44, 8830 (2005).
  9. Y.C. Chen and J.H. Shyh, Powder Technol., 154, 14 (2005).
  10. C.F. Liu and S.M. Shih, Ind. Eng. Chem. Res., 43, 184 (2004).
  11. S. Fabrizio, M.D. Ascenzo and A. Lancia, Sep. Purif. Technol., 34, 43 (2004).
  12. W.A. Dick, Y. Hao, R.C. Stehouwer, J.M. Bigham, W.E. Wolfe and D. Adriano, Land Application of Agricultural, Industrial and Municipal By-Products. Madison, WI: Soil Science, Society of America, pp. 505-536 (2000).
  13. J.M. Bigham, D.A. Kost, R.C. Stehouwer, J.H. Beeghly, R. Fowler, S.J. Traina, W.E. Wolfe and W.A. Dick, Fuel, 84, 1839 (2005).
  14. L. Chen, W.A. Dick and S. Nelson, Environ. Pollut., 114, 161 (2001).
  15. S.Y. Li, P.L. Lan, S.G. Xu, X.R. Liao, C.H. Chen and X.C. Xu, Chin. J. Soil Sci., 35, 441 (2004).
  16. J.H. Beeghly, Product Development of FGD Recovered Magnesium Hydroxide, Proceedings of 16th Annual International Pittsburgh Coal Conference, pp. 462-467 (1999).
  17. A. Urbanek and K. Kumanowski, Chem. Abstr., 137, 113391 (2002)
Read More
Author biographies is not available.
Download
PDF
Statistic
Read Counter : 0 Download : 0