Citation: YU Meng-zhu, WANG Hai, HUANG Ya-ji, ZHU Zhi-cheng, FAN Cong-hui, DONG Lu, CHENG Hao-qiang. Characteristics of selenium capture by typical Ca-/Mg-based sorbents[J]. Journal of Fuel Chemistry and Technology, ;2020, 48(11): 1335-1344. shu

Characteristics of selenium capture by typical Ca-/Mg-based sorbents

1.
Key Laboratory of Energy Thermal Conversion and Control of the Ministry of Education, Southeast University, Nanjing 210096, China
2.
Zhejiang Branch of GD Power Development Co. Ltd., Ningbo 315043, China

Corresponding author: HUANG Ya-ji, heyyj@seu.edu.cn
Received Date: 10 September 2020
Revised Date: 4 October 2020

Fund Project: Natural Science Foundation of Jiangsu Province BK20181281National Key Research and Development Project 2018YFB0605102National Nature Science Foundation of China 51976036The project was supported by National Key Research and Development Project (2018YFB0605102), National Nature Science Foundation of China (51976036), and Natural Science Foundation of Jiangsu Province (BK20181281)

Figures(24)

The characteristics of Se capture by CaO, CaCO₃, and MgO which are main components of Ca-/Mg-based mineral sorbents at 500-800 ℃ and that by calcite and dolomite were investigated, and the CaO obtained from calcine minerals were also used to capture Se. The results showed that capacity of CaO for Se capture was the highest, and the maximum value at 800 ℃ was 368 mg/g. Capacity of CaCO₃ on Se adsorption at 700 ℃ was the largest and thermostability of the used CaCO₃ was better. Se adsorption of Mg-based sorbents at medium temperature was obvious. The trend for Se adsorption capacity of calcite with increasing temperature was similar to that of CaCO₃. Effect of calcite on Se capture was better than that of CaCO₃, which was attributed to the higher specific surface area and pore volume of calcite. The ability of F-sor obtained from calcined calcite for Se capture was better than that of C-sor from calcined CaCO₃ as well as that of CaO, which was likely due to higher specific surface area and pore volume of F-sor. Moreover, the used F-sor showed better thermostability at higher temperature, and the maximum adsorption capacity of F-sor was 403 mg/g.
- selenium,
- Ca-based sorbents,
- Mg-based sorbents,
- calcite,
- calcined calcite
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