Effect of the oxidation-induced fragmentation of primary particles on soot oxidation reactivity
Experiments were performed on a CH4 lean premixed flame to better understand the effect of the oxidation-induced fragmentation of primary particles on soot oxidation reactivity. An aerosol generator was used to homogeneously disperse diesel soot into the flame. Because minimal soot was formed in thi...
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| Veröffentlicht in: | Combustion and flame 2022-06, Vol.240, p.112026, Article 112026 |
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| container_title | Combustion and flame |
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| creator | Liu, Ye Zhang, Xuyang Lyu, Gang Qiao, Yuehan Zhang, Wei Song, Chonglin |
| description | Experiments were performed on a CH4 lean premixed flame to better understand the effect of the oxidation-induced fragmentation of primary particles on soot oxidation reactivity. An aerosol generator was used to homogeneously disperse diesel soot into the flame. Because minimal soot was formed in this flame itself, the information about diesel soot fragmentation was readily obtained. The thermophoretic and probe sampling techniques were used to obtain soot particles at various heights above the burner. The particle size distribution, oxidation reactivity, nanostructure and carbon chemical state of each sample were characterized. The soot reactivity was evaluated in terms of activation energy. The results indicate a higher extent of aggregate fragmentation occurs at moderate soot burnout percentages and that the internal structure in soot is not destroyed during aggregate fragmentation. At higher soot burnout percentages, the internal burning produces more primary particle fragmentation, so that the soot particles exhibit an increase in fringe tortuosity and decreases in fringe length and sp2/sp3 hybridization ratio. These variations in physicochemical properties increase the oxidation reactivity of the soot particles. |
| doi_str_mv | 10.1016/j.combustflame.2022.112026 |
| format | Article |
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An aerosol generator was used to homogeneously disperse diesel soot into the flame. Because minimal soot was formed in this flame itself, the information about diesel soot fragmentation was readily obtained. The thermophoretic and probe sampling techniques were used to obtain soot particles at various heights above the burner. The particle size distribution, oxidation reactivity, nanostructure and carbon chemical state of each sample were characterized. The soot reactivity was evaluated in terms of activation energy. The results indicate a higher extent of aggregate fragmentation occurs at moderate soot burnout percentages and that the internal structure in soot is not destroyed during aggregate fragmentation. At higher soot burnout percentages, the internal burning produces more primary particle fragmentation, so that the soot particles exhibit an increase in fringe tortuosity and decreases in fringe length and sp2/sp3 hybridization ratio. These variations in physicochemical properties increase the oxidation reactivity of the soot particles.</description><identifier>ISSN: 0010-2180</identifier><identifier>EISSN: 1556-2921</identifier><identifier>DOI: 10.1016/j.combustflame.2022.112026</identifier><language>eng</language><publisher>New York: Elsevier Inc</publisher><subject>Fragmentation ; Oxidation ; Oxidation reactivity ; Particle size distribution ; Premixed flames ; Primary particle ; Reactivity ; Sampling methods ; Soot ; Soot oxidation ; Soot property ; Tortuosity</subject><ispartof>Combustion and flame, 2022-06, Vol.240, p.112026, Article 112026</ispartof><rights>2022 The Combustion Institute</rights><rights>Copyright Elsevier BV Jun 2022</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c352t-db51ce4d3b78210645bc0a2b5e44e245cae31a1c5767137c5cfccb101259c09c3</citedby><cites>FETCH-LOGICAL-c352t-db51ce4d3b78210645bc0a2b5e44e245cae31a1c5767137c5cfccb101259c09c3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://dx.doi.org/10.1016/j.combustflame.2022.112026$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,780,784,3550,27924,27925,45995</link.rule.ids></links><search><creatorcontrib>Liu, Ye</creatorcontrib><creatorcontrib>Zhang, Xuyang</creatorcontrib><creatorcontrib>Lyu, Gang</creatorcontrib><creatorcontrib>Qiao, Yuehan</creatorcontrib><creatorcontrib>Zhang, Wei</creatorcontrib><creatorcontrib>Song, Chonglin</creatorcontrib><title>Effect of the oxidation-induced fragmentation of primary particles on soot oxidation reactivity</title><title>Combustion and flame</title><description>Experiments were performed on a CH4 lean premixed flame to better understand the effect of the oxidation-induced fragmentation of primary particles on soot oxidation reactivity. An aerosol generator was used to homogeneously disperse diesel soot into the flame. Because minimal soot was formed in this flame itself, the information about diesel soot fragmentation was readily obtained. The thermophoretic and probe sampling techniques were used to obtain soot particles at various heights above the burner. The particle size distribution, oxidation reactivity, nanostructure and carbon chemical state of each sample were characterized. The soot reactivity was evaluated in terms of activation energy. The results indicate a higher extent of aggregate fragmentation occurs at moderate soot burnout percentages and that the internal structure in soot is not destroyed during aggregate fragmentation. At higher soot burnout percentages, the internal burning produces more primary particle fragmentation, so that the soot particles exhibit an increase in fringe tortuosity and decreases in fringe length and sp2/sp3 hybridization ratio. These variations in physicochemical properties increase the oxidation reactivity of the soot particles.</description><subject>Fragmentation</subject><subject>Oxidation</subject><subject>Oxidation reactivity</subject><subject>Particle size distribution</subject><subject>Premixed flames</subject><subject>Primary particle</subject><subject>Reactivity</subject><subject>Sampling methods</subject><subject>Soot</subject><subject>Soot oxidation</subject><subject>Soot property</subject><subject>Tortuosity</subject><issn>0010-2180</issn><issn>1556-2921</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2022</creationdate><recordtype>article</recordtype><recordid>eNqNkEtPwzAQhC0EEqXwHyI4J_gRJy03VMpDQuICZ8vZbMBRExfbqei_xyGV4MhppdHMrOYj5JLRjFFWXLcZ2K4afGg2usOMU84zxuIpjsiMSVmkfMnZMZlRymjK2YKekjPvW0ppmQsxI2rdNAghsU0SPjCxX6bWwdg-NX09ANZJ4_R7h334UUfb1plOu32y1S4Y2KBPou6tDb_hxKGGYHYm7M_JSaM3Hi8Od07e7tevq8f0-eXhaXX7nIKQPKR1JRlgXouqXHBGi1xWQDWvJOY58lyCRsE0A1kWJRMlSGgAqoiAyyXQJYg5uZp6t85-DuiDau3g-vhS8aIUxYhkGV03kwuc9d5how5rFKNqBKpa9ReoGoGqCWgM301hjDt2Bp3yYLCPkIyLCFVtzX9qvgEQD4dD</recordid><startdate>202206</startdate><enddate>202206</enddate><creator>Liu, Ye</creator><creator>Zhang, Xuyang</creator><creator>Lyu, Gang</creator><creator>Qiao, Yuehan</creator><creator>Zhang, Wei</creator><creator>Song, Chonglin</creator><general>Elsevier Inc</general><general>Elsevier BV</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7TB</scope><scope>8FD</scope><scope>FR3</scope><scope>H8D</scope><scope>L7M</scope></search><sort><creationdate>202206</creationdate><title>Effect of the oxidation-induced fragmentation of primary particles on soot oxidation reactivity</title><author>Liu, Ye ; Zhang, Xuyang ; Lyu, Gang ; Qiao, Yuehan ; Zhang, Wei ; Song, Chonglin</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c352t-db51ce4d3b78210645bc0a2b5e44e245cae31a1c5767137c5cfccb101259c09c3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2022</creationdate><topic>Fragmentation</topic><topic>Oxidation</topic><topic>Oxidation reactivity</topic><topic>Particle size distribution</topic><topic>Premixed flames</topic><topic>Primary particle</topic><topic>Reactivity</topic><topic>Sampling methods</topic><topic>Soot</topic><topic>Soot oxidation</topic><topic>Soot property</topic><topic>Tortuosity</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Liu, Ye</creatorcontrib><creatorcontrib>Zhang, Xuyang</creatorcontrib><creatorcontrib>Lyu, Gang</creatorcontrib><creatorcontrib>Qiao, Yuehan</creatorcontrib><creatorcontrib>Zhang, Wei</creatorcontrib><creatorcontrib>Song, Chonglin</creatorcontrib><collection>CrossRef</collection><collection>Mechanical & Transportation Engineering Abstracts</collection><collection>Technology Research Database</collection><collection>Engineering Research Database</collection><collection>Aerospace Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Combustion and flame</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Liu, Ye</au><au>Zhang, Xuyang</au><au>Lyu, Gang</au><au>Qiao, Yuehan</au><au>Zhang, Wei</au><au>Song, Chonglin</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Effect of the oxidation-induced fragmentation of primary particles on soot oxidation reactivity</atitle><jtitle>Combustion and flame</jtitle><date>2022-06</date><risdate>2022</risdate><volume>240</volume><spage>112026</spage><pages>112026-</pages><artnum>112026</artnum><issn>0010-2180</issn><eissn>1556-2921</eissn><abstract>Experiments were performed on a CH4 lean premixed flame to better understand the effect of the oxidation-induced fragmentation of primary particles on soot oxidation reactivity. An aerosol generator was used to homogeneously disperse diesel soot into the flame. Because minimal soot was formed in this flame itself, the information about diesel soot fragmentation was readily obtained. The thermophoretic and probe sampling techniques were used to obtain soot particles at various heights above the burner. The particle size distribution, oxidation reactivity, nanostructure and carbon chemical state of each sample were characterized. The soot reactivity was evaluated in terms of activation energy. The results indicate a higher extent of aggregate fragmentation occurs at moderate soot burnout percentages and that the internal structure in soot is not destroyed during aggregate fragmentation. At higher soot burnout percentages, the internal burning produces more primary particle fragmentation, so that the soot particles exhibit an increase in fringe tortuosity and decreases in fringe length and sp2/sp3 hybridization ratio. These variations in physicochemical properties increase the oxidation reactivity of the soot particles.</abstract><cop>New York</cop><pub>Elsevier Inc</pub><doi>10.1016/j.combustflame.2022.112026</doi></addata></record> |
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| source | Access via ScienceDirect (Elsevier) |
| subjects | Fragmentation Oxidation Oxidation reactivity Particle size distribution Premixed flames Primary particle Reactivity Sampling methods Soot Soot oxidation Soot property Tortuosity |
| title | Effect of the oxidation-induced fragmentation of primary particles on soot oxidation reactivity |
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