Pretreatment of rice hulls by ionic liquid dissolution
► EMIM Ac, HMIM Cl, and AMIM Cl ionic liquid effect on rice hulls. ► EMIM Ac separates out lignin and hemicellulose, leaving cellulose-rich residue. ► Rice hull ash removal correlates with hemicellulose removal. As a highly available waste product, rice hulls could be a starting block in replacing l...
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| Veröffentlicht in: | Bioresource technology 2012-06, Vol.114, p.629-636 |
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| creator | Lynam, Joan G. Toufiq Reza, M. Vasquez, Victor R. Coronella, Charles J. |
| description | ► EMIM Ac, HMIM Cl, and AMIM Cl ionic liquid effect on rice hulls. ► EMIM Ac separates out lignin and hemicellulose, leaving cellulose-rich residue. ► Rice hull ash removal correlates with hemicellulose removal.
As a highly available waste product, rice hulls could be a starting block in replacing liquid fossil fuels. However, their silica covering can make further use difficult. This preliminary study investigates effects of dissolving rice hulls in the ionic liquids 1-ethyl-3-methylimidazolium acetate (EMIM Ac), 1-hexyl-3-methylimidazolium chloride, (HMIM Cl), and 1-allyl-3-methylimidazolium chloride (AMIM Cl), and what lignocellulosic components can be precipitated from the used ionic liquid with water and ethanol. EMIM Ac dissolution at 110°C for 8h was found to completely remove lignin from rice hulls, while ethanol was capable of precipitating lignin out of the used EMIM Ac. With 8h dissolution at 110°C using HMIM Cl, approximately 20% of the cellulose in the rice hull sample can be precipitated out using water as co-solvent, while more than 60% of the hemicellulose can be precipitated with ethanol. |
| doi_str_mv | 10.1016/j.biortech.2012.03.004 |
| format | Article |
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As a highly available waste product, rice hulls could be a starting block in replacing liquid fossil fuels. However, their silica covering can make further use difficult. This preliminary study investigates effects of dissolving rice hulls in the ionic liquids 1-ethyl-3-methylimidazolium acetate (EMIM Ac), 1-hexyl-3-methylimidazolium chloride, (HMIM Cl), and 1-allyl-3-methylimidazolium chloride (AMIM Cl), and what lignocellulosic components can be precipitated from the used ionic liquid with water and ethanol. EMIM Ac dissolution at 110°C for 8h was found to completely remove lignin from rice hulls, while ethanol was capable of precipitating lignin out of the used EMIM Ac. With 8h dissolution at 110°C using HMIM Cl, approximately 20% of the cellulose in the rice hull sample can be precipitated out using water as co-solvent, while more than 60% of the hemicellulose can be precipitated with ethanol.</description><identifier>ISSN: 0960-8524</identifier><identifier>EISSN: 1873-2976</identifier><identifier>DOI: 10.1016/j.biortech.2012.03.004</identifier><identifier>PMID: 22446050</identifier><language>eng</language><publisher>England: Elsevier Ltd</publisher><subject>Cellulose ; Ethanol - metabolism ; Fractional Precipitation - methods ; Hemicellulose ; Ionic Liquids - chemistry ; Lignin ; Oryza - chemistry ; Oryza - microbiology ; Pretreatment ; Rice husks ; Seeds - chemistry ; Seeds - microbiology</subject><ispartof>Bioresource technology, 2012-06, Vol.114, p.629-636</ispartof><rights>2012 Elsevier Ltd</rights><rights>Copyright © 2012 Elsevier Ltd. All rights reserved.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c368t-dc856d2ca7b091b2f7e6ff9e19310cd1992ee1f6622b829ef51d0c7546b8b59d3</citedby><cites>FETCH-LOGICAL-c368t-dc856d2ca7b091b2f7e6ff9e19310cd1992ee1f6622b829ef51d0c7546b8b59d3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://www.sciencedirect.com/science/article/pii/S0960852412004154$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,776,780,3537,27901,27902,65306</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/22446050$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Lynam, Joan G.</creatorcontrib><creatorcontrib>Toufiq Reza, M.</creatorcontrib><creatorcontrib>Vasquez, Victor R.</creatorcontrib><creatorcontrib>Coronella, Charles J.</creatorcontrib><title>Pretreatment of rice hulls by ionic liquid dissolution</title><title>Bioresource technology</title><addtitle>Bioresour Technol</addtitle><description>► EMIM Ac, HMIM Cl, and AMIM Cl ionic liquid effect on rice hulls. ► EMIM Ac separates out lignin and hemicellulose, leaving cellulose-rich residue. ► Rice hull ash removal correlates with hemicellulose removal.
As a highly available waste product, rice hulls could be a starting block in replacing liquid fossil fuels. However, their silica covering can make further use difficult. This preliminary study investigates effects of dissolving rice hulls in the ionic liquids 1-ethyl-3-methylimidazolium acetate (EMIM Ac), 1-hexyl-3-methylimidazolium chloride, (HMIM Cl), and 1-allyl-3-methylimidazolium chloride (AMIM Cl), and what lignocellulosic components can be precipitated from the used ionic liquid with water and ethanol. EMIM Ac dissolution at 110°C for 8h was found to completely remove lignin from rice hulls, while ethanol was capable of precipitating lignin out of the used EMIM Ac. With 8h dissolution at 110°C using HMIM Cl, approximately 20% of the cellulose in the rice hull sample can be precipitated out using water as co-solvent, while more than 60% of the hemicellulose can be precipitated with ethanol.</description><subject>Cellulose</subject><subject>Ethanol - metabolism</subject><subject>Fractional Precipitation - methods</subject><subject>Hemicellulose</subject><subject>Ionic Liquids - chemistry</subject><subject>Lignin</subject><subject>Oryza - chemistry</subject><subject>Oryza - microbiology</subject><subject>Pretreatment</subject><subject>Rice husks</subject><subject>Seeds - chemistry</subject><subject>Seeds - microbiology</subject><issn>0960-8524</issn><issn>1873-2976</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2012</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNqFkMtqwzAQRUVpadK0vxC87MbuSLZla9cS-oJAu2jXwpJGRMGOE8ku5O-rkKTbrgaGc-cyh5A5hYwC5Q_rTLneD6hXGQPKMsgzgOKCTGld5SkTFb8kUxAc0rpkxYTchLAGgJxW7JpMGCsKDiVMCf_0OHhshg43Q9LbxDuNyWps25CofeL6jdNJ63ajM4lxIfTtOMTlLbmyTRvw7jRn5Pvl-Wvxli4_Xt8XT8tU57weUqPrkhumm0qBoIrZCrm1AqnIKWhDhWCI1HLOmKqZQFtSA7oqC65qVQqTz8j98e7W97sRwyA7FzS2bbPBfgwyuqBUxKdERPkR1b4PwaOVW--6xu8jdOC4XMuzM3lwJiGX0VkMzk8do-rQ_MXOkiLweAQwfvrj0MugHW40GudRD9L07r-OX77SgF8</recordid><startdate>201206</startdate><enddate>201206</enddate><creator>Lynam, Joan G.</creator><creator>Toufiq Reza, M.</creator><creator>Vasquez, Victor R.</creator><creator>Coronella, Charles J.</creator><general>Elsevier Ltd</general><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>201206</creationdate><title>Pretreatment of rice hulls by ionic liquid dissolution</title><author>Lynam, Joan G. ; Toufiq Reza, M. ; Vasquez, Victor R. ; Coronella, Charles J.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c368t-dc856d2ca7b091b2f7e6ff9e19310cd1992ee1f6622b829ef51d0c7546b8b59d3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2012</creationdate><topic>Cellulose</topic><topic>Ethanol - metabolism</topic><topic>Fractional Precipitation - methods</topic><topic>Hemicellulose</topic><topic>Ionic Liquids - chemistry</topic><topic>Lignin</topic><topic>Oryza - chemistry</topic><topic>Oryza - microbiology</topic><topic>Pretreatment</topic><topic>Rice husks</topic><topic>Seeds - chemistry</topic><topic>Seeds - microbiology</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Lynam, Joan G.</creatorcontrib><creatorcontrib>Toufiq Reza, M.</creatorcontrib><creatorcontrib>Vasquez, Victor R.</creatorcontrib><creatorcontrib>Coronella, Charles J.</creatorcontrib><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>Bioresource technology</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Lynam, Joan G.</au><au>Toufiq Reza, M.</au><au>Vasquez, Victor R.</au><au>Coronella, Charles J.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Pretreatment of rice hulls by ionic liquid dissolution</atitle><jtitle>Bioresource technology</jtitle><addtitle>Bioresour Technol</addtitle><date>2012-06</date><risdate>2012</risdate><volume>114</volume><spage>629</spage><epage>636</epage><pages>629-636</pages><issn>0960-8524</issn><eissn>1873-2976</eissn><abstract>► EMIM Ac, HMIM Cl, and AMIM Cl ionic liquid effect on rice hulls. ► EMIM Ac separates out lignin and hemicellulose, leaving cellulose-rich residue. ► Rice hull ash removal correlates with hemicellulose removal.
As a highly available waste product, rice hulls could be a starting block in replacing liquid fossil fuels. However, their silica covering can make further use difficult. This preliminary study investigates effects of dissolving rice hulls in the ionic liquids 1-ethyl-3-methylimidazolium acetate (EMIM Ac), 1-hexyl-3-methylimidazolium chloride, (HMIM Cl), and 1-allyl-3-methylimidazolium chloride (AMIM Cl), and what lignocellulosic components can be precipitated from the used ionic liquid with water and ethanol. EMIM Ac dissolution at 110°C for 8h was found to completely remove lignin from rice hulls, while ethanol was capable of precipitating lignin out of the used EMIM Ac. With 8h dissolution at 110°C using HMIM Cl, approximately 20% of the cellulose in the rice hull sample can be precipitated out using water as co-solvent, while more than 60% of the hemicellulose can be precipitated with ethanol.</abstract><cop>England</cop><pub>Elsevier Ltd</pub><pmid>22446050</pmid><doi>10.1016/j.biortech.2012.03.004</doi><tpages>8</tpages></addata></record> |
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| source | MEDLINE; Elsevier ScienceDirect Journals |
| subjects | Cellulose Ethanol - metabolism Fractional Precipitation - methods Hemicellulose Ionic Liquids - chemistry Lignin Oryza - chemistry Oryza - microbiology Pretreatment Rice husks Seeds - chemistry Seeds - microbiology |
| title | Pretreatment of rice hulls by ionic liquid dissolution |
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