Mass Transfer Characteristics of Gypsum-Fly Ash Slurry for Wet Flue Gas Desulfurization


Article Preview

In the limestone/gypsum wet flue gas desulfurization pilot-scale test rig, key parameters such as SO2 absorption rate, mass transfer were experimentally determined.The results show that desulphurizing capacity of gypsum and fly ash is relatively weaker, which is only equivalent to fresh limestone with a content of 0.27% and 1.5% respectively. pH-t curve of slurry with different levels of fly ash could be divided into a sharply increasing stage and a steadily increasing stage. The leaching content of Mn2+ is about 9 times of Fe3+ , Mn2+ can form intermediate complex with HSO3- in the solution, which can induce catalytic reaction and accelerate SO2 absorption. Fly ash in gypsum slurry can obviously promote desulfurization. The pH value of slurry is high at the initial reaction stage, and effect of fly ash on SO2 absorption rate is less than 1.5%. when the pH value is decreased to 5.0, The leaching content of Mn2+ will grow with the decrease of pH value, better catalytic efficiency can be gained, effect of fly ash on SO2 absorption rate can increase 6.0% at most. The reaction is controlled by liquid phase resistance; the ratio of gas phase resistance to overall resistance is less than 38%. Mn2+ concentration of slurry increases with pH value decreasing and fly ash concentration increasing, which has significant effect on catalyzed oxidation of SO32-.



Advanced Materials Research (Volumes 356-360)

Edited by:

Hexing Li, Qunjie Xu and Daquan Zhang




D. P. Zhang et al., "Mass Transfer Characteristics of Gypsum-Fly Ash Slurry for Wet Flue Gas Desulfurization", Advanced Materials Research, Vols. 356-360, pp. 1461-1468, 2012

Online since:

October 2011




[1] Revathi. V., Narasimha. V. L., Jayanthi. S: Modern Applied Science , Vol. 3(2009), p.144.

[2] Tianjin Li, Yuqun Zhuo, Junyong Lei: The Korean J. of Chem Eng, Vol. 24(2007), p.1114.

[3] YuRan Li, HaiYing Qi, ChangFu You: Fuel, Vol. 86(2007), p.1030.

[4] Yuran Li, et al: The 7th China-Korea Workshop on Clean Energy Technology, 2008, p.183.

[5] Meng Xu, Denxing Li, Qiming Wang:J. of Combust Sci. and Technol, Vol. 10(2004), p.64.

[6] Rundong Li, Yongfeng Nie:J. of Fuel Chem and Technol, Vol. 32(2004), p.177 (in Chinese).

[7] Zhongbiao Wu, Yue Liu, YU Shiqing: Environ Sci., Vol. 23(2002), p.45 (in Chinese).

[8] Shiqing Yu, Zhongbiao Wu. Environ Pollut and Prev, Vol. 24(2002), p.336(in Chinese).

[9] X.C. Qiao, C.S. Poon, C. Cheeseman. Waste manag, Vol. 26(2006), p.145.

[10] Jensen, PE. Journal of Chemical Technology & Biotechnology, Vol. 82(2007), p.1762.

[11] Hiroaki Tsuchiai, tomohiro Ishizuka: Ind Eng ChemRes, Vol. 34(1995), p.1407.

[12] WANG Chunfeng, U Jiansheng, SUN Xia: J of Environ Sci., Vol. 21(2009), p.131(in Chinese).

[13] Yongqi Lu, Xiaohong Yao, Jiming Hao: Environ Sci., Vol. 20(1999), p.17 (in Chinese).

[14] Xiang Gao, Wang Huo, Yi Zhong.: Chem Eng of Chinese U, Vol. 24(2008), p.690.

[15] Manoj V. Dagaonkar, Antonie A.C.M. Beenackers: Chem. Eng J, Vol. 81(2001), p.207.

[16] Xiaoqin Wu, Zhongbiao Wu:J. of Environ Sci., Vol. 16(2004), p.975.

[17] Qian Du, Shaohua Wu: J. of Chem Ind and Eng, 2003, Vol. 54(2003), p.1491 (in Chinese).

Fetching data from Crossref.
This may take some time to load.