Hydrothermal pretreatment of switchgrass and corn stover for production of ethanol and carbon microspheres
Pretreatment of biomass is viewed as a critical step to make the cellulose accessible to enzymes and for an adequate yield of fermentable sugars in ethanol production. Recently, hydrothermal pretreatment methods have attracted a great deal of attention because it uses water which is a inherently pre...
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| Veröffentlicht in: | Biomass & bioenergy 2011-02, Vol.35 (2), p.956-968 |
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| creator | Kumar, Sandeep Kothari, Urvi Kong, Lingzhao Lee, Y.Y. Gupta, Ram B. |
| description | Pretreatment of biomass is viewed as a critical step to make the cellulose accessible to enzymes and for an adequate yield of fermentable sugars in ethanol production. Recently, hydrothermal pretreatment methods have attracted a great deal of attention because it uses water which is a inherently present in green biomass, non-toxic, environmentally benign, and inexpensive medium. Hydrothermal pretreatment of switchgrass and corn stover was conducted in a flow through reactor to enhance and optimize the enzymatic digestibility. More than 80% of glucan digestibility was achieved by pretreatment at 190 °C. Addition of a small amount of K2CO3 (0.45–0.9 wt.%) can enhance the pretreatment and allow use of lower temperatures. Switchgrass pretreated at 190 °C only with water had higher internal surface area than that pretreated in the presence of K2CO3, but both the substrates showed similar glucan digestibility. In comparison to switchgrass, corn stover required milder pretreatment conditions. The liquid hydrolyzate generated during pretreatment was converted into carbon microspheres by hydrothermal carbonization, providing a value-added byproduct. The carbonization process was further examined by GC–MS analysis to understand the mechanism of microsphere formation. |
| doi_str_mv | 10.1016/j.biombioe.2010.11.023 |
| format | Article |
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Recently, hydrothermal pretreatment methods have attracted a great deal of attention because it uses water which is a inherently present in green biomass, non-toxic, environmentally benign, and inexpensive medium. Hydrothermal pretreatment of switchgrass and corn stover was conducted in a flow through reactor to enhance and optimize the enzymatic digestibility. More than 80% of glucan digestibility was achieved by pretreatment at 190 °C. Addition of a small amount of K2CO3 (0.45–0.9 wt.%) can enhance the pretreatment and allow use of lower temperatures. Switchgrass pretreated at 190 °C only with water had higher internal surface area than that pretreated in the presence of K2CO3, but both the substrates showed similar glucan digestibility. In comparison to switchgrass, corn stover required milder pretreatment conditions. The liquid hydrolyzate generated during pretreatment was converted into carbon microspheres by hydrothermal carbonization, providing a value-added byproduct. The carbonization process was further examined by GC–MS analysis to understand the mechanism of microsphere formation.</description><identifier>ISSN: 0961-9534</identifier><identifier>EISSN: 1873-2909</identifier><identifier>DOI: 10.1016/j.biombioe.2010.11.023</identifier><language>eng</language><publisher>Kidlington: Elsevier Ltd</publisher><subject>Alcohols: methanol, ethanol, etc ; Alternative fuels. Production and utilization ; Applied sciences ; Benign ; bioreactors ; carbon ; carbon microspheres ; Carbonization ; catalysts ; Corn stover ; Energy ; enzymatic hydrolysis ; ethanol ; ethanol fuels ; Exact sciences and technology ; fermentation ; Fuels ; glucans ; hot water treatment ; Hydrothermal ; lignocellulose ; microspheres ; optimization ; Panicum virgatum ; physical properties ; potassium carbonate ; Pretreatment ; product quality ; soil conditioners ; Subcritical water ; Switchgrass ; water temperature</subject><ispartof>Biomass & bioenergy, 2011-02, Vol.35 (2), p.956-968</ispartof><rights>2010 Elsevier Ltd</rights><rights>2015 INIST-CNRS</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c398t-c8e3f446cd93a066c5931b8afa5251b88d41f8e6a35a6d7c6ffe4a586cde748d3</citedby><cites>FETCH-LOGICAL-c398t-c8e3f446cd93a066c5931b8afa5251b88d41f8e6a35a6d7c6ffe4a586cde748d3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://www.sciencedirect.com/science/article/pii/S0961953410004149$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,776,780,3536,27903,27904,65309</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=23789869$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>Kumar, Sandeep</creatorcontrib><creatorcontrib>Kothari, Urvi</creatorcontrib><creatorcontrib>Kong, Lingzhao</creatorcontrib><creatorcontrib>Lee, Y.Y.</creatorcontrib><creatorcontrib>Gupta, Ram B.</creatorcontrib><title>Hydrothermal pretreatment of switchgrass and corn stover for production of ethanol and carbon microspheres</title><title>Biomass & bioenergy</title><description>Pretreatment of biomass is viewed as a critical step to make the cellulose accessible to enzymes and for an adequate yield of fermentable sugars in ethanol production. Recently, hydrothermal pretreatment methods have attracted a great deal of attention because it uses water which is a inherently present in green biomass, non-toxic, environmentally benign, and inexpensive medium. Hydrothermal pretreatment of switchgrass and corn stover was conducted in a flow through reactor to enhance and optimize the enzymatic digestibility. More than 80% of glucan digestibility was achieved by pretreatment at 190 °C. Addition of a small amount of K2CO3 (0.45–0.9 wt.%) can enhance the pretreatment and allow use of lower temperatures. Switchgrass pretreated at 190 °C only with water had higher internal surface area than that pretreated in the presence of K2CO3, but both the substrates showed similar glucan digestibility. In comparison to switchgrass, corn stover required milder pretreatment conditions. The liquid hydrolyzate generated during pretreatment was converted into carbon microspheres by hydrothermal carbonization, providing a value-added byproduct. The carbonization process was further examined by GC–MS analysis to understand the mechanism of microsphere formation.</description><subject>Alcohols: methanol, ethanol, etc</subject><subject>Alternative fuels. Production and utilization</subject><subject>Applied sciences</subject><subject>Benign</subject><subject>bioreactors</subject><subject>carbon</subject><subject>carbon microspheres</subject><subject>Carbonization</subject><subject>catalysts</subject><subject>Corn stover</subject><subject>Energy</subject><subject>enzymatic hydrolysis</subject><subject>ethanol</subject><subject>ethanol fuels</subject><subject>Exact sciences and technology</subject><subject>fermentation</subject><subject>Fuels</subject><subject>glucans</subject><subject>hot water treatment</subject><subject>Hydrothermal</subject><subject>lignocellulose</subject><subject>microspheres</subject><subject>optimization</subject><subject>Panicum virgatum</subject><subject>physical properties</subject><subject>potassium carbonate</subject><subject>Pretreatment</subject><subject>product quality</subject><subject>soil conditioners</subject><subject>Subcritical water</subject><subject>Switchgrass</subject><subject>water temperature</subject><issn>0961-9534</issn><issn>1873-2909</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2011</creationdate><recordtype>article</recordtype><recordid>eNqFkUFv3CAQhVHVSN0m_QutL1VP3oDBGG6torSJFKmHJGc0C0OWlW22wKbKvy-W0157QKDR9948PQj5yOiWUSYvD9tdiFM9uO3oMmRb2vE3ZMPUwNtOU_2WbKiWrNU9F-_I-5wPlDJBBduQw82LS7HsMU0wNseEJSGUCefSRN_k36HY_VOCnBuYXWNjmptc4jOmxsdU-ehOtoQ4LzSWPcxxXElIuzqdgk0xH6s95gty5mHM-OH1PieP368frm7au58_bq--3bWWa1Vaq5B7IaR1mgOV0vaas50CD33X14dygnmFEngP0g1Weo8CelUFOAjl-Dn5svrWdL9OmIuZQrY4jjBjPGWjeyGZ4IOopFzJJWRO6M0xhQnSi2HULN2ag_nbrVm6NYyZ2m0Vfn5dAdnC6BPMNuR_6o4PSiupK_dp5TxEA0-pMo_31YhTpjtRv6ASX1cCayPPAZPJNuBs0YWEthgXw__C_AFUI58k</recordid><startdate>20110201</startdate><enddate>20110201</enddate><creator>Kumar, Sandeep</creator><creator>Kothari, Urvi</creator><creator>Kong, Lingzhao</creator><creator>Lee, Y.Y.</creator><creator>Gupta, Ram B.</creator><general>Elsevier Ltd</general><general>Elsevier</general><scope>FBQ</scope><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7QO</scope><scope>8FD</scope><scope>FR3</scope><scope>P64</scope></search><sort><creationdate>20110201</creationdate><title>Hydrothermal pretreatment of switchgrass and corn stover for production of ethanol and carbon microspheres</title><author>Kumar, Sandeep ; Kothari, Urvi ; Kong, Lingzhao ; Lee, Y.Y. ; Gupta, Ram B.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c398t-c8e3f446cd93a066c5931b8afa5251b88d41f8e6a35a6d7c6ffe4a586cde748d3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2011</creationdate><topic>Alcohols: methanol, ethanol, etc</topic><topic>Alternative fuels. Production and utilization</topic><topic>Applied sciences</topic><topic>Benign</topic><topic>bioreactors</topic><topic>carbon</topic><topic>carbon microspheres</topic><topic>Carbonization</topic><topic>catalysts</topic><topic>Corn stover</topic><topic>Energy</topic><topic>enzymatic hydrolysis</topic><topic>ethanol</topic><topic>ethanol fuels</topic><topic>Exact sciences and technology</topic><topic>fermentation</topic><topic>Fuels</topic><topic>glucans</topic><topic>hot water treatment</topic><topic>Hydrothermal</topic><topic>lignocellulose</topic><topic>microspheres</topic><topic>optimization</topic><topic>Panicum virgatum</topic><topic>physical properties</topic><topic>potassium carbonate</topic><topic>Pretreatment</topic><topic>product quality</topic><topic>soil conditioners</topic><topic>Subcritical water</topic><topic>Switchgrass</topic><topic>water temperature</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Kumar, Sandeep</creatorcontrib><creatorcontrib>Kothari, Urvi</creatorcontrib><creatorcontrib>Kong, Lingzhao</creatorcontrib><creatorcontrib>Lee, Y.Y.</creatorcontrib><creatorcontrib>Gupta, Ram B.</creatorcontrib><collection>AGRIS</collection><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Biotechnology Research Abstracts</collection><collection>Technology Research Database</collection><collection>Engineering Research Database</collection><collection>Biotechnology and BioEngineering Abstracts</collection><jtitle>Biomass & bioenergy</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Kumar, Sandeep</au><au>Kothari, Urvi</au><au>Kong, Lingzhao</au><au>Lee, Y.Y.</au><au>Gupta, Ram B.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Hydrothermal pretreatment of switchgrass and corn stover for production of ethanol and carbon microspheres</atitle><jtitle>Biomass & bioenergy</jtitle><date>2011-02-01</date><risdate>2011</risdate><volume>35</volume><issue>2</issue><spage>956</spage><epage>968</epage><pages>956-968</pages><issn>0961-9534</issn><eissn>1873-2909</eissn><abstract>Pretreatment of biomass is viewed as a critical step to make the cellulose accessible to enzymes and for an adequate yield of fermentable sugars in ethanol production. Recently, hydrothermal pretreatment methods have attracted a great deal of attention because it uses water which is a inherently present in green biomass, non-toxic, environmentally benign, and inexpensive medium. Hydrothermal pretreatment of switchgrass and corn stover was conducted in a flow through reactor to enhance and optimize the enzymatic digestibility. More than 80% of glucan digestibility was achieved by pretreatment at 190 °C. Addition of a small amount of K2CO3 (0.45–0.9 wt.%) can enhance the pretreatment and allow use of lower temperatures. Switchgrass pretreated at 190 °C only with water had higher internal surface area than that pretreated in the presence of K2CO3, but both the substrates showed similar glucan digestibility. In comparison to switchgrass, corn stover required milder pretreatment conditions. The liquid hydrolyzate generated during pretreatment was converted into carbon microspheres by hydrothermal carbonization, providing a value-added byproduct. 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| subjects | Alcohols: methanol, ethanol, etc Alternative fuels. Production and utilization Applied sciences Benign bioreactors carbon carbon microspheres Carbonization catalysts Corn stover Energy enzymatic hydrolysis ethanol ethanol fuels Exact sciences and technology fermentation Fuels glucans hot water treatment Hydrothermal lignocellulose microspheres optimization Panicum virgatum physical properties potassium carbonate Pretreatment product quality soil conditioners Subcritical water Switchgrass water temperature |
| title | Hydrothermal pretreatment of switchgrass and corn stover for production of ethanol and carbon microspheres |
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