Citation: XU Hao, ZHANG Cheng, YUAN Chang-le, YU Sheng-hui, LI Quan, FANG Qing-yan, CHEN Gang. Study on arsenic adsorption characteristics by mineral elements in simulated flue gas atmosphere[J]. Journal of Fuel Chemistry and Technology, ;2019, 47(7): 876-883. shu

Study on arsenic adsorption characteristics by mineral elements in simulated flue gas atmosphere

State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Wuhan 430074, China

Corresponding author: ZHANG Cheng, chengzhang@mail.hust.edu.cn
Received Date: 27 March 2019
Revised Date: 14 May 2019

Fund Project: The project was supported by the National Key Research and Development Program of China (2018YFB0605105)the National Key Research and Development Program of China 2018YFB0605105

Figures(9)

The adsorption characteristics of As₂O₃(g) by CaO, Fe₂O₃, MgO, Al₂O₃, K₂SO₄ and Ca/Fe mixed adsorbents under the simulated flue gas atmosphere were studied by using a gas phase arsenic adsorption reaction experimental device at temperatures between 300 and 900℃. The results indicate that the adsorption ability of CaO is the strongest among the five single element adsorbents, while K₂SO₄ is the weakest. With the increase of temperature, the adsorption amount of CaO increases first, decreases slightly at 700℃, and then increases, while the adsorption amount of Fe₂O₃ increases first, and then decreases. However, the adsorption amount of MgO, Al₂O₃ and K₂SO₄ increases all the way. Compared with the calculated values of adsorption amounts of Ca/Fe mixed adsorbents in three proportions, the experimental values increase by 92% at least. The adsorption effect is the best when the ratio of CaO to Fe₂O₃ is 3:1. And the change of surface structure caused by sintering reaction after mixing is an important reason for the improvement of the adsorption effect.
- As₂O₃(g),
- adsorbents,
- flue gas atmosphere,
- mixed adsorbents
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