Roles of Sulfuric Acid in Elemental Mercury Removal by Activated Carbon and Sulfur-Impregnated Activated Carbon

2012 ◽  
Vol 46 (14) ◽  
pp. 7905-7912 ◽  
Author(s):  
Eric A. Morris ◽  
Donald W. Kirk ◽  
Charles Q. Jia ◽  
Kazuki Morita
Keyword(s):  
Activated Carbon ◽  
Sulfuric Acid ◽  
Elemental Mercury ◽  
Mercury Removal

Correction to Roles of Sulfuric Acid in Elemental Mercury Removal by Activated Carbon and Sulfur-impregnated Activated Carbon

2012 ◽  
Vol 46 (19) ◽  
pp. 10857-10857 ◽  
Author(s):  
Eric A. Morris ◽  
Donald W. Kirk ◽  
Charles Q. Jia ◽  
Kazuki Morita
Keyword(s):  
Activated Carbon ◽  
Sulfuric Acid ◽  
Elemental Mercury ◽  
Mercury Removal

Synthesis of CeO2-modified activated carbon spheres by grafting and coordinating reactions for elemental mercury removal

2018 ◽  
Vol 54 (4) ◽  
pp. 2836-2852 ◽  
Author(s):  
Changming Zhang ◽  
Wen Song ◽  
Xiaochao Zhang ◽  
Rui Li ◽  
Songjian Zhao ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Elemental Mercury ◽  
Mercury Removal ◽  
Carbon Spheres ◽  
Modified Activated Carbon ◽  
Activated Carbon Spheres

scholarly journals Role of Activated Carbon Precursor for Mercury Oxidation and Removal: Oxidized Surface and Carbene Site Interaction

Processes ◽  
2021 ◽  
Vol 9 (7) ◽  
pp. 1190
Author(s):  
Regina Rodriguez ◽  
Domenic Contrino ◽  
David Mazyck
Keyword(s):  
Activated Carbon ◽  
Nitric Acid ◽  
Gas Phase ◽  
Functional Groups ◽  
Bituminous Coal ◽  
Activated Carbons ◽  
Elemental Mercury ◽  
Coconut Shell ◽  
Mercury Removal ◽  
Oxygen Functional Groups

Activated carbon (AC) is widely accepted for the removal of inorganic contaminants like mercury; however, the raw material used in the production of activated carbon is not always taken into consideration when evaluating its efficacy. Mercury oxidation and adsorption mechanisms governed by carbene sites are more likely to occur when graphitic-like activated carbons (such as those produced from high-ranking coals) are employed versus lignocellulosic-based ACs; this is likely due to the differences in carbon structures where lignocellulosic materials are less aromatic. In this research, the team studied bituminous coal-based ACs in comparison to coconut shell and wood-based (both less aromatic) ACs for elemental mercury removal. Nitric acid of 0.5 M, 1 M, and 5 M concentrations along with 10 M hydrogen peroxide were used to oxidize the surface of the ACs. Boehm titrations and FTIR analysis were used to quantify the addition of functional groups on the activated carbons. A trend was observed herein, resulting in increasing nitric acid molarity and an increased quantity of oxygen-containing functional groups. Gas-phase mercury removal mechanisms including physisorption, oxygen functional groups, and carbene sites were evaluated. The results showed significantly better elemental mercury removal in the gas phase with a bituminous coal-based AC embodying similar physical and chemical characteristics to that of its coconut shell-based counterpart. The ACs treated with various oxidizing agents to populate oxygen functional groups on the surface showed increased mercury removal. It is hypothesized that nitric acid treatment creates oxygen functional groups and carbene sites, with carbene sites being more responsible for mercury removal. Heat treatments post-oxidation with nitric acid showed remarkable results in mercury removal. This process created free carbene sites on the surface and shows that carbene sites are more reactive to mercury adsorption than oxygen. Overall, physisorption and oxygen functional groups were also dismissed as mercury removal mechanisms, leaving carbene-free sites as the most compelling mechanism.

Role of SO2for Elemental Mercury Removal from Coal Combustion Flue Gas by Activated Carbon

2008 ◽  
Vol 22 (4) ◽  
pp. 2284-2289 ◽  
Author(s):  
Md. Azhar Uddin ◽  
Toru Yamada ◽  
Ryota Ochiai ◽  
Eiji Sasaoka ◽  
Shengji Wu
Keyword(s):  
Activated Carbon ◽  
Flue Gas ◽  
Coal Combustion ◽  
Elemental Mercury ◽  
Mercury Removal

Synthesis and evaluation of activated carbon spheres with copper modification for gaseous elemental mercury removal

2018 ◽  
Vol 26 (3) ◽  
pp. 693-703 ◽  
Author(s):  
Changming Zhang ◽  
Wen Song ◽  
Xiaochao Zhang ◽  
Rui Li ◽  
Songjian Zhao ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Elemental Mercury ◽  
Mercury Removal ◽  
Carbon Spheres ◽  
Gaseous Elemental Mercury ◽  
Activated Carbon Spheres

Using H2S plasma to modify activated carbon for elemental mercury removal

Fuel ◽  
2019 ◽  
Vol 254 ◽  
pp. 115549 ◽  
Author(s):  
Mengting Shi ◽  
Guangqian Luo ◽  
Yang Xu ◽  
Renjie Zou ◽  
Hailu Zhu ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Elemental Mercury ◽  
Mercury Removal

scholarly journals An Overview of Mercury Emission Sources and Application of Activated Carbon for Mercury Removal from Flue Gas

2019 ◽  
Vol 10 (1) ◽  
pp. 1 ◽  
Author(s):  
Hidayu Abdul Rani ◽  
Nor Fadilah Mohamad ◽  
Sherif Abdulbari Ali ◽  
Sharmeela Matali ◽  
Sharifah Aishah Sheikh Abdul Kadir
Keyword(s):  
Activated Carbon ◽  
Flue Gas ◽  
Water Movement ◽  
Elemental Mercury ◽  
Waste Incineration ◽  
Anthropogenic Sources ◽  
Mercury Removal ◽  
Mercury Emission ◽  
Natural Sources ◽  
Removal Technology

Mercury emission into the atmosphere is a global concern due to its detrimental effects on human health in general. The two main sources of mercury emission are natural sources and anthropogenic sources. Mercury emission from natural sources include volcanic activity, weathering of rocks, water movement and biological processes which are obviously inevitable. The anthropogenic sources of mercury emission are from coal combustion, cement production and waste incineration. Thus, in order to reduce mercury emission it is appropriate to investigate how mercury is released from the anthropogenic sources and consequently the mercury removal technology that can be implemented in order to reduce mercury emission into the atmosphere. Many alternatives have been developed to reduce mercury emission and the recent application of activated carbon showed high potential in the adsorption of elemental mercury. This paper discusses the ability of activated carbon and variable parameters that influence mercury removal efficiency in flue gas.

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