Study of the Co2 Hydrogenation Reaction for the Synthesis of Alcohols on Cu and Co-based Catalysts

Study of the Co2 Hydrogenation Reaction for the Synthesis of Alcohols on Cu and Co-based Catalysts | 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 Study of the Co2 Hydrogenation Reaction for the Synthesis of Alcohols on Cu and Co-based Catalysts Francisco Marcelo dos Santos de Oliveira, Janaina Fernandes Gomes This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-5086098/v1 This work is licensed under a CC BY 4.0 License Status: Published Journal Publication published 23 Jul, 2025 Read the published version in Brazilian Journal of Chemical Engineering → Version 1 posted 5 You are reading this latest preprint version Abstract Carbon dioxide (CO 2 ) is the main gas responsible for the greenhouse effect. Anthropogenic activities have increased the concentration of this gas in the atmosphere in recent years, intensifying the greenhouse effect and resulting in anomalous climate phenomena. CO 2 recycling technologies have been developed with the aim of reducing the impacts of this gas on climate change. Catalytic hydrogenation of CO 2 for the generation of products of commercial interest, such as methanol (CH 3 OH) and ethanol (C 2 H 5 OH), for example, is a technology that has attracted the attention of recent research, given the wide industrial applicability of these alcohols and the possibility of carbon recycling. In the present study, CO 2 hydrogenation reaction was investigated to produce alcohols using catalysts based on cobalt, copper and a combination between cobalt and copper. It was observed that CuO-Co 3 O 4 -Al 2 O 3 catalysts with different Co:Cu mass ratios have improved methanol productivity when compared to CuO-Al 2 O 3 or Co 3 O 4 -Al 2 O 3 . Furthermore, the promotion of Co 3 O 4 -Al 2 O 3 by 2 wt.% Na, K, Rb or Cs showed better catalytic performance for the formation of ethanol, increasing its productivity up to 25 times compared to the non-promoted cobalt catalyst. The highest ethanol productivity in the present work, corresponding to 5.3 µmol/g cat .h, was achieved using the 2 wt.% K-Co 3 O 4 -Al 2 O 3 catalyst under the reaction conditions of T = 220 °C, P = P atm and GHSV = 24,000 mL/g cat .h. CO2 hydrogenation Alcohols Cobalt and copper-based catalysts Full Text Cite Share Download PDF Status: Published Journal Publication published 23 Jul, 2025 Read the published version in Brazilian Journal of Chemical Engineering → Version 1 posted Reviewers agreed at journal 18 Dec, 2024 Reviewers invited by journal 18 Dec, 2024 Editor invited by journal 18 Dec, 2024 Editor assigned by journal 16 Dec, 2024 First submitted to journal 12 Dec, 2024 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. 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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-5086098","acceptedTermsAndConditions":true,"allowDirectSubmit":false,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":392026062,"identity":"d477734f-22de-428f-af4e-55ee67812464","order_by":0,"name":"Francisco Marcelo dos Santos de Oliveira","email":"","orcid":"","institution":"Universidade Federal de São Carlos: Universidade Federal de Sao Carlos","correspondingAuthor":false,"prefix":"","firstName":"Francisco","middleName":"Marcelo dos Santos","lastName":"de Oliveira","suffix":""},{"id":392026063,"identity":"61718f04-0f03-4ed9-ba7a-5870b9cde9a3","order_by":1,"name":"Janaina Fernandes Gomes","email":"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAZAAAAAyAQMAAABI0h/eAAAABlBMVEX///8AAABVwtN+AAAACXBIWXMAAA7EAAAOxAGVKw4bAAAA5klEQVRIiWNgGAWjYBACxgYgkcDAwM/A3sDwASwkQaQWyQaeA4wziNICA5INEglEamFuP3vww8MddhLykW8MG3/U2OUzSPc+wO+wnrxkicQzyRKGt3MMm3mOJVs2yBw3wK+lIcdAIrGNuc5wdo75Y8YGZgMGiTT8DmPsf2P8I7GtXsJw5hnDxp8N9URomZFjBrTlsIS8BI9hA2/DYWK0vDGzSGw7LmHAk1YI9MtxAzaZY/i1GPbnGN/82VYtId9+eCMwxKoN+KXbCGhpgDIMDkAZbPg1MDDIwxkNeFSNglEwCkbByAYAQehDjg08aOYAAAAASUVORK5CYII=","orcid":"https://orcid.org/0000-0002-9542-8944","institution":"Universidade Federal de Sao Carlos Centro de Ciencias Exatas e de Tecnologia","correspondingAuthor":true,"prefix":"","firstName":"Janaina","middleName":"Fernandes","lastName":"Gomes","suffix":""}],"badges":[],"createdAt":"2024-09-13 22:17:21","currentVersionCode":1,"declarations":"","doi":"10.21203/rs.3.rs-5086098/v1","doiUrl":"https://doi.org/10.21203/rs.3.rs-5086098/v1","draftVersion":[],"editorialEvents":[{"content":"https://doi.org/10.1007/s43153-025-00553-4","type":"published","date":"2025-07-23T15:57:49+00:00"}],"editorialNote":"","failedWorkflow":false,"files":[{"id":87756728,"identity":"12c0b23a-cdfe-402d-af96-ab5036a3223f","added_by":"auto","created_at":"2025-07-28 16:08:20","extension":"pdf","order_by":1,"title":"","display":"","copyAsset":false,"role":"manuscript-pdf","size":571030,"visible":true,"origin":"","legend":"","description":"","filename":"Oliveiraetalrevisedmanuscript.pdf","url":"https://assets-eu.researchsquare.com/files/rs-5086098/v1_covered_10035633-7165-4a51-933b-a40b52861890.pdf"}],"financialInterests":"","formattedTitle":"\u003cp\u003eStudy of the Co2 Hydrogenation Reaction for the Synthesis of Alcohols on Cu and Co-based Catalysts\u003c/p\u003e","fulltext":[],"fulltextSource":"","fullText":"","funders":[],"hasAdminPriorityOnWorkflow":false,"hasManuscriptDocX":false,"hasOptedInToPreprint":true,"hasPassedJournalQc":"","hasAnyPriority":false,"hideJournal":false,"highlight":"","institution":"","isAcceptedByJournal":true,"isAuthorSuppliedPdf":true,"isDeskRejected":"","isHiddenFromSearch":false,"isInQc":false,"isInWorkflow":true,"isPdf":true,"isPdfUpToDate":true,"isWithdrawnOrRetracted":false,"journal":{"display":true,"email":"[email protected]","identity":"brazilian-journal-of-chemical-engineering","isNatureJournal":false,"hasQc":true,"allowDirectSubmit":false,"externalIdentity":"bjce","sideBox":"Learn more about [Brazilian Journal of Chemical Engineering](http://link.springer.com/journal/43153)","snPcode":"43153","submissionUrl":"https://www.editorialmanager.com/bjce/default2.aspx","title":"Brazilian Journal of Chemical Engineering","twitterHandle":"","acdcEnabled":true,"dfaEnabled":true,"editorialSystem":"em","reportingPortfolio":"Springer Hybrid","inReviewEnabled":true,"inReviewRevisionsEnabled":false},"keywords":"CO2 hydrogenation, Alcohols, Cobalt and copper-based catalysts","lastPublishedDoi":"10.21203/rs.3.rs-5086098/v1","lastPublishedDoiUrl":"https://doi.org/10.21203/rs.3.rs-5086098/v1","license":{"name":"CC BY 4.0","url":"https://creativecommons.org/licenses/by/4.0/"},"manuscriptAbstract":"\u003cp\u003eCarbon dioxide (CO\u003csub\u003e2\u003c/sub\u003e) is the main gas responsible for the greenhouse effect. Anthropogenic activities have increased the concentration of this gas in the atmosphere in recent years, intensifying the greenhouse effect and resulting in anomalous climate phenomena. CO\u003csub\u003e2\u003c/sub\u003e recycling technologies have been developed with the aim of reducing the impacts of this gas on climate change. Catalytic hydrogenation of CO\u003csub\u003e2\u003c/sub\u003e for the generation of products of commercial interest, such as methanol (CH\u003csub\u003e3\u003c/sub\u003eOH) and ethanol (C\u003csub\u003e2\u003c/sub\u003eH\u003csub\u003e5\u003c/sub\u003eOH), for example, is a technology that has attracted the attention of recent research, given the wide industrial applicability of these alcohols and the possibility of carbon recycling. In the present study, CO\u003csub\u003e2\u003c/sub\u003e hydrogenation reaction was investigated to produce alcohols using catalysts based on cobalt, copper and a combination between cobalt and copper. It was observed that CuO-Co\u003csub\u003e3\u003c/sub\u003eO\u003csub\u003e4\u003c/sub\u003e-Al\u003csub\u003e2\u003c/sub\u003eO\u003csub\u003e3\u003c/sub\u003e catalysts with different Co:Cu mass ratios have improved methanol productivity when compared to CuO-Al\u003csub\u003e2\u003c/sub\u003eO\u003csub\u003e3\u003c/sub\u003e or Co\u003csub\u003e3\u003c/sub\u003eO\u003csub\u003e4\u003c/sub\u003e-Al\u003csub\u003e2\u003c/sub\u003eO\u003csub\u003e3\u003c/sub\u003e. Furthermore, the promotion of Co\u003csub\u003e3\u003c/sub\u003eO\u003csub\u003e4\u003c/sub\u003e-Al\u003csub\u003e2\u003c/sub\u003eO\u003csub\u003e3\u003c/sub\u003e by 2 wt.% Na, K, Rb or Cs showed better catalytic performance for the formation of ethanol, increasing its productivity up to 25 times compared to the non-promoted cobalt catalyst. 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