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Experimental and DFT research on role of sodium in NO reduction on char surface under H2O/Ar atmosphere
•NO reduction characteristics on char surface in H2O differ from those in Ar.•Evolution pathways of NO reduction and CO release on char surface are studied by DFT.•The catalysis of Na intensifies the competition between the formation of CO and CO2.•Promotion ways of H2O atmosphere for NO reduction a...
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Published in: | Fuel (Guildford) 2021-10, Vol.302, p.121105, Article 121105 |
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creator | Chen, Yi-Feng Su, Sheng Zhang, Chun-Xiu Wang, Zhong-Hui Xie, Yu-Xian Zhang, Hao Qing, Meng-Xia Wang, Yi Hu, Song Zhang, Zhong-Xiao Xiang, Jun |
description | •NO reduction characteristics on char surface in H2O differ from those in Ar.•Evolution pathways of NO reduction and CO release on char surface are studied by DFT.•The catalysis of Na intensifies the competition between the formation of CO and CO2.•Promotion ways of H2O atmosphere for NO reduction are elucidated at the molecular level.•The formation of H-C-O-Na groups is an important part of Na catalysis mechanism.
The catalytic mechanism of Na during NO reduction on char surface is proposed to provide fundamental information for minimizing NOx emissions. A molecular modeling study was carried out using density functional theory to clarify the NO reduction and CO release pathways on char surface. The calculation results explain the promotion phenomenon caused by Na catalysis, and the fluctuation of the CO release curve in the experiment. Under H2O/Ar atmosphere, besides the NO-char heterogeneous reaction, simultaneous occurrence of the NO homogeneous reaction with lower energy barrier improved the NO reduction rate. According to the simulation results, the catalytic effect of Na is manifested in that it can weaken the conjugated components of the aromatics structure, and form a stable H-C-O-Na structure to weaken the connected C–C bond, thereby facilitating the CO release. Mayer bond order and RDG analyses indicate that the participation of Na can prevent the C-O bond from being stretched, and generate the strong attractive interaction to promote the NO reduction. |
doi_str_mv | 10.1016/j.fuel.2021.121105 |
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The catalytic mechanism of Na during NO reduction on char surface is proposed to provide fundamental information for minimizing NOx emissions. A molecular modeling study was carried out using density functional theory to clarify the NO reduction and CO release pathways on char surface. The calculation results explain the promotion phenomenon caused by Na catalysis, and the fluctuation of the CO release curve in the experiment. Under H2O/Ar atmosphere, besides the NO-char heterogeneous reaction, simultaneous occurrence of the NO homogeneous reaction with lower energy barrier improved the NO reduction rate. According to the simulation results, the catalytic effect of Na is manifested in that it can weaken the conjugated components of the aromatics structure, and form a stable H-C-O-Na structure to weaken the connected C–C bond, thereby facilitating the CO release. Mayer bond order and RDG analyses indicate that the participation of Na can prevent the C-O bond from being stretched, and generate the strong attractive interaction to promote the NO reduction.</description><identifier>ISSN: 0016-2361</identifier><identifier>EISSN: 1873-7153</identifier><identifier>DOI: 10.1016/j.fuel.2021.121105</identifier><language>eng</language><publisher>Kidlington: Elsevier Ltd</publisher><subject>Aromatic compounds ; Atmosphere ; Atmospheric models ; Carbon monoxide ; Catalysis ; Char ; CO release ; Covalent bonds ; Density functional theory ; Molecular modelling ; NO reduction ; Reduction ; Sodium</subject><ispartof>Fuel (Guildford), 2021-10, Vol.302, p.121105, Article 121105</ispartof><rights>2021 Elsevier Ltd</rights><rights>Copyright Elsevier BV Oct 15, 2021</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c328t-c2bd7edf0dc78d629d6f13b015e844e35fc3a69aa7ac48dbf7f23289971f30ec3</citedby><cites>FETCH-LOGICAL-c328t-c2bd7edf0dc78d629d6f13b015e844e35fc3a69aa7ac48dbf7f23289971f30ec3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>315,786,790,27957,27958</link.rule.ids></links><search><creatorcontrib>Chen, Yi-Feng</creatorcontrib><creatorcontrib>Su, Sheng</creatorcontrib><creatorcontrib>Zhang, Chun-Xiu</creatorcontrib><creatorcontrib>Wang, Zhong-Hui</creatorcontrib><creatorcontrib>Xie, Yu-Xian</creatorcontrib><creatorcontrib>Zhang, Hao</creatorcontrib><creatorcontrib>Qing, Meng-Xia</creatorcontrib><creatorcontrib>Wang, Yi</creatorcontrib><creatorcontrib>Hu, Song</creatorcontrib><creatorcontrib>Zhang, Zhong-Xiao</creatorcontrib><creatorcontrib>Xiang, Jun</creatorcontrib><title>Experimental and DFT research on role of sodium in NO reduction on char surface under H2O/Ar atmosphere</title><title>Fuel (Guildford)</title><description>•NO reduction characteristics on char surface in H2O differ from those in Ar.•Evolution pathways of NO reduction and CO release on char surface are studied by DFT.•The catalysis of Na intensifies the competition between the formation of CO and CO2.•Promotion ways of H2O atmosphere for NO reduction are elucidated at the molecular level.•The formation of H-C-O-Na groups is an important part of Na catalysis mechanism.
The catalytic mechanism of Na during NO reduction on char surface is proposed to provide fundamental information for minimizing NOx emissions. A molecular modeling study was carried out using density functional theory to clarify the NO reduction and CO release pathways on char surface. The calculation results explain the promotion phenomenon caused by Na catalysis, and the fluctuation of the CO release curve in the experiment. Under H2O/Ar atmosphere, besides the NO-char heterogeneous reaction, simultaneous occurrence of the NO homogeneous reaction with lower energy barrier improved the NO reduction rate. According to the simulation results, the catalytic effect of Na is manifested in that it can weaken the conjugated components of the aromatics structure, and form a stable H-C-O-Na structure to weaken the connected C–C bond, thereby facilitating the CO release. Mayer bond order and RDG analyses indicate that the participation of Na can prevent the C-O bond from being stretched, and generate the strong attractive interaction to promote the NO reduction.</description><subject>Aromatic compounds</subject><subject>Atmosphere</subject><subject>Atmospheric models</subject><subject>Carbon monoxide</subject><subject>Catalysis</subject><subject>Char</subject><subject>CO release</subject><subject>Covalent bonds</subject><subject>Density functional theory</subject><subject>Molecular modelling</subject><subject>NO reduction</subject><subject>Reduction</subject><subject>Sodium</subject><issn>0016-2361</issn><issn>1873-7153</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2021</creationdate><recordtype>article</recordtype><recordid>eNp9kE1LAzEQhoMoWKt_wFPA827zsZ_gpVRrhWIv9RzSZGKzbDdrsiv6701Zz8LAHOZ9ZoYHoXtKUkposWhSM0KbMsJoShmlJL9AM1qVPClpzi_RjMRUwnhBr9FNCA0hpKzybIY-nr978PYE3SBbLDuNn9Z77CGA9OqIXYe9awE7g4PTdjxh2-G3XQzoUQ02jmOpo_Q4jN5IBXjsNHi8YbvF0mM5nFzoj-DhFl0Z2Qa4--tz9L5-3q82yXb38rpabhPFWTUkih10CdoQrcpKF6zWhaH8QGgOVZYBz43isqilLKXKKn0wpWERrOuSGk5A8Tl6mPb23n2OEAbRuNF38aRgeRHFZFlRxBSbUsq7EDwY0UcH0v8ISsRZqGjEWag4CxWT0Ag9ThDE_78seBGUhU6Bth7UILSz_-G_YZB-gQ</recordid><startdate>20211015</startdate><enddate>20211015</enddate><creator>Chen, Yi-Feng</creator><creator>Su, Sheng</creator><creator>Zhang, Chun-Xiu</creator><creator>Wang, Zhong-Hui</creator><creator>Xie, Yu-Xian</creator><creator>Zhang, Hao</creator><creator>Qing, Meng-Xia</creator><creator>Wang, Yi</creator><creator>Hu, Song</creator><creator>Zhang, Zhong-Xiao</creator><creator>Xiang, Jun</creator><general>Elsevier Ltd</general><general>Elsevier BV</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7QF</scope><scope>7QO</scope><scope>7QQ</scope><scope>7SC</scope><scope>7SE</scope><scope>7SP</scope><scope>7SR</scope><scope>7T7</scope><scope>7TA</scope><scope>7TB</scope><scope>7U5</scope><scope>8BQ</scope><scope>8FD</scope><scope>C1K</scope><scope>F28</scope><scope>FR3</scope><scope>H8D</scope><scope>H8G</scope><scope>JG9</scope><scope>JQ2</scope><scope>KR7</scope><scope>L7M</scope><scope>L~C</scope><scope>L~D</scope><scope>P64</scope></search><sort><creationdate>20211015</creationdate><title>Experimental and DFT research on role of sodium in NO reduction on char surface under H2O/Ar atmosphere</title><author>Chen, Yi-Feng ; Su, Sheng ; Zhang, Chun-Xiu ; Wang, Zhong-Hui ; Xie, Yu-Xian ; Zhang, Hao ; Qing, Meng-Xia ; Wang, Yi ; Hu, Song ; Zhang, Zhong-Xiao ; Xiang, Jun</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c328t-c2bd7edf0dc78d629d6f13b015e844e35fc3a69aa7ac48dbf7f23289971f30ec3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2021</creationdate><topic>Aromatic compounds</topic><topic>Atmosphere</topic><topic>Atmospheric models</topic><topic>Carbon monoxide</topic><topic>Catalysis</topic><topic>Char</topic><topic>CO release</topic><topic>Covalent bonds</topic><topic>Density functional theory</topic><topic>Molecular modelling</topic><topic>NO reduction</topic><topic>Reduction</topic><topic>Sodium</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Chen, Yi-Feng</creatorcontrib><creatorcontrib>Su, Sheng</creatorcontrib><creatorcontrib>Zhang, Chun-Xiu</creatorcontrib><creatorcontrib>Wang, Zhong-Hui</creatorcontrib><creatorcontrib>Xie, Yu-Xian</creatorcontrib><creatorcontrib>Zhang, Hao</creatorcontrib><creatorcontrib>Qing, Meng-Xia</creatorcontrib><creatorcontrib>Wang, Yi</creatorcontrib><creatorcontrib>Hu, Song</creatorcontrib><creatorcontrib>Zhang, Zhong-Xiao</creatorcontrib><creatorcontrib>Xiang, Jun</creatorcontrib><collection>CrossRef</collection><collection>Aluminium Industry Abstracts</collection><collection>Biotechnology Research Abstracts</collection><collection>Ceramic Abstracts</collection><collection>Computer and Information Systems Abstracts</collection><collection>Corrosion Abstracts</collection><collection>Electronics & Communications Abstracts</collection><collection>Engineered Materials Abstracts</collection><collection>Industrial and Applied Microbiology Abstracts (Microbiology A)</collection><collection>Materials Business File</collection><collection>Mechanical & Transportation Engineering Abstracts</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Environmental Sciences and Pollution Management</collection><collection>ANTE: Abstracts in New Technology & Engineering</collection><collection>Engineering Research Database</collection><collection>Aerospace Database</collection><collection>Copper Technical Reference Library</collection><collection>Materials Research Database</collection><collection>ProQuest Computer Science Collection</collection><collection>Civil Engineering Abstracts</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>Computer and Information Systems Abstracts Academic</collection><collection>Computer and Information Systems Abstracts Professional</collection><collection>Biotechnology and BioEngineering Abstracts</collection><jtitle>Fuel (Guildford)</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Chen, Yi-Feng</au><au>Su, Sheng</au><au>Zhang, Chun-Xiu</au><au>Wang, Zhong-Hui</au><au>Xie, Yu-Xian</au><au>Zhang, Hao</au><au>Qing, Meng-Xia</au><au>Wang, Yi</au><au>Hu, Song</au><au>Zhang, Zhong-Xiao</au><au>Xiang, Jun</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Experimental and DFT research on role of sodium in NO reduction on char surface under H2O/Ar atmosphere</atitle><jtitle>Fuel (Guildford)</jtitle><date>2021-10-15</date><risdate>2021</risdate><volume>302</volume><spage>121105</spage><pages>121105-</pages><artnum>121105</artnum><issn>0016-2361</issn><eissn>1873-7153</eissn><abstract>•NO reduction characteristics on char surface in H2O differ from those in Ar.•Evolution pathways of NO reduction and CO release on char surface are studied by DFT.•The catalysis of Na intensifies the competition between the formation of CO and CO2.•Promotion ways of H2O atmosphere for NO reduction are elucidated at the molecular level.•The formation of H-C-O-Na groups is an important part of Na catalysis mechanism.
The catalytic mechanism of Na during NO reduction on char surface is proposed to provide fundamental information for minimizing NOx emissions. A molecular modeling study was carried out using density functional theory to clarify the NO reduction and CO release pathways on char surface. The calculation results explain the promotion phenomenon caused by Na catalysis, and the fluctuation of the CO release curve in the experiment. Under H2O/Ar atmosphere, besides the NO-char heterogeneous reaction, simultaneous occurrence of the NO homogeneous reaction with lower energy barrier improved the NO reduction rate. According to the simulation results, the catalytic effect of Na is manifested in that it can weaken the conjugated components of the aromatics structure, and form a stable H-C-O-Na structure to weaken the connected C–C bond, thereby facilitating the CO release. Mayer bond order and RDG analyses indicate that the participation of Na can prevent the C-O bond from being stretched, and generate the strong attractive interaction to promote the NO reduction.</abstract><cop>Kidlington</cop><pub>Elsevier Ltd</pub><doi>10.1016/j.fuel.2021.121105</doi></addata></record> |
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subjects | Aromatic compounds Atmosphere Atmospheric models Carbon monoxide Catalysis Char CO release Covalent bonds Density functional theory Molecular modelling NO reduction Reduction Sodium |
title | Experimental and DFT research on role of sodium in NO reduction on char surface under H2O/Ar atmosphere |
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