Synthesis of hierarchical porous carbon loaded with chlorine and its mercury removal performance

SHI Qi-qi; WANG Yu-ting; SHEN Bo-xiong; ZHANG Xiao

Volume 47 Issue 8

Aug. 2019

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SHI Qi-qi, WANG Yu-ting, SHEN Bo-xiong, ZHANG Xiao. Synthesis of hierarchical porous carbon loaded with chlorine and its mercury removal performance[J]. Journal of Fuel Chemistry and Technology, 2019, 47(8): 1000-1007.

Citation:

SHI Qi-qi, WANG Yu-ting, SHEN Bo-xiong, ZHANG Xiao. Synthesis of hierarchical porous carbon loaded with chlorine and its mercury removal performance[J]. Journal of Fuel Chemistry and Technology, 2019, 47(8): 1000-1007.

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Synthesis of hierarchical porous carbon loaded with chlorine and its mercury removal performance

SHI Qi-qi¹,
WANG Yu-ting¹,
SHEN Bo-xiong^{1, 2
,
,},
ZHANG Xiao^{1, 2
,
,}

1.
School of Energy and Environment Engineering, Hebei University of Technology, Tianjin 300401, China;
2.
Tianjin Key Laboratory of Clean Energy and Pollution Control, Tianjin 300401, China

Funds:

the National Natural Science Foundation Youth Project 51808181

Tianjin Natural Science Foundation Key Project 18JCZDJC39800

Tianjin Science and Technology Major Special Project and Engineering 18ZXSZSF00040

Tianjin Science Popularization Project 18KPXMSF00080

Tianjin Platform Project 18PTZWHZ00010

Tangshan Science and Technology Project 18130211A

More Information

Corresponding author: SHEN Bo-xiong, E-mail: shenbx@hebut.edu.cn; ZHANG Xiao, E-mail: zhangxiao@hebut.edu.cn
Received Date: 2019-03-12
Rev Recd Date: 2019-05-12

Available Online: 2021-01-23

Publish Date: 2019-08-10

Abstract

Abstract

Chlorine-loaded hierarchical porous bio-char was prepared by co-pyrolysis using nano-CaCO₃ as template and rice straw as carbon precursor. The removal of mercury (Hg⁰) from flue gas by porous materials was studied on a fixed bed test bench with simulated flue gas. The materials were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), N₂ adsorption-desorption (BET), temperature programmed desorption (Hg-TPD) and X-ray photoelectron spectroscopy (XPS). The results show that HCl impregnation not only removes the products on the template to form porous structures but also effectively loads chlorine onto the surface of the material. The specific surface area and total pore volume of B1C1-Cl2 are 398.1 m²/g and 0.4923 cm³/g, respectively. When the GHSV is 225000 h^-1 at 120 ℃, the removal efficiency of Hg⁰ by chemical adsorption is up to 95%. The porous structure is beneficial to gas diffusion and the high specific surface area can provide more active sites. The covalent groups (C-Cl) participating in the Hg⁰ removal process are the dominant chemical adsorption sites on the inner micro-mesopore surface.
- elemental mercury,
- porous bio-chars,
- chlorine,
- adsorption,
- flue gas

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References(25)

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