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

XU Hao; ZHANG Cheng; YUAN Chang-le; YU Sheng-hui; LI Quan; FANG Qing-yan; CHEN Gang

Volume 47 Issue 7

Jul. 2019

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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.

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.

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.

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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

Funds:

the National Key Research and Development Program of China 2018YFB0605105

More Information

Corresponding author: ZHANG Cheng, Tel: 027-87542417-8321, Fax: 027-87545526, E-mail: chengzhang@mail.hust.edu.cn
Received Date: 2019-03-27
Rev Recd Date: 2019-05-14

Available Online: 2021-01-23

Publish Date: 2019-07-10

Abstract

Abstract

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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References(32)

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