Citation: HONG Dongyang, ZHOU Jinsong, ZHOU Qixin. Effect of Hydrogen Sulfur on the Removal of Elemental Mercury with Activated Carbon[J]. Chinese Journal of Applied Chemistry, ;2019, 36(10): 1194-1201. doi: 10.11944/j.issn.1000-0518.2019.10.190007 shu

Effect of Hydrogen Sulfur on the Removal of Elemental Mercury with Activated Carbon

State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China

Corresponding author: ZHOU Jinsong, zhoujs@zju.edu.cn
Received Date: 9 January 2019
Revised Date: 9 April 2019
Accepted Date: 29 May 2019

Fund Project: the National Natural Science Foundation of China 51576173Supported by the National Natural Science Foundation of China(No.51576173)

Figures(5)

H₂S is a component with sulfur in coal gas and it is worth studying whether activated carbon can catalyze the H₂S in coal gas to form active sulfur, so as to promote the synergistic removal of H₂S and Hg⁰. In this paper, the mechanism of H₂S influence on the removal of Hg⁰ from activated carbon was analyzed by temperature programmed desorption method and thermodynamics. H₂S significantly weakened the adsorption of activated carbon on Hg⁰ in low temperature, which may be caused by the consumption of adsorbed oxygen on the surface of activated carbon and the substitution of oxygen in oxygen containing functional groups by H₂S. Then the feasibility of H₂S in coal gas to remove Hg⁰ and H₂S in high temperature was discussed. High temperature sulfuration cannot effectively sulfurize activated carbon with active sulfur. Therefore, mercury removal in the form of HgS with H₂S as a sulfur source is not a feasible method by activated carbon. The mechanism revealed here in on the influence of H₂S on Hg⁰ removal from pure activated carbon provides the guidance for designing activated carbon for gas mercury removal.
- hydrgen sulfide,
- mercury,
- activated carbon,
- thermodynamics,
- temperature programmed desorption
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