Corncob Hydrolysis Using Graphene Oxide Activated Coconut Shell Biochar Catalyst

Corncob Hydrolysis Using Graphene Oxide Activated Coconut Shell Biochar Catalyst | Research Square window.SnipcartSettings = { analytics: { enabled: false } }; (function() { var accessVector = localStorage.getItem('access_vector') || ''; window.dataLayer = window.dataLayer || []; if (accessVector) { window.dataLayer.push({ user: { profile: { profileInfo: { snid: accessVector } } } }); } })(); (function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src='https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);})(window,document,'script','dataLayer','GTM-K279D39R'); Browse Preprints In Review Journals COVID-19 Preprints AJE Video Bytes Research Tools Research Promotion AJE Professional Editing AJE Rubriq About Preprint Platform In Review Editorial Policies Our Team Advisory Board Help Center Sign In Submit a Preprint Cite Share Download PDF Research Article Corncob Hydrolysis Using Graphene Oxide Activated Coconut Shell Biochar Catalyst Ogechukwu Jude Igboke, Temitope Orimolade, Charmy Jani, Oludare Johnson Odejobi, and 1 more This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-4396654/v1 This work is licensed under a CC BY 4.0 License Status: Posted Version 1 posted You are reading this latest preprint version Abstract Purpose: Graphene oxide (GO) synthesized by Hummers method is an effective catalyst for biomass hydrolysis and sugar production. However, due to its small size and hydrophilicity, its post-reaction separation by filtration of the aqueous reaction mixture is challenging. Therefore, GO was supported on larger biochar particles, and the catalytic activity of the composite particles was evaluated. Methods: Mesoporous biochar was prepared using phosphoric acid-activated coconut shell at a relatively low carbonization temperature of 450 °C. The catalytic activity of the biochar-supported GO catalyst on corncob hydrolysis was investigated using the I -optimal response surface methodology. Neat GO and sulfonated high-temperature biochar (SBC700) were used as references. Results: Optimized reaction conditions for high sugar yields were identified. Under these conditions, the biochar-supported catalyst showed a sugar yield comparable to neat GO and SBC700 despite its lower sulfonic acid density. The biochar-supported catalyst could be recycled and reused with about 35 % decrease in the sugar yield after the first use. A similar reduction in the activity of SBC700 suggested no significant loss of GO from the biochar-supported catalyst under the hydrolysis conditions. Conclusion: The sugar yield per unit mass of corncob was found to be linearly dependent on the catalyst concentration and the reaction time. The acid density, a measure of the concentration of acidic groups on the catalyst surface, is an important factor determining the catalytic activity. The study suggests that increasing the acid density by augmenting the GO loading of the biochar particles could lead to higher sugar yields. Chemical Engineering Catalysis Renewable Resources biochar graphene oxide corn hydrolysis solid acid catalyst response surface methodology catalyst recycling Full Text Additional Declarations The authors declare no competing interests. Cite Share Download PDF Status: Posted Version 1 posted You are reading this latest preprint version Research Square lets you share your work early, gain feedback from the community, and start making changes to your manuscript prior to peer review in a journal. As a division of Research Square Company, we’re committed to making research communication faster, fairer, and more useful. We do this by developing innovative software and high quality services for the global research community. Our growing team is made up of researchers and industry professionals working together to solve the most critical problems facing scientific publishing. Also discoverable on Platform About Our Team In Review Editorial Policies Advisory Board Help Center Resources Author Services Accessibility API Access RSS feed Manage Cookie Preferences © Research Square 2026 | ISSN 2693-5015 (online) Privacy Policy Terms of Service Do Not Sell My Personal Information {"props":{"pageProps":{"initialData":{"identity":"rs-4396654","acceptedTermsAndConditions":true,"allowDirectSubmit":true,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":300745411,"identity":"2043652f-4fcb-4a08-813a-4ae546a851d9","order_by":0,"name":"Ogechukwu Jude Igboke","email":"","orcid":"","institution":"Obafemi Awolowo University, Department of Chemical Engineering","correspondingAuthor":false,"prefix":"","firstName":"Ogechukwu","middleName":"Jude","lastName":"Igboke","suffix":""},{"id":300745412,"identity":"f5879943-1c4f-494f-b5dd-1bce7a275796","order_by":1,"name":"Temitope Orimolade","email":"","orcid":"","institution":"Clarkson 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Square","twitterHandle":"researchsquare","acdcEnabled":true,"dfaEnabled":false,"editorialSystem":"","reportingPortfolio":"","inReviewEnabled":false,"inReviewRevisionsEnabled":true},"keywords":"biochar, graphene oxide, corn hydrolysis, solid acid catalyst, response surface methodology, catalyst recycling","lastPublishedDoi":"10.21203/rs.3.rs-4396654/v1","lastPublishedDoiUrl":"https://doi.org/10.21203/rs.3.rs-4396654/v1","license":{"name":"CC BY 4.0","url":"https://creativecommons.org/licenses/by/4.0/"},"manuscriptAbstract":"\u003cp\u003e\u003cstrong\u003ePurpose:\u003c/strong\u003e Graphene oxide (GO) synthesized by Hummers method is an effective catalyst for biomass hydrolysis and sugar production. However, due to its small size and hydrophilicity, its post-reaction separation by filtration of the aqueous reaction mixture is challenging. Therefore, GO was supported on larger biochar particles, and the catalytic activity of the composite particles was evaluated.\u003c/p\u003e\n\u003cp\u003e\u003cstrong\u003eMethods: \u003c/strong\u003eMesoporous biochar was prepared using phosphoric acid-activated coconut shell at a relatively low carbonization temperature of 450 °C. The catalytic activity of the biochar-supported GO catalyst on corncob hydrolysis was investigated using the \u003cem\u003eI\u003c/em\u003e-optimal response surface methodology. Neat GO and sulfonated high-temperature biochar (SBC700) were used as references.\u003c/p\u003e\n\u003cp\u003e\u003cstrong\u003eResults: \u003c/strong\u003eOptimized reaction conditions for high sugar yields were identified. Under these conditions, the biochar-supported catalyst showed a sugar yield comparable to neat GO and SBC700 despite its lower sulfonic acid density. The biochar-supported catalyst could be recycled and reused with about 35 % decrease in the sugar yield after the first use. A similar reduction in the activity of SBC700 suggested no significant loss of GO from the biochar-supported catalyst under the hydrolysis conditions.\u003c/p\u003e\n\u003cp\u003e\u003cstrong\u003eConclusion:\u003c/strong\u003e The sugar yield per unit mass of corncob was found to be linearly dependent on the catalyst concentration and the reaction time. The acid density, a measure of the concentration of acidic groups on the catalyst surface, is an important factor determining the catalytic activity. The study suggests that increasing the acid density by augmenting the GO loading of the biochar particles could lead to higher sugar yields.\u003c/p\u003e","manuscriptTitle":"Corncob Hydrolysis Using Graphene Oxide Activated Coconut Shell Biochar Catalyst","msid":"","msnumber":"","nonDraftVersions":[{"code":1,"date":"2024-06-17 19:30:07","doi":"10.21203/rs.3.rs-4396654/v1","editorialEvents":[{"type":"communityComments","content":0}],"status":"published","journal":{"display":true,"email":"[email protected]","identity":"researchsquare","isNatureJournal":false,"hasQc":true,"allowDirectSubmit":true,"externalIdentity":"","sideBox":"","snPcode":"","submissionUrl":"/submission","title":"Research Square","twitterHandle":"researchsquare","acdcEnabled":true,"dfaEnabled":false,"editorialSystem":"","reportingPortfolio":"","inReviewEnabled":false,"inReviewRevisionsEnabled":true}}],"origin":"","ownerIdentity":"8b7bc345-23bc-4eab-9dd6-6136be9fa033","owner":[],"postedDate":"June 17th, 2024","published":true,"recentEditorialEvents":[],"rejectedJournal":[],"revision":"","amendment":"","status":"posted","subjectAreas":[{"id":31736702,"name":"Chemical Engineering"},{"id":31736703,"name":"Catalysis"},{"id":31736704,"name":"Renewable Resources"}],"tags":[],"updatedAt":"2024-06-17T19:30:07+00:00","versionOfRecord":[],"versionCreatedAt":"2024-06-17 19:30:07","video":"","vorDoi":"","vorDoiUrl":"","workflowStages":[]},"version":"v1","identity":"rs-4396654","journalConfig":"researchsquare"},"__N_SSP":true},"page":"/article/[identity]/[[...version]]","query":{"redirect":"/article/rs-4396654","identity":"rs-4396654","version":["v1"]},"buildId":"qtupq5eGEP_6zYnWcrvyt","isFallback":false,"isExperimentalCompile":false,"dynamicIds":[84888],"gssp":true,"scriptLoader":[]}