Mechanistic Study on Demulsification of Water-in-Diluted Bitumen Emulsions by Ethylcellulose
In our previous study, ethylcellulose (EC), an effective, nontoxic, and biodegradable natural polymer, was found effective in dewatering water-in-diluted bitumen emulsions. In this study, the demulsification mechanism of water-in-diluted bitumen emulsions by EC is investigated. In situ experiments u...
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| Veröffentlicht in: | Langmuir 2010-03, Vol.26 (5), p.3050-3057 |
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| creator | Feng, Xianhua Mussone, Paolo Gao, Song Wang, Shengqun Wu, Shiau-Yin Masliyah, Jacob H Xu, Zhenghe |
| description | In our previous study, ethylcellulose (EC), an effective, nontoxic, and biodegradable natural polymer, was found effective in dewatering water-in-diluted bitumen emulsions. In this study, the demulsification mechanism of water-in-diluted bitumen emulsions by EC is investigated. In situ experiments using a micropipet apparatus provided direct evidence on both flocculation and coalescence of water droplets in diluted bitumen by EC. The addition of EC was found to decrease naphtha-diluted bitumen−water interfacial tension significantly. At the molecular level, AFM imaging revealed disruption of the continuous interfacial films formed from surface-active components of bitumen by EC. Our study clearly indicates that the demulsification by EC is through both flocculation and coalescence of water droplets, attained by competitive adsorption of EC at the oil−water interface and disruption of the original protective interfacial films formed from the surface-active components of bitumen. |
| doi_str_mv | 10.1021/la9029563 |
| format | Article |
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In this study, the demulsification mechanism of water-in-diluted bitumen emulsions by EC is investigated. In situ experiments using a micropipet apparatus provided direct evidence on both flocculation and coalescence of water droplets in diluted bitumen by EC. The addition of EC was found to decrease naphtha-diluted bitumen−water interfacial tension significantly. At the molecular level, AFM imaging revealed disruption of the continuous interfacial films formed from surface-active components of bitumen by EC. Our study clearly indicates that the demulsification by EC is through both flocculation and coalescence of water droplets, attained by competitive adsorption of EC at the oil−water interface and disruption of the original protective interfacial films formed from the surface-active components of bitumen.</description><identifier>ISSN: 0743-7463</identifier><identifier>EISSN: 1520-5827</identifier><identifier>DOI: 10.1021/la9029563</identifier><identifier>PMID: 20175568</identifier><identifier>CODEN: LANGD5</identifier><language>eng</language><publisher>Washington, DC: American Chemical Society</publisher><subject>Cellulose - analogs & derivatives ; Cellulose - chemistry ; Chemistry ; Colloidal state and disperse state ; Colloids: Surfactants and Self-Assembly, Dispersions, Emulsions, Foams ; Emulsions ; Emulsions. Microemulsions. Foams ; Exact sciences and technology ; General and physical chemistry ; Hydrocarbons - chemistry ; Mechanical Phenomena ; Microscopy, Atomic Force ; Surface physical chemistry ; Water - chemistry</subject><ispartof>Langmuir, 2010-03, Vol.26 (5), p.3050-3057</ispartof><rights>Copyright © 2009 American Chemical Society</rights><rights>2015 INIST-CNRS</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-a410t-42dad423d9ea5e3413b56775e4c557d0a0993739368c3e5077127e492f2d6e943</citedby><cites>FETCH-LOGICAL-a410t-42dad423d9ea5e3413b56775e4c557d0a0993739368c3e5077127e492f2d6e943</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://pubs.acs.org/doi/pdf/10.1021/la9029563$$EPDF$$P50$$Gacs$$H</linktopdf><linktohtml>$$Uhttps://pubs.acs.org/doi/10.1021/la9029563$$EHTML$$P50$$Gacs$$H</linktohtml><link.rule.ids>314,780,784,2765,27076,27924,27925,56738,56788</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=22540901$$DView record in Pascal Francis$$Hfree_for_read</backlink><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/20175568$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Feng, Xianhua</creatorcontrib><creatorcontrib>Mussone, Paolo</creatorcontrib><creatorcontrib>Gao, Song</creatorcontrib><creatorcontrib>Wang, Shengqun</creatorcontrib><creatorcontrib>Wu, Shiau-Yin</creatorcontrib><creatorcontrib>Masliyah, Jacob H</creatorcontrib><creatorcontrib>Xu, Zhenghe</creatorcontrib><title>Mechanistic Study on Demulsification of Water-in-Diluted Bitumen Emulsions by Ethylcellulose</title><title>Langmuir</title><addtitle>Langmuir</addtitle><description>In our previous study, ethylcellulose (EC), an effective, nontoxic, and biodegradable natural polymer, was found effective in dewatering water-in-diluted bitumen emulsions. In this study, the demulsification mechanism of water-in-diluted bitumen emulsions by EC is investigated. In situ experiments using a micropipet apparatus provided direct evidence on both flocculation and coalescence of water droplets in diluted bitumen by EC. The addition of EC was found to decrease naphtha-diluted bitumen−water interfacial tension significantly. At the molecular level, AFM imaging revealed disruption of the continuous interfacial films formed from surface-active components of bitumen by EC. Our study clearly indicates that the demulsification by EC is through both flocculation and coalescence of water droplets, attained by competitive adsorption of EC at the oil−water interface and disruption of the original protective interfacial films formed from the surface-active components of bitumen.</description><subject>Cellulose - analogs & derivatives</subject><subject>Cellulose - chemistry</subject><subject>Chemistry</subject><subject>Colloidal state and disperse state</subject><subject>Colloids: Surfactants and Self-Assembly, Dispersions, Emulsions, Foams</subject><subject>Emulsions</subject><subject>Emulsions. Microemulsions. Foams</subject><subject>Exact sciences and technology</subject><subject>General and physical chemistry</subject><subject>Hydrocarbons - chemistry</subject><subject>Mechanical Phenomena</subject><subject>Microscopy, Atomic Force</subject><subject>Surface physical chemistry</subject><subject>Water - chemistry</subject><issn>0743-7463</issn><issn>1520-5827</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2010</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNpt0E1LxDAQBuAgiq4fB_-A9CLioTr5ajZHXdcPUDyoeBFKNp1ilrRdm-Sw_96urnrxNAw8vDO8hBxSOKPA6Lk3GpiWBd8gIyoZ5HLM1CYZgRI8V6LgO2Q3hDkAaC70NtlhQJWUxXhE3h7QvpvWhehs9hRTtcy6NrvCJvngamdNdMPe1dmridjnrs2vnE8Rq-zSxdRgm02_aNeGbLbMpvF96S16n3wXcJ9s1cYHPFjPPfJyPX2e3Ob3jzd3k4v73AgKMResMpVgvNJoJHJB-UwWSkkUVkpVgQGtueKaF2PLUYJSlCkUmtWsKlALvkdOvnMXffeRMMSycWH1hWmxS6FUnFPgUqlBnn5L23ch9FiXi941pl-WFMpVl-Vvl4M9WqemWYPVr_wpbwDHa2CCNb7uTWtd-HNMCtBA_5yxoZx3qW-HMv45-Aly24Z_</recordid><startdate>20100302</startdate><enddate>20100302</enddate><creator>Feng, Xianhua</creator><creator>Mussone, Paolo</creator><creator>Gao, Song</creator><creator>Wang, Shengqun</creator><creator>Wu, Shiau-Yin</creator><creator>Masliyah, Jacob H</creator><creator>Xu, Zhenghe</creator><general>American Chemical Society</general><scope>IQODW</scope><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7X8</scope></search><sort><creationdate>20100302</creationdate><title>Mechanistic Study on Demulsification of Water-in-Diluted Bitumen Emulsions by Ethylcellulose</title><author>Feng, Xianhua ; Mussone, Paolo ; Gao, Song ; Wang, Shengqun ; Wu, Shiau-Yin ; Masliyah, Jacob H ; Xu, Zhenghe</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-a410t-42dad423d9ea5e3413b56775e4c557d0a0993739368c3e5077127e492f2d6e943</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2010</creationdate><topic>Cellulose - analogs & derivatives</topic><topic>Cellulose - chemistry</topic><topic>Chemistry</topic><topic>Colloidal state and disperse state</topic><topic>Colloids: Surfactants and Self-Assembly, Dispersions, Emulsions, Foams</topic><topic>Emulsions</topic><topic>Emulsions. Microemulsions. Foams</topic><topic>Exact sciences and technology</topic><topic>General and physical chemistry</topic><topic>Hydrocarbons - chemistry</topic><topic>Mechanical Phenomena</topic><topic>Microscopy, Atomic Force</topic><topic>Surface physical chemistry</topic><topic>Water - chemistry</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Feng, Xianhua</creatorcontrib><creatorcontrib>Mussone, Paolo</creatorcontrib><creatorcontrib>Gao, Song</creatorcontrib><creatorcontrib>Wang, Shengqun</creatorcontrib><creatorcontrib>Wu, Shiau-Yin</creatorcontrib><creatorcontrib>Masliyah, Jacob H</creatorcontrib><creatorcontrib>Xu, Zhenghe</creatorcontrib><collection>Pascal-Francis</collection><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>MEDLINE - Academic</collection><jtitle>Langmuir</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Feng, Xianhua</au><au>Mussone, Paolo</au><au>Gao, Song</au><au>Wang, Shengqun</au><au>Wu, Shiau-Yin</au><au>Masliyah, Jacob H</au><au>Xu, Zhenghe</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Mechanistic Study on Demulsification of Water-in-Diluted Bitumen Emulsions by Ethylcellulose</atitle><jtitle>Langmuir</jtitle><addtitle>Langmuir</addtitle><date>2010-03-02</date><risdate>2010</risdate><volume>26</volume><issue>5</issue><spage>3050</spage><epage>3057</epage><pages>3050-3057</pages><issn>0743-7463</issn><eissn>1520-5827</eissn><coden>LANGD5</coden><abstract>In our previous study, ethylcellulose (EC), an effective, nontoxic, and biodegradable natural polymer, was found effective in dewatering water-in-diluted bitumen emulsions. In this study, the demulsification mechanism of water-in-diluted bitumen emulsions by EC is investigated. In situ experiments using a micropipet apparatus provided direct evidence on both flocculation and coalescence of water droplets in diluted bitumen by EC. The addition of EC was found to decrease naphtha-diluted bitumen−water interfacial tension significantly. At the molecular level, AFM imaging revealed disruption of the continuous interfacial films formed from surface-active components of bitumen by EC. Our study clearly indicates that the demulsification by EC is through both flocculation and coalescence of water droplets, attained by competitive adsorption of EC at the oil−water interface and disruption of the original protective interfacial films formed from the surface-active components of bitumen.</abstract><cop>Washington, DC</cop><pub>American Chemical Society</pub><pmid>20175568</pmid><doi>10.1021/la9029563</doi><tpages>8</tpages></addata></record> |
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| subjects | Cellulose - analogs & derivatives Cellulose - chemistry Chemistry Colloidal state and disperse state Colloids: Surfactants and Self-Assembly, Dispersions, Emulsions, Foams Emulsions Emulsions. Microemulsions. Foams Exact sciences and technology General and physical chemistry Hydrocarbons - chemistry Mechanical Phenomena Microscopy, Atomic Force Surface physical chemistry Water - chemistry |
| title | Mechanistic Study on Demulsification of Water-in-Diluted Bitumen Emulsions by Ethylcellulose |
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