Efficient removal of Hg <superscript>0</superscript> from cement kiln flue gas using Ce <subscript>x</subscript> Fe <subscript>y</subscript> O <subscript>z</subscript> composite catalyst. - OpacWWW

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Tytuł:: Efficient removal of Hg from cement kiln flue gas using Ce x Fe y O z composite catalyst.
Autorzy:: Yang Y; College of Resources and Environment, China-Serbia 'The Belt and Road' Joint Laboratory on Environment and Energy, Chengdu University of Information Technology, Chengdu, 610225, Sichuan, China.
Guo J; College of Resources and Environment, China-Serbia 'The Belt and Road' Joint Laboratory on Environment and Energy, Chengdu University of Information Technology, Chengdu, 610225, Sichuan, China.
Zhao Z; College of Resources and Environment, China-Serbia 'The Belt and Road' Joint Laboratory on Environment and Energy, Chengdu University of Information Technology, Chengdu, 610225, Sichuan, China.
Yang J; Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming, 650093, Yunnan, China.
Cao J; College of Resources and Environment, China-Serbia 'The Belt and Road' Joint Laboratory on Environment and Energy, Chengdu University of Information Technology, Chengdu, 610225, Sichuan, China.
Zhang Q; College of Resources and Environment, China-Serbia 'The Belt and Road' Joint Laboratory on Environment and Energy, Chengdu University of Information Technology, Chengdu, 610225, Sichuan, China.
Liu S; College of Resources and Environment, China-Serbia 'The Belt and Road' Joint Laboratory on Environment and Energy, Chengdu University of Information Technology, Chengdu, 610225, Sichuan, China. shengyuliu_.
Źródło:: Environmental science and pollution research international [Environ Sci Pollut Res Int] 2023 Jul; Vol. 30 (33), pp. 79821-79834. Date of Electronic Publication: 2023 Jun 01.
Typ publikacji:: Journal Article
Język:: English
Imprint Name(s):: Publication: <2013->: Berlin : Springer
Original Publication: Landsberg, Germany : Ecomed
MeSH Terms:: Air Pollutants*/analysis
Mercury*/analysis
Oxidation-Reduction ; Temperature ; Oxygen
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Grant Information:: No. 2022JDRC0101 the Science and Technology Department of Sichuan Province; No. 21676032 National Natural Science Foundation of China; No. KYTZ202014 Chengdu University of Information Technology; No. J201513 Chengdu University of Information Technology; No. 14TD0020 Education Department of Sichuan Province; No. 2016-GH02-00032-HZ Chengdu Science and Technology Bureau; No. 2015-HM01-00127-SF Chengdu Science and Technology Bureau
Contributed Indexing:: Keywords: Cement kiln flue gas; Chemisorbed oxygen; Coprecipitation method; Electron transfer; Elemental mercury removal; Oxygen vacancy structure
Substance Nomenclature:: 0 (Air Pollutants)
S88TT14065 (Oxygen)
FXS1BY2PGL (Mercury)
Entry Date(s):: Date Created: 20230601 Date Completed: 20230717 Latest Revision: 20240327
Update Code:: 20240327
DOI:: 10.1007/s11356-023-27781-w
PMID:: 37261688
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In this study, a kind of Ce x Fe y O z composite with oxygen vacancy structure and strong oxygen storage capacity was prepared by coprecipitation method. Under the condition of no HCl of flue gas, the Hg 0 in the flue gas of cement kiln was efficiently and economically removed by using 6-8% oxygen. The results showed that the optimum preparation conditions of the catalyst were Ce-Fe molar ratio of 1-11 and calcination temperature of 550 °C. In addition, the reaction temperature, space velocity, the concentration of O 2 , SO 2 , and NO had significant effects on the removal efficiency of Hg 0 at different rates. More precisely, at the reaction temperature of 350 °C, low airspeed, high concentration of O 2 , and low concentration of SO 2 and NO, the efficiency reached the highest value. According to XPS results, the elemental valence of the Ce x Fe y O z composite changed after the reaction. The redox pairs of Ce 3+ -Ce 4+ and Fe 3+ -Fe 2+ had the ability to transfer electrons, which enabled more oxygen adsorbed on the catalyst surface to be converted into O 2 - , leading to the improvement of the oxidation efficiency of Hg 0 .
(© 2023. The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.)

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Efficient removal of Hg 0 from cement kiln flue gas using Ce x Fe y O z composite catalyst.