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. shu

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

Corresponding author: WANG Xin-ye, xinye.wang@njnu.edu.cn
Received Date: 11 September 2020
Revised Date: 28 September 2020

Fund Project: the National Natural Science Foundation of China 51706106The project was supported by the National Key R & D Program of China (2018YFB0605102), the National Natural Science Foundation of China (51706106) and the Key R & D Program of Jiangsu Province (SBE2019740303)the National Key R & D Program of China 2018YFB0605102the Key R & D Program of Jiangsu Province SBE2019740303

Figures(8)

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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