Development of LnMnO 3+σ perovskite on low temperature Hg 0 removal
LnMnO (Ln = La, Pr, Nd, Sm, Eu, Gd or Dy) perovskites synthesized by sol-gel method were employed for gaseous elemental mercury (Hg ) removal from coal-fired flue gas. Characterization results revealed the structure of the perovskites presented a phase transition process from rhombohedral system to...
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| Veröffentlicht in: | Journal of environmental sciences (China) 2022-03, Vol.113, p.141 |
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| container_title | Journal of environmental sciences (China) |
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| creator | Shen, Qicheng Zhou, Jiacheng Ma, Chenglong Yang, Jie Cao, Limei Yang, Ji |
| description | LnMnO
(Ln = La, Pr, Nd, Sm, Eu, Gd or Dy) perovskites synthesized by sol-gel method were employed for gaseous elemental mercury (Hg
) removal from coal-fired flue gas. Characterization results revealed the structure of the perovskites presented a phase transition process from rhombohedral system to O- and O'-orthorhombic structure with the change of A-site rare earth elements. The perovskites showed satisfactory Hg
removal capacity in a narrow temperature range of 100-150°C. NdMnO
with an O-O' orthorhombic structure presented the best Hg
removal performance, which markedly depends on four factors: crystal structure, oxygen vacancy density, Mn
/Mn
ratio and surface element segregation. The Hg
removal mechanism was illustrated based on the mercury temperature programmed desorption experiment and X-ray photoelectron spectroscopy characterization. Both chemisorption and catalytic oxidation played a role in the Hg
removal process. Chemisorption dominated the Hg
removal, due to the slow catalytic oxidation rate at low temperature. This work preliminarily established the relation between the structure of rare earth manganese perovskite and Hg
removal performance. |
| doi_str_mv | 10.1016/j.jes.2021.04.007 |
| format | Article |
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(Ln = La, Pr, Nd, Sm, Eu, Gd or Dy) perovskites synthesized by sol-gel method were employed for gaseous elemental mercury (Hg
) removal from coal-fired flue gas. Characterization results revealed the structure of the perovskites presented a phase transition process from rhombohedral system to O- and O'-orthorhombic structure with the change of A-site rare earth elements. The perovskites showed satisfactory Hg
removal capacity in a narrow temperature range of 100-150°C. NdMnO
with an O-O' orthorhombic structure presented the best Hg
removal performance, which markedly depends on four factors: crystal structure, oxygen vacancy density, Mn
/Mn
ratio and surface element segregation. The Hg
removal mechanism was illustrated based on the mercury temperature programmed desorption experiment and X-ray photoelectron spectroscopy characterization. Both chemisorption and catalytic oxidation played a role in the Hg
removal process. Chemisorption dominated the Hg
removal, due to the slow catalytic oxidation rate at low temperature. This work preliminarily established the relation between the structure of rare earth manganese perovskite and Hg
removal performance.</description><identifier>ISSN: 1001-0742</identifier><identifier>DOI: 10.1016/j.jes.2021.04.007</identifier><identifier>PMID: 34963524</identifier><language>eng</language><publisher>Netherlands</publisher><subject>Air Pollutants ; Calcium Compounds ; Coal ; Mercury ; Oxides ; Temperature ; Titanium</subject><ispartof>Journal of environmental sciences (China), 2022-03, Vol.113, p.141</ispartof><rights>Copyright © 2021. Published by Elsevier B.V.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,776,780,27903,27904</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/34963524$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Shen, Qicheng</creatorcontrib><creatorcontrib>Zhou, Jiacheng</creatorcontrib><creatorcontrib>Ma, Chenglong</creatorcontrib><creatorcontrib>Yang, Jie</creatorcontrib><creatorcontrib>Cao, Limei</creatorcontrib><creatorcontrib>Yang, Ji</creatorcontrib><title>Development of LnMnO 3+σ perovskite on low temperature Hg 0 removal</title><title>Journal of environmental sciences (China)</title><addtitle>J Environ Sci (China)</addtitle><description>LnMnO
(Ln = La, Pr, Nd, Sm, Eu, Gd or Dy) perovskites synthesized by sol-gel method were employed for gaseous elemental mercury (Hg
) removal from coal-fired flue gas. Characterization results revealed the structure of the perovskites presented a phase transition process from rhombohedral system to O- and O'-orthorhombic structure with the change of A-site rare earth elements. The perovskites showed satisfactory Hg
removal capacity in a narrow temperature range of 100-150°C. NdMnO
with an O-O' orthorhombic structure presented the best Hg
removal performance, which markedly depends on four factors: crystal structure, oxygen vacancy density, Mn
/Mn
ratio and surface element segregation. The Hg
removal mechanism was illustrated based on the mercury temperature programmed desorption experiment and X-ray photoelectron spectroscopy characterization. Both chemisorption and catalytic oxidation played a role in the Hg
removal process. Chemisorption dominated the Hg
removal, due to the slow catalytic oxidation rate at low temperature. This work preliminarily established the relation between the structure of rare earth manganese perovskite and Hg
removal performance.</description><subject>Air Pollutants</subject><subject>Calcium Compounds</subject><subject>Coal</subject><subject>Mercury</subject><subject>Oxides</subject><subject>Temperature</subject><subject>Titanium</subject><issn>1001-0742</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2022</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNqFjbsKwjAUQDMotj4-wEXuLsabNm1xtoqD4uJeKl7F2jQhaSvOfqC_pIPOTgcOBw5jY4FcoIjnBS_I8QADwVFyxKTDfIEoZpjIwGN95wpElBFGPeaFchGHUSB9lqbUUqmNoqoGfYZttav2EE5fTzBkdetu15pAV1DqO9SkPjKvG0uwuQCCJaXbvByy7jkvHY2-HLDJenVYbmamOSo6ZcZeVW4f2W8b_g3eEKw9PA</recordid><startdate>202203</startdate><enddate>202203</enddate><creator>Shen, Qicheng</creator><creator>Zhou, Jiacheng</creator><creator>Ma, Chenglong</creator><creator>Yang, Jie</creator><creator>Cao, Limei</creator><creator>Yang, Ji</creator><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope></search><sort><creationdate>202203</creationdate><title>Development of LnMnO 3+σ perovskite on low temperature Hg 0 removal</title><author>Shen, Qicheng ; Zhou, Jiacheng ; Ma, Chenglong ; Yang, Jie ; Cao, Limei ; Yang, Ji</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-pubmed_primary_349635243</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2022</creationdate><topic>Air Pollutants</topic><topic>Calcium Compounds</topic><topic>Coal</topic><topic>Mercury</topic><topic>Oxides</topic><topic>Temperature</topic><topic>Titanium</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Shen, Qicheng</creatorcontrib><creatorcontrib>Zhou, Jiacheng</creatorcontrib><creatorcontrib>Ma, Chenglong</creatorcontrib><creatorcontrib>Yang, Jie</creatorcontrib><creatorcontrib>Cao, Limei</creatorcontrib><creatorcontrib>Yang, Ji</creatorcontrib><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><jtitle>Journal of environmental sciences (China)</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Shen, Qicheng</au><au>Zhou, Jiacheng</au><au>Ma, Chenglong</au><au>Yang, Jie</au><au>Cao, Limei</au><au>Yang, Ji</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Development of LnMnO 3+σ perovskite on low temperature Hg 0 removal</atitle><jtitle>Journal of environmental sciences (China)</jtitle><addtitle>J Environ Sci (China)</addtitle><date>2022-03</date><risdate>2022</risdate><volume>113</volume><spage>141</spage><pages>141-</pages><issn>1001-0742</issn><abstract>LnMnO
(Ln = La, Pr, Nd, Sm, Eu, Gd or Dy) perovskites synthesized by sol-gel method were employed for gaseous elemental mercury (Hg
) removal from coal-fired flue gas. Characterization results revealed the structure of the perovskites presented a phase transition process from rhombohedral system to O- and O'-orthorhombic structure with the change of A-site rare earth elements. The perovskites showed satisfactory Hg
removal capacity in a narrow temperature range of 100-150°C. NdMnO
with an O-O' orthorhombic structure presented the best Hg
removal performance, which markedly depends on four factors: crystal structure, oxygen vacancy density, Mn
/Mn
ratio and surface element segregation. The Hg
removal mechanism was illustrated based on the mercury temperature programmed desorption experiment and X-ray photoelectron spectroscopy characterization. Both chemisorption and catalytic oxidation played a role in the Hg
removal process. Chemisorption dominated the Hg
removal, due to the slow catalytic oxidation rate at low temperature. This work preliminarily established the relation between the structure of rare earth manganese perovskite and Hg
removal performance.</abstract><cop>Netherlands</cop><pmid>34963524</pmid><doi>10.1016/j.jes.2021.04.007</doi></addata></record> |
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| ispartof | Journal of environmental sciences (China), 2022-03, Vol.113, p.141 |
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| language | eng |
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| source | MEDLINE; Elsevier ScienceDirect Journals; Alma/SFX Local Collection |
| subjects | Air Pollutants Calcium Compounds Coal Mercury Oxides Temperature Titanium |
| title | Development of LnMnO 3+σ perovskite on low temperature Hg 0 removal |
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