Negative effect of SO2 on mercury removal over catalyst/sorbent from coal-fired flue gas and its coping strategies: A review

Li, Honghu; Peng, Xiyan; An, Malaviya; Zhang, Jingdong; Cao, Yanxiao; Liu, Wenjie

doi:10.1016/j.cej.2022.140751

Cited by 42 publications

(3 citation statements)

References 179 publications

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“…13,26 To solve the issue of SO 2 poisoning on mercury removal, some feasible approaches and strategies were proposed of increasing Hg 0 affinity, suppressing SO 2 adsorption, inhibiting SO 2 oxidation, enhancing active sites, promoting sulfate decomposition, and designing the micro-or meso-pores catalyst and sorbent structure. 27 The results demonstrated that the sulfur resistance of the adsorbent is of great significance for efficient mercury removal. Hence, the development of Fe-Mn adsorbents with high anti-SO 2 poisoning and mercury adsorption ability is of great significance for achieving recyclable mercury removal.…”

Section: Introductionmentioning

confidence: 94%

“…However, they are subject to being reduced by SO 2 which makes the adsorbent poisoned 13,26 . To solve the issue of SO 2 poisoning on mercury removal, some feasible approaches and strategies were proposed of increasing Hg 0 affinity, suppressing SO 2 adsorption, inhibiting SO 2 oxidation, enhancing active sites, promoting sulfate decomposition, and designing the micro‐ or meso‐ pores catalyst and sorbent structure 27 . The results demonstrated that the sulfur resistance of the adsorbent is of great significance for efficient mercury removal.…”

Section: Introductionmentioning

confidence: 99%

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Cu‐modified Fe‐Mn magnetic mercury adsorbent and anti‐SO₂ characteristic

Shang,

Gong,

Duan

et al. 2024

Asia-Pacific J Chem Eng

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A series of Fe6Mn1Cux adsorbents for mercury removal were prepared by using co‐precipitation and impregnation methods. The performance of mercury adsorption and anti‐SO2 characteristic was studied in a fixed‐bed experimental system. The effect of Cu doping amount, reaction temperature, and flue gas components on mercury removal was investigated. The mercury species on the spent adsorbent was analyzed through Hg‐TPD test. The physical–chemical features were characterized by using the N2 adsorption/desorption, VSM, XPS, and XRD. It was found that the Fe6Mn1Cu0.4 exhibited a high performance of mercury adsorption and well magnetic property and good sulfur resistance. Under high concentration of SO2, the average adsorption efficiency of Fe6Mn1Cu0.4 adsorbent achieved 99%. Cu modification optimized the pore structure and improved the mercury removal performance as well as SO2 resistance. The XPS analysis indicated that Mn4+ was the main form that played an important role in oxidizing Hg0, as a result of decrement of Mn4+ after mercury adsorption. Mercury adsorbed on the spent adsorbent was HgO and HgSO4.

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Section: Introductionmentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

Cu‐modified Fe‐Mn magnetic mercury adsorbent and anti‐SO₂ characteristic

Shang,

Gong,

Duan

et al. 2024

Asia-Pacific J Chem Eng

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“…Conversely, when both SO 2 and O 2 were present in the atmosphere, the Hg 0 removal efficiency increased from 95% to 98%, indicating that the simultaneous presence of SO 2 and O 2 facilitated Hg 0 removal. This may be due to (1) SO 2 is oxidized to SO 3 by the metal oxides on the adsorbent, and the SO 3 formed on the adsorbent surface oxidizes Hg 0 to Hg 2+ ; (2) in the gas phase, SO 2 binds to O 2 and oxidizes Hg 0 to Hg 2+ ; and (3) after SO 2 adsorption on the adsorbent, the adsorption activity of the neighboring adsorption sites is increased, which enhances the efficiency of the adsorbent [25,26]. It should be noted that although mercury removal by AC was not high, the experiments were conducted with the AC dosage as low as 20 mg.…”

Section: Effect Of Temperature On Mercury Removal Performancementioning

confidence: 99%

Application Study on the Activated Coke for Mercury Adsorption in the Nonferrous Smelting Industry

Zheng,

Li,

Jiang

et al. 2024

Sustainability

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The massive release of mercury undermines environmental sustainability, and with the official entry into force of the Minamata Convention, it is urgent to strengthen the control of mercury pollution. The effectiveness of activated coke (AC) in removing elemental mercury (Hg0) from high temperatures and sulfur nonferrous smelting flue gas before acid production was studied. Experimental results indicated that the optimal temperature for Hg0 adsorption by AC was 150 °C. And the adsorption of Hg0 by AC was predominantly attributed to physical adsorption. Flue gas components (SO2 and O2) impact studies indicated that O2 did not significantly affect Hg0 adsorption compared to pure N2. Conversely, SO2 suppressed the adsorption capacity, while the simultaneous presence of SO2 and O2 exhibited a synergistic effect in facilitating the removal of Hg0. The characterization results of X-ray photoelectron spectroscopy (XPS) indicated that the SO2 molecule favored to anchor at the Oα site, leading to the formation of SO3. This subsequently oxidized the mercury to HgSO4 instead of HgO. The study demonstrates that cheap and easily accessible AC applications in the adsorption of mercury technology may help improve the sustainability of the circular economy and positively impact various environmental aspects.

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Catalytic Oxidation of BTX (Benzene, Toluene, and Xylene) Using Metal Oxide Perovskites

Yuan,

Li,

Liu

et al. 2024

Adv Funct Materials

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The high toxicity, volatility, and dispersion of the light aromatics, benzene, toluene, and xylene (BTX) pose a serious threat to the environment and human health. Compared to incineration, catalytic oxidation technologies for BTX removal offer benefits such as low energy consumption, high efficiency, and low pollution. ABO3–type perovskite catalysts (ABO3–PCs) are particularly promising materials for the catalytic oxidation of BTX due to their high activity and thermal stability, as well as their adjustable elemental composition and flexible structure allowing their properties to be improved. Nonetheless, the full potential of ABO3–PCs for the oxidation of BTX has yet to be reached. This review systematically and critically analyses progress in the catalytic oxidation of BTX by ABO3–PCs. Catalytic performance is assessed for each category of perovskite, including non–doped, doped (A–, B–, or A/B–site doped), and loading type (noble metal, metal oxide, and matrix composite), with structure–activity relationships are established. A kinetic model and proposed mechanism for the catalytic oxidation of BTX are also presented. Finally, the challenges and opportunities of ABO3–PCs applied to BTX oxidation and other reactions are highlighted.

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Negative effect of SO2 on mercury removal over catalyst/sorbent from coal-fired flue gas and its coping strategies: A review

Cited by 42 publications

References 179 publications

Cu‐modified Fe‐Mn magnetic mercury adsorbent and anti‐SO₂ characteristic

Cu‐modified Fe‐Mn magnetic mercury adsorbent and anti‐SO₂ characteristic

Application Study on the Activated Coke for Mercury Adsorption in the Nonferrous Smelting Industry

Catalytic Oxidation of BTX (Benzene, Toluene, and Xylene) Using Metal Oxide Perovskites

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Negative effect of SO2 on mercury removal over catalyst/sorbent from coal-fired flue gas and its coping strategies: A review

Cited by 42 publications

References 179 publications

Cu‐modified Fe‐Mn magnetic mercury adsorbent and anti‐SO2 characteristic

Cu‐modified Fe‐Mn magnetic mercury adsorbent and anti‐SO2 characteristic

Application Study on the Activated Coke for Mercury Adsorption in the Nonferrous Smelting Industry

Catalytic Oxidation of BTX (Benzene, Toluene, and Xylene) Using Metal Oxide Perovskites

Contact Info

Product

Resources

About

Cu‐modified Fe‐Mn magnetic mercury adsorbent and anti‐SO₂ characteristic

Cu‐modified Fe‐Mn magnetic mercury adsorbent and anti‐SO₂ characteristic