Understanding adsorption mechanisms of mercury over unburned carbon

Li-jun, Fang; Liu, Zhenxing; Wu, Chongchong; Jiao, Shaohui; Gao, Zhengyang; Gates, Ian D.; Ding, Xiaobin; Yang, Weijie

doi:10.1016/j.fuel.2022.126399

Cited by 9 publications

(2 citation statements)

References 54 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In previous studies, the zigzag and armchair models were used in several studies with different applications to model carbonaceous surfaces. 89 , 90 , 91 , 92 …”

Section: Resultsmentioning

confidence: 99%

Adsorption dynamics of Cd2+(aq) on microwave-synthetized pristine biochar from cocoa pod husk: Green, experimental, and DFT approaches

Correa-Abril,

Stahl,

Cabrera

et al. 2024

iScience

View full text Add to dashboard Cite

“…In previous studies, the zigzag and armchair models were used in several studies with different applications to model carbonaceous surfaces. 89 , 90 , 91 , 92 …”

Section: Resultsmentioning

confidence: 99%

Adsorption dynamics of Cd2+(aq) on microwave-synthetized pristine biochar from cocoa pod husk: Green, experimental, and DFT approaches

Correa-Abril,

Stahl,

Cabrera

et al. 2024

iScience

View full text Add to dashboard Cite

“…The absorbed energy E ads during the calculation reflects the energy change of the adsorption process, and the expression is shown in eq : E ads = E Hg + surface − ( E Hg + E surface ) where E ads is the adsorption energy, kJ/mol; E Hg+surface is the energy of the system after adsorption, kJ/mol; E Hg is the energy of the adsorbend mercury, kJ/mol; and E surface is the energy of the adsorbent, kJ/mol. E ads < 0 indicates that adsorption is an exothermic process, and the larger the negative value, the stronger the adsorption capacity of the adsorbent.…”

Section: Resultsmentioning

confidence: 99%

Multiscale Understanding of the Mechanism of Mercury Removal by Acid–Chlorine-Modified Biomass Coke: Experiments and Simulations

Le,

Wang,

Zeng

et al. 2023

Energy Fuels

View full text Add to dashboard Cite

Coal-fired power plants are a significant source of mercury pollution, necessitating the development of inexpensive and efficient adsorbents for mercury removal. This work proposes the preparation of an adsorbent using acid-chlorine-modified rice straw coke for this purpose. The characterization of the adsorbent shows that the modification increases the surface pore structure and makes the surface carry abundant oxygen-containing functional groups, which is conducive to improving the mercury removal capacity of the adsorbent. This work studies the effects of the acid–chlorine ratio, mass ratio, inlet mercury concentration, and reaction temperature on the desorption performance of modified rice straw coke and investigates the mechanism of mercury removal by combining the kinetic model and density functional theory. The results demonstrate that the optimal effect of the combined acid–chlorine modification is achieved at an acid–chlorine ratio and mass ratio of 1:2. The reaction temperature has a significant effect on the efficiency of mercury removal, and the increase of the inlet mercury concentration can promote mercury removal. The mercury adsorption process is primarily controlled by surface mass transfer and chemisorption, with chemisorption being the critical control step. The introduction of Cl and O atoms through modification creates doped structures that are highly conducive to mercury adsorption. The Cl atom exhibits greater reactivity toward the Hg atom, facilitating the removal of mercury. The presence of O atoms not only increases the abundance of oxygen-containing functional groups on the surface, but also enhances the activity of the Cl atoms. These findings provide valuable theoretical support for the application of biomass coke in the field of mercury removal, addressing mercury pollution associated with coal-fired power plants.

show abstract

Effect of SO2 on HCl removal over ethanol-hydrated CaO adsorbent: Mechanism of competitive adsorption and product layer shielding

Liu

Wang

et al. 2023

Chemical Engineering Journal

View full text Add to dashboard Cite

Understanding adsorption mechanisms of mercury over unburned carbon

Cited by 9 publications

References 54 publications

Adsorption dynamics of Cd2+(aq) on microwave-synthetized pristine biochar from cocoa pod husk: Green, experimental, and DFT approaches

Adsorption dynamics of Cd2+(aq) on microwave-synthetized pristine biochar from cocoa pod husk: Green, experimental, and DFT approaches

Multiscale Understanding of the Mechanism of Mercury Removal by Acid–Chlorine-Modified Biomass Coke: Experiments and Simulations

Effect of SO2 on HCl removal over ethanol-hydrated CaO adsorbent: Mechanism of competitive adsorption and product layer shielding

Contact Info

Product

Resources

About