Study on oxidation kinetic behavior and oxidation exothermic ignition-inducing characteristics of crude oil

Study on oxidation kinetic behavior and oxidation exothermic ignition-inducing characteristics of crude oil | 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 on oxidation kinetic behavior and oxidation exothermic ignition-inducing characteristics of crude oil Zhezhi Z. Liu, Bowen Yang, Suhan Zhang, Bin Huang, Wei Zhuo This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-8262754/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 Air injection oil displacement is a highly promising enhanced oil recovery technology due to its wide gas source availability, low cost and strong reservoir adaptability. The auto-ignition behavior and oxidation characteristics of crude oil are critical to its combustion performance and upgrading efficiency. This study addresses the limitations of existing research, particularly the singular methods for determining auto-ignition and the lack of quantitative basis. Using a light crude oil from western China, we employed a combined approach with TG, PDSC, and ARC to investigate its oxidation and exothermic behavior. Special emphasis was placed on analyzing the auto-ignition temperature, sustainability of exothermic reactions, and kinetic parameters, clarifying oxidative auto-ignition feasibility. Kinetic models were established using two typical iso-conversional methods to quantify reaction parameters for both LTO and HTO stages. The results indicate that the primary reaction below 175°C is distillation and volatilization, with LTO and HTO mass loss rates of 81.5% and 18.5% respectively (10°C min − 1 ), and corresponding enthalpies of 15.8668 kJ g − 1 and 6.1395 kJ g − 1 . High pressure conditions significantly inhibit the volatilization of light components, elevating the LTO exothermic intensity to 55 mW mg − 1 —170% higher than under atmospheric pressure. The total heat release ranges from 19.2164 to 37.0479 kJ g − 1 , with high pressure reducing the HTO initiation temperature by 71.8°C. Under reservoir conditions, LTO exotherm occurs, and the auto-ignition temperature is determined as 262.8°C. Sustained exothermicity confirms that air injection is suitable for this light oil reservoir. This study provides important guidance for designing air injection schemes in similar reservoirs. Light crude oil Air injection Oxidation kinetics Auto-ignition feasibility Full Text Additional Declarations No competing interests reported. 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-8262754","acceptedTermsAndConditions":true,"allowDirectSubmit":true,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":587630305,"identity":"7de7ebec-5b6a-4146-aa11-f50c6b89fdf6","order_by":0,"name":"Zhezhi Z. 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The auto-ignition behavior and oxidation characteristics of crude oil are critical to its combustion performance and upgrading efficiency. This study addresses the limitations of existing research, particularly the singular methods for determining auto-ignition and the lack of quantitative basis. Using a light crude oil from western China, we employed a combined approach with TG, PDSC, and ARC to investigate its oxidation and exothermic behavior. Special emphasis was placed on analyzing the auto-ignition temperature, sustainability of exothermic reactions, and kinetic parameters, clarifying oxidative auto-ignition feasibility. Kinetic models were established using two typical iso-conversional methods to quantify reaction parameters for both LTO and HTO stages. The results indicate that the primary reaction below 175\u0026deg;C is distillation and volatilization, with LTO and HTO mass loss rates of 81.5% and 18.5% respectively (10\u0026deg;C min\u003csup\u003e\u0026minus;\u0026thinsp;1\u003c/sup\u003e), and corresponding enthalpies of 15.8668 kJ g\u003csup\u003e\u0026minus;\u0026thinsp;1\u003c/sup\u003e and 6.1395 kJ g\u003csup\u003e\u0026minus;\u0026thinsp;1\u003c/sup\u003e. High pressure conditions significantly inhibit the volatilization of light components, elevating the LTO exothermic intensity to 55 mW mg\u003csup\u003e\u0026minus;\u0026thinsp;1\u003c/sup\u003e\u0026mdash;170% higher than under atmospheric pressure. The total heat release ranges from 19.2164 to 37.0479 kJ g\u003csup\u003e\u0026minus;\u0026thinsp;1\u003c/sup\u003e, with high pressure reducing the HTO initiation temperature by 71.8\u0026deg;C. Under reservoir conditions, LTO exotherm occurs, and the auto-ignition temperature is determined as 262.8\u0026deg;C. Sustained exothermicity confirms that air injection is suitable for this light oil reservoir. This study provides important guidance for designing air injection schemes in similar reservoirs.\u003c/p\u003e","manuscriptTitle":"Study on oxidation kinetic behavior and oxidation exothermic ignition-inducing characteristics of crude oil","msid":"","msnumber":"","nonDraftVersions":[{"code":1,"date":"2026-02-10 13:21:41","doi":"10.21203/rs.3.rs-8262754/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":"29bfd936-eb6a-4017-b6cf-cbdcb414d1c8","owner":[],"postedDate":"February 10th, 2026","published":true,"recentEditorialEvents":[],"rejectedJournal":[],"revision":"","amendment":"","status":"posted","subjectAreas":[],"tags":[],"updatedAt":"2026-04-22T21:38:58+00:00","versionOfRecord":[],"versionCreatedAt":"2026-02-10 13:21:41","video":"","vorDoi":"","vorDoiUrl":"","workflowStages":[]},"version":"v1","identity":"rs-8262754","journalConfig":"researchsquare"},"__N_SSP":true},"page":"/article/[identity]/[[...version]]","query":{"redirect":"/article/rs-8262754","identity":"rs-8262754","version":["v1"]},"buildId":"XKTyCvWXoU3ODBz1xrDgd","isFallback":false,"isExperimentalCompile":false,"dynamicIds":[84888],"gssp":true,"scriptLoader":[]}