Removal of gaseous Hg0 using biomass porous carbons modified by an environmental-friendly photochemical technique

Liu, Ying; Wang, Yan; Dou, Zhifei; Liu, Yangxian

doi:10.1016/j.cej.2022.141152

Cited by 9 publications

(3 citation statements)

References 70 publications

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“…Carbon materials such as activated carbons, carbon nanofibers, carbon nanotubes, and graphenes demonstrate excellent electric conductivity, outstanding mechanical properties, and acid-resistance, endowing wide application in energy- and environment-related areas. 144–150 During the past few years, carbon nanotubes (CNTs) including single-walled CNTs (SWCNTs) and multi-walled CNTs (MWCNTs) have been demonstrated to be effective additives to enhance the performance of many semiconductors. Myint et al 151 reported a composite of F4TCNQ-doped CNT yarn/P3HT, which produces a high room-temperature thermoelectric power factor of 1640–2160 μW mK −2 .…”

Section: Application Of P3ht In Thermoelectricsmentioning

confidence: 99%

Recent progress of poly(3-hexylthiophene)-based materials for thermoelectric applications

Zhu,

He,

Zhang

et al. 2024

Mater. Chem. Front.

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Section: Application Of P3ht In Thermoelectricsmentioning

confidence: 99%

Recent progress of poly(3-hexylthiophene)-based materials for thermoelectric applications

Zhu,

He,

Zhang

et al. 2024

Mater. Chem. Front.

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“…Coal-fired power plants are one of the main sources of mercury emissions. − As a highly toxic heavy-metal element, mercury has the characteristics of persistence, bioaccumulation, and long-distance migration, which poses a huge threat to human health and the ecological environment. , As of 2016, 128 countries and regions have signed the Minamata Convention aimed at protecting human health and the environment from mercury and its mercury compounds . Mercury in coal combustion flue gas is mainly composed of elemental mercury (Hg 0 ), divalent mercury (Hg 2+ ), and particulate mercury (Hg P ). − Since elemental mercury is insoluble in water, the capture of elemental mercury is a key link in the removal of mercury from flue gas. , …”

Section: Introductionmentioning

confidence: 99%

Elemental Mercury Removal from Coal-Fired Flue Gas on Sulfur-Modified Activated Biomass Coke: Experiment and Simulation

Zeng

Wang

Kang

et al. 2023

Ind. Eng. Chem. Res.

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It is necessary to find a better method to remove mercury from coal-fired flue gas. This work proposes the use of corn stalk coke to remove mercury from coal-fired flue gas and through elemental sulfur (CSC-S), water vapor activation (CSC-H 2 O), and sulfur modification combined with water vapor activation (CSC-H 2 O-S) to prepare three different adsorbents. The mercury removal performance of the adsorbents prepared by different methods was evaluated on a small fixed-bed mercury removal experimental platform. The experimental results showed that the order of mercury removal efficiency of the four adsorbents was: CSC-H 2 O-S > CSC-S > CSC-H 2 O > CSC. Brunauer−Emmett−Teller (BET), Fourier transform infrared (FTIR) spectroscopy, and Xray photoelectron spectroscopy (XPS) were adopted to study the physical and chemical properties of the adsorbent surface and the mechanism of mercury removal. The results showed that water vapor activation can improve the pore structure of the adsorbent, increase its specific surface area, and generate new oxygen-containing functional groups on the surface of the adsorbent. The adsorption kinetic model further demonstrated that the water vapor activation process can improve the physical adsorption performance of corn stalk char, and the sulfur modification process can improve the chemical adsorption performance of corn stalk char. Quantum chemical studies have shown that the surface structure doped with S and O atoms is conducive to enhancing the adsorption of Hg 0 .

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“…For example, carbon-based adsorbents and metal oxides can cause SO 2 poisoning during mercury removal, leading to a decrease in the activity of the adsorbent and even poisoning deactivation . Although precious metal adsorbents have excellent performance, their high cost is unsuitable for large-scale applications . Therefore, it is necessary to develop Hg 0 adsorption materials with a high adsorption capacity, strong temperature adaptability, and resistance to SO 2 poisoning.…”

Section: Introductionmentioning

confidence: 99%

Excellent Mercury Removal in High Sulfur Atmosphere Using a Novel CuS-BDC-2D Derived by Metal–Organic Frame

Li,

Zhao,

Sun

et al. 2023

Environ. Sci. Technol.

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To effectively remove high concentrations of mercury in a high sulfur atmosphere of nonferrous smelting flue gas, a novel two-dimensional CuS-MOF (CuS-BDC-2D) material is synthesized by anchoring S to Cu sites in the Cu-BDC MOF. The highly dispersed CuS active sites and MOF framework structural properties in CuS-BDC-2D enable efficiently collaborate in capturing mercury. CuS-BDC-2D exhibits a layered floral structure with high specific surface area and thermal stability, with poor crystallinity. Compared to CuS and the three-dimensional CuS-MOF (CuS-BDC-3D) structure, CuS-BDC-2D demonstrates significantly higher mercury capture capacity due to the high exposure of active sites and defects sites in the two-dimensional material. Moreover, CuS-BDC-2D exhibits excellent resistance to sulfur, maintaining its high efficiency in removing Hg 0 even at high levels of sulfur dioxide (SO 2 ), such as 5000−20,000 ppm. The superior performance of CuS-BDC-2D makes it suitable for controlling mercury emissions in actual nonferrous smelting flue gas. This discovery also paves the way for the development of new mercury adsorbents, which can guide future advancements in this field.

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Removal of gaseous Hg0 using biomass porous carbons modified by an environmental-friendly photochemical technique

Cited by 9 publications

References 70 publications

Recent progress of poly(3-hexylthiophene)-based materials for thermoelectric applications

Recent progress of poly(3-hexylthiophene)-based materials for thermoelectric applications

Elemental Mercury Removal from Coal-Fired Flue Gas on Sulfur-Modified Activated Biomass Coke: Experiment and Simulation

Excellent Mercury Removal in High Sulfur Atmosphere Using a Novel CuS-BDC-2D Derived by Metal–Organic Frame

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