Citation: YANG Jian-guo, HUANG Zhou, GENG Zi-wen, ZHAO Hong, YUAN Wei-zhong, CHEN Xi-jiong, TENG Wei-ming. Effects of different alkali-based materials on coal-fired flue gas dechlorination[J]. Journal of Fuel Chemistry and Technology, ;2018, 46(8): 934-939. shu

Effects of different alkali-based materials on coal-fired flue gas dechlorination

1.
State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China
2.
Zhejiang Energy Changxing Power Generation Co., Ltd., Huzhou 313100, China
3.
Zhejiang Provincial Energy Group Co., Ltd., Hangzhou 310007, China

Corresponding author: ZHAO Hong, zhaohong@zju.edu.cn
Received Date: 25 April 2018
Revised Date: 11 June 2018

Fund Project: the Science and Technology Project of Zhejiang Provincial Energy Group ZNKJ-2016-030The project was supported by the Science and Technology Project of Zhejiang Provincial Energy Group (ZNKJ-2016-030)

Figures(5)

Three common alkali-based materials, NaOH, Na₂CO₃ and NaHCO₃, were utilized to explore their dechlorination performance in a simulated coal-fired flue gas. The results show that the dechlorination efficiency increases along with the enhancement of alkaline intensity. As the Na/Cl molar ratio reaches 5.8, 7.1 and 8.7, respectively, the dechlorination efficiency of all the three alkalis (NaOH, Na₂CO₃ or NaHCO₃) exceeds 70%. The SO₂ of high concentration in flue gas has competitive effects on dechlorination. With the increase in SO₂ concentration, the dechlorination efficiency drops linearly. The influence of SO₂ concentration on the dechlorination efficiency is almost identical regardless of different alkali-based materials. For per 100 mg/m³ augment in SO₂ concentration, the dechlorination efficiency decreases by about 1.4%. NaOH is determined to be the most valuable alkali-based material for industrial application considering the cost and solubility.
- coal-fired flue gas,
- dechlorination,
- zero discharge of desulfurization wastewater,
- NaOH,
- Na₂CO₃,
- NaHCO₃
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沈阳化工大学材料科学与工程学院沈阳 110142