Removal of vapor-phase elemental mercury by N-doped CuCoO4 loaded on activated carbon

Mei, Zhijian; Shen, Zhemin; Yuan, Tao; Wang, Wenhua; Han, Haibo

doi:10.1016/j.fuproc.2007.02.002

Cited by 26 publications

(12 citation statements)

References 24 publications

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“…5,6 Chemically modified activated carbons have shown a greater effectiveness in most of the cases. 7 The feasibility of using noncarbon sorbents such as mineral sulfides, mineral oxides modified with various functional groups such as amine, amide, thiol, and urea was also investigated. 8 To devise a complete strategy of Hg emission control, the final fate of captured Hg must be considered, which depends largely on the stability of Hg associated with activated carbons.…”

Section: ' Introductionmentioning

confidence: 99%

Sequential Extraction Study of Stability of Adsorbed Mercury in Chemically Modified Activated Carbons

Tong

Fan

Mei

et al. 2011

Environ. Sci. Technol.

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Activated carbons chemically modified with sulfur and bromine are known for their greater effectiveness in capturing vapor Hg from coal combustion and other industrial flue gases. The stability of captured Hg in spent activated carbons determines the final fate of Hg and is critical to devising Hg control strategy. However, it remains a subject that is largely unknown, particularly for Br-treated activated carbons. Using a six-step sequential extraction procedure, this work evaluated the leaching potential of Hg captured with four activated carbons, one lignite-derived activated carbon, and three chemically treated with Br(2), KClO(3), and SO(2). The results demonstrated clearly the positive effect of Br- and SO(2)-treatment on the stability of captured Hg. The Hg captured with brominated activated carbon was very stable and likely in the form of mercurous bromide complex. Sulfur added at high temperature with SO(2) was able to stabilize a majority of Hg by forming sulfide and possibly sulfonate chelate. The presence of sulfate however made a small fraction of captured Hg (<10%) labile under mild conditions. Treating activated carbon with KClO(3) lowered the overall stability of captured Hg. A positive dependence of Hg stability on Hg loading temperature was observed for the first time.

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Section: ' Introductionmentioning

confidence: 99%

Sequential Extraction Study of Stability of Adsorbed Mercury in Chemically Modified Activated Carbons

Tong

Fan

Mei

et al. 2011

Environ. Sci. Technol.

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“…In addition, controlling the Cu 2 O/Cu ratio for well-developed porous structures is essential for optimal Hg 0 adsorption. Cu–Co mixed oxides have been used as the primary active sites for Hg 0 capture. ,, Notably, Cu 1.5 Co 1.5 O 4 presented the highest Hg 0 removal capacity of all the as-prepared materials, wherein HgO is the primary species on the surface of the spent sorbent. In addition, the spent Cu 1.5 Co 1.5 O 4 can be regenerated via thermal decomposition at 400 °C.…”

Section: Current Classification Of Solid Materialsmentioning

confidence: 99%

Heterogeneous Reaction Mechanisms and Functional Materials for Elemental Mercury Removal from Industrial Flue Gas

Hong

et al. 2021

ACS EST Eng.

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Gaseous elemental mercury (Hg0) is of increasing concern in industrial flue gases because of its difficult disposal. Currently, catalysis conversion and adsorption to oxidized species (Hg2+) and particle-bonded states (Hgp) are two common Hg0 disposal methods. While no clear boundary exists between these methods, the selection of technologies for practical applications highly depends on the gas temperature, mercury concentration, and gas components over a solid material. This review aims to describe some principles for solid material selection, discusses the heterogeneous reaction mechanisms for gaseous Hg0 conversion, classifies the various types of catalysts and sorbents, and summarizes their potential applications. Gaseous Hg0 undergoes interface physical adsorption, catalytic oxidation, and chemical adsorption processes. Overcoming the surface bonding energies can convert the Hg0 to Hg2+ via the catalytic process. Meanwhile, strong bonding energies can ensure chemical adsorption, resulting in mercury surface solidification. On this basis, the catalysts and sorbents materials, the reaction mechanism, and different types of solid materials were evaluated. We clearly discussed the reaction mechanism over different type of functional materials for Hg0 removal, to provide recommendations for studies to address concerns regarding laboratory-scale to full-scale applications. Moreover, some key parameters and a basic understanding of the practical applications were proposed.

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“…The CO 2 uptakes measured at 1 atm under 273 K and 298 K were summarized in Table 7 (Nos. [20][21][22].…”

Section: Non-metal Doped Porous Carbonmentioning

confidence: 99%

“…[20,21] MOFs composed by a variety of metals can be good precursors for metal/metal oxide decorated porous carbon. While most of the articles related to this area do not concentrate on the properties in porosity, BET surface areas and pore volumes can be important to some extent.…”

Section: Non-metal Doped Porous Carbonmentioning

confidence: 99%

Metal‐Organic Frameworks Derived Porous Carbons: Syntheses, Porosity and Gas Sorption Properties

Pei

Chen

et al. 2016

Chin. J. Chem.

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Porous carbon materials derived from metal-organic frameworks (MOFs) have been brought into stage due to the intrinsic advantages of MOFs such as high porosity and tailorable structure diversity, which might provide infinite possibility in producing porous carbons with diverse structures and various decorations. Inherited from MOFs, the porosity in carbon materials is an important factor to evaluate the performances of porous carbons (e.g. gas sorption properties, electrochemical and catalytic behaviors). Factors that affect the porosity of porous carbon materials are mainly focused on the porosity of pristine MOFs, additives and conducting conditions. However, during past decades there were still no systematical reports on the influence factors of porosity in MOFs derived porous carbon materials and corresponding gas sorption properties. In this review, we will summarize the performances of MOF-derived carbon materials (i.e. non-doped porous carbons, heteroatoms doped porous carbons, metal/metal oxide decorated porous carbons) and give a detailed discussion about the connections between the properties and four major effects (calcination temperature, loading of additional precursor, post-synthetic treatment as well as intrinsic properties of MOFs).

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Removal of vapor-phase elemental mercury by N-doped CuCoO4 loaded on activated carbon

Cited by 26 publications

References 24 publications

Sequential Extraction Study of Stability of Adsorbed Mercury in Chemically Modified Activated Carbons

Sequential Extraction Study of Stability of Adsorbed Mercury in Chemically Modified Activated Carbons

Heterogeneous Reaction Mechanisms and Functional Materials for Elemental Mercury Removal from Industrial Flue Gas

Metal‐Organic Frameworks Derived Porous Carbons: Syntheses, Porosity and Gas Sorption Properties

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