Effect of water vapor on lead adsorption by kaolinite at high temperatures

CHENG Yun; Lü Wen-ting; JIA Ji-qiang; ZHANG Ji-dong; BU Chang-sheng; ZHANG Ju-bing; WANG Xin-ye

Volume 48 Issue 11

Nov. 2020

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Article Navigation > Journal of Fuel Chemistry and Technology > 2020 > 48(11): 1327-1334

CHENG Yun, Lü Wen-ting, JIA Ji-qiang, ZHANG Ji-dong, BU Chang-sheng, ZHANG Ju-bing, WANG Xin-ye. Effect of water vapor on lead adsorption by kaolinite at high temperatures[J]. Journal of Fuel Chemistry and Technology, 2020, 48(11): 1327-1334.

Citation:

CHENG Yun, Lü Wen-ting, JIA Ji-qiang, ZHANG Ji-dong, BU Chang-sheng, ZHANG Ju-bing, WANG Xin-ye. Effect of water vapor on lead adsorption by kaolinite at high temperatures[J]. Journal of Fuel Chemistry and Technology, 2020, 48(11): 1327-1334.

Citation:

CHENG Yun, Lü Wen-ting, JIA Ji-qiang, ZHANG Ji-dong, BU Chang-sheng, ZHANG Ju-bing, WANG Xin-ye. Effect of water vapor on lead adsorption by kaolinite at high temperatures[J]. Journal of Fuel Chemistry and Technology, 2020, 48(11): 1327-1334.

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Effect of water vapor on lead adsorption by kaolinite at high temperatures

1.
Jiangsu Provincial Key Laboratory of Materials Cycling and Pollution Control, School of Energy and Mechanical Engineering, Nanjing Normal University, Nanjing 210023, China
2.
Hefei Cement Research & Design Institute Corporation Ltd., Hefei 230051, China
3.
Jiangsu Shiqing Environmental Technology Co., Ltd., Nanjing 210012, China
4.
Everbright Ecological Environment Design and Research Institute Co., Ltd., Nanjing 211100, China

Funds:

the National Key R & D Program of China 2018YFB0605102

the National Natural Science Foundation of China 51706106

the Key R & D Program of Jiangsu Province SBE2019740303

More Information

Corresponding author: WANG Xin-ye, Tel:025-85481124, E-mail:xinye.wang@njnu.edu.cn
Received Date: 2020-09-11
Rev Recd Date: 2020-09-28

Available Online: 2021-01-23

Publish Date: 2020-11-10

Abstract

Abstract

The effect of water vapor on lead adsorption by kaolinite at high temperatures was studied using a drop tube furnace. The lead was in the forms of PbO and PbCl₂. Firstly, effect of 0-20% water vapor was studied on adsorption of PbO (1100-1300 ℃) and PbCl₂ (800-1300 ℃) by kaolinite. Then, mechanism of high-temperature adsorption of kaolin was revealed according to the analysis of XRD, SEM and residual hydroxyl group fraction. The results showed that water vapor reduced the loss of hydroxyl groups on kaolinite surface at high temperatures, hindering PbO adsorption and promoting PbCl₂ adsorption. At the same time, due to production of inert mullite and collapse of pore structure of kaolinite at high temperatures, the optimal adsorption temperatures of PbO and PbCl₂ were 1200 and 1000 ℃, respectively.
- kaolinite,
- lead,
- adsorption,
- high temperature,
- water vapor

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References(40)

References

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