Citation: WU Hai-Tao, ZHUO Qi-Dong, YANG Zi, SHI Jian-Dong, CHEN Hong-Jian, YIN Wen-Yu, TANG Xiao-Yan, MA Yun-Shen, YUAN Rong-Xin. Cyclic Regeneration of Potassium-Modified Activated Semi-coke by Impregnation Method for Flue Gas Desulfurization[J]. Chinese Journal of Inorganic Chemistry, ;2019, 35(8): 1427-1435. doi: 10.11862/CJIC.2019.175 shu

Cyclic Regeneration of Potassium-Modified Activated Semi-coke by Impregnation Method for Flue Gas Desulfurization

1.
College of Chemistry, Chemical Engineering and Materials Science of Soochow University, Suzhou, Jiangsu 215500, China
2.
Key Laboratory of Advanced Functional Materials, Changshu Institute of Technology, Changshu, Jiangsu 215500, China

Corresponding author: YUAN Rong-Xin, yuanrx@cslg.edu.cn
Received Date: 22 November 2018
Revised Date: 30 May 2019

Figures(8)

The potassium modified Activated Semi-coke (K/ASC) for SO₂ removal was prepared using potassium carbonate (K₂CO₃) by the impregnation method. The ASC modified by 10%(w/w) K₂CO₃ (K10) exhibited good SO₂ removal efficiency at 120℃. From 400 to 700℃, the higher the regeneration temperature is, the better is the desulfurization activity of K10 after regeneration. Cyclic regeneration of K10 (K10-R-600-n) showed that the sample had the best desulfurization performance after four regeneration cycles (K10-R-600-4), and its sulfur capacity was 68.9 mg·g^-1, 24.37% higher than that of K10 (55.4 mg·g^-1). The desulfurization products are divided into physisorbed SO₂, H₂SO₄ and sulfate. The deposition of sulfate, which does not decompose after regeneration, results in the decrease of the desulfurization activity. The sulfur capacity of the sample after ten regeneration cycles (K10-R-600-10) remained 70% that of the fresh K10.
- semi-coke,
- SO₂,
- desulfurization,
- cyclic regeneration
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沈阳化工大学材料科学与工程学院沈阳 110142