Thermodynamic Investigation on SO₃ Distribution in Oxy-Fuel Combustion

Abstract:

Thermodynamic equilibrium is proposed to analyze the distribution of SO₃ in different flue gas circulation modes to study the migration law of sulfur for oxy-fuel combustion. Results indicate that the concentration of SO₂ increases dramatically when flue gas circulation is adopted with the decline of flue gas volume and the increase of oxygen concentration in oxy-fuel combustion, which results the increase of SO₃ concentration and formation rate. At 1200°C, thermodynamic equilibrium concentration of SO₂ and SO₃ are 5.3 times and 6.1 times respectively compared with conventional combustion. In Oxy1 circulation mode, SO₃ is the most sensitive to excess air coefficient and sulfur content, followed by Oxy2 circulation mode, while the conventional combustion has the lowest sensitivity. Therefore, SO₃ is greatly influenced by different flue gas circulation modes during oxy-fuel combustion.

• Periodical: Applied Mechanics and Materials (Volume 694)
• Pages: 498-503
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.694.498
• Online since: November 2014
• Authors: Hai Ping Xiao, Gao Yan Han*, Lin Dong, Xiang Ning
• Keywords: Flue Gas Recirculation, Oxy-Fuel Combustion, SO₃, Thermodynamic Equilibrium

References

[1] Z.Q. Wang, Q.C. Huan, C.L. Qi, et al: Energy Procedia, Vol. 12 (2011), p.1187.

[2] D. Fleig, F. Normann, K. Andersson, F. Johnsson, B. Leckner: Energy Procedia, Vol. 1 (2009), p.383.

DOI: 10.1016/j.egypro.2009.01.052

[3] D. Fleig, K. Andersson, F. Normann, and F. Johnsson: Industrial & Engineering Chemistry Research, Vol. 50 (2011), p.8505.

[4] T. Fujimori, T. Yamada: Proceedings of the Combustion Institute, Vol. 34 (2013), p.2111.

[5] E. Croiset, K.V. Thambimuthu: Fuel, Vol. 80 (2001), p.2117.

[6] B.E. Goh: Available from: http: /www. CO2 capture and storage. info/ networks/ Oxy-fuel 3rd2. htm.

[7] P. Monckert, B. Dhungel, R. Kull, J. Maier. In: 3rd MEETING of the OXY-FUEL COMBUSTION NETWORK 2008. Yokohama Symposia, Yokohama, Japan: IEA Greenhouse Gas R&D Programme.

[8] A.E. Weller, B.W. Rising, A.A. Boiarski, R.J. Nordstorm, R.E. Barrett, R.G. Luce: Report: ANL/CNSV-TM-168. Argonne National Laboratory(1985).

[9] P. He, J. Wu, X.M. Jiang, W.G. Pan, J.X. Ren: Applied Surface Science, Vol. 258 (2012), p.8853.

[10] R.E. Cook: Journal of the Air Pollution Control Association, Vol. 25 (2012), p.156.

[11] R. Hardman, R. Stacy: Conference on Formation, Distribution, Impact, and Fate of Sulfur Trioxide in Utility Flue-gas Streams, Pittsburgh(1998).

[12] J. Ahn, R. Okerlund, A. Fry, et al: International Journal of Greenhouse Gas Control, Vol. 5S (2011), p.127.

[13] P. Marier, H.P. Dibbs: Thermochimica Acta, Vol. 8 (1974), p.155.

[14] D. Fleig, et al: Combustion and Flame, Vol. 160 (2013), p.1142.

[15] D. Fleig: Chalmers University of Technology, Göteborg, Sweden(2012).