Suppression of methane–air explosions using air-jet-driven NaHCO3 powder and porous barrier

Suppression of methane–air explosions using air-jet-driven NaHCO3 powder and porous barrier | 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 Article Suppression of methane–air explosions using air-jet-driven NaHCO3 powder and porous barrier Zhenglong Qiao, Qianfei Miao, Heng Ma, Liang Xu, Rong Li, Jie Gao This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-4410521/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 The inhibition of methane–air explosions by air-jet-driven NaHCO 3 powders and porous barriers was investigated in this study. Flame images and overpressure data were recorded using high-speed cameras and pressure sensors. The inhibition mechanism of NaHCO 3 powder was further investigated using the reaction mechanism of sodium-containing substances and methane combustion. The results showed that NaHCO 3 powder driven by high-pressure gas jets reduces the average propagation speed of flame fronts and the rising rate of overpressure. The presence of porous barriers increases the turbulence intensity in the pipe and the travel time of the NaHCO 3 particles. Thus, the contact time between the large particle powder and the flame increases, and the inhibiting effect on flame propagation gradually increases as the obstruction rate increases. NaHCO 3 powder inhibits methane–air explosions through physical and chemical mechanisms. From a chemical perspective, sodium-containing radicals preferentially react with CO in the system to form CO 2 , reducing the production of H * and OH * radicals in the reaction system. The cycle of gaseous Na and NaOH also consumes H * and OH * radicals in the system, blocking the chain reaction. Physical sciences/Engineering Physical sciences/Physics/Fluid dynamics air jet porous barrier NaHCO3 methane explosion chain reaction 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-4410521","acceptedTermsAndConditions":true,"allowDirectSubmit":true,"archivedVersions":[],"articleType":"Article","associatedPublications":[],"authors":[{"id":308210594,"identity":"ec5300b6-cf73-449b-94f0-6144c25dc8ae","order_by":0,"name":"Zhenglong Qiao","email":"data:image/png;base64,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","orcid":"","institution":"Jilin Institute of Chemical Technology","correspondingAuthor":true,"prefix":"","firstName":"Zhenglong","middleName":"","lastName":"Qiao","suffix":""},{"id":308210598,"identity":"3fe32a39-e3cf-4c26-9411-57c212b23442","order_by":1,"name":"Qianfei Miao","email":"","orcid":"","institution":"Jilin Institute of Chemical Technology","correspondingAuthor":false,"prefix":"","firstName":"Qianfei","middleName":"","lastName":"Miao","suffix":""},{"id":308210599,"identity":"4ac44fc4-5e3b-4dfd-bcec-d05bb1f10e16","order_by":2,"name":"Heng Ma","email":"","orcid":"","institution":"Liaoning Technical University","correspondingAuthor":false,"prefix":"","firstName":"Heng","middleName":"","lastName":"Ma","suffix":""},{"id":308210600,"identity":"c8cc4eea-37a4-4d62-85fc-b884a8eea740","order_by":3,"name":"Liang Xu","email":"","orcid":"","institution":"Jilin Institute of Chemical Technology","correspondingAuthor":false,"prefix":"","firstName":"Liang","middleName":"","lastName":"Xu","suffix":""},{"id":308210601,"identity":"653e763b-5276-4a42-aa93-fe64e23ed357","order_by":4,"name":"Rong Li","email":"","orcid":"","institution":"Jilin Institute of Chemical Technology","correspondingAuthor":false,"prefix":"","firstName":"Rong","middleName":"","lastName":"Li","suffix":""},{"id":308210602,"identity":"b2b9e105-0a42-417e-95d6-63a4cc0691b3","order_by":5,"name":"Jie Gao","email":"","orcid":"","institution":"Jilin Institute of Chemical Technology","correspondingAuthor":false,"prefix":"","firstName":"Jie","middleName":"","lastName":"Gao","suffix":""}],"badges":[],"createdAt":"2024-05-13 03:53:22","currentVersionCode":1,"declarations":"","doi":"10.21203/rs.3.rs-4410521/v1","doiUrl":"https://doi.org/10.21203/rs.3.rs-4410521/v1","draftVersion":[],"editorialEvents":[],"editorialNote":"","failedWorkflow":false,"files":[{"id":62856855,"identity":"76265506-c60e-4c43-b14d-3a371f026991","added_by":"auto","created_at":"2024-08-20 09:41:15","extension":"pdf","order_by":1,"title":"","display":"","copyAsset":false,"role":"manuscript-pdf","size":1502383,"visible":true,"origin":"","legend":"","description":"","filename":"Manuscript.pdf","url":"https://assets-eu.researchsquare.com/files/rs-4410521/v1_covered_0f0db501-14ed-446e-89c1-f5965c166da9.pdf"}],"financialInterests":"No competing interests reported.","formattedTitle":"Suppression of methane–air explosions using air-jet-driven NaHCO3 powder and porous barrier","fulltext":[],"fulltextSource":"","fullText":"","funders":[],"hasAdminPriorityOnWorkflow":false,"hasManuscriptDocX":false,"hasOptedInToPreprint":true,"hasPassedJournalQc":"","hasAnyPriority":false,"hideJournal":true,"highlight":"","institution":"","isAcceptedByJournal":false,"isAuthorSuppliedPdf":true,"isDeskRejected":"","isHiddenFromSearch":false,"isInQc":false,"isInWorkflow":false,"isPdf":true,"isPdfUpToDate":true,"isWithdrawnOrRetracted":false,"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},"keywords":"air jet, porous barrier, NaHCO3, methane, explosion, chain reaction","lastPublishedDoi":"10.21203/rs.3.rs-4410521/v1","lastPublishedDoiUrl":"https://doi.org/10.21203/rs.3.rs-4410521/v1","license":{"name":"CC BY 4.0","url":"https://creativecommons.org/licenses/by/4.0/"},"manuscriptAbstract":"\u003cp\u003eThe inhibition of methane\u0026ndash;air explosions by air-jet-driven NaHCO\u003csub\u003e3\u003c/sub\u003e powders and porous barriers was investigated in this study. Flame images and overpressure data were recorded using high-speed cameras and pressure sensors. The inhibition mechanism of NaHCO\u003csub\u003e3\u003c/sub\u003e powder was further investigated using the reaction mechanism of sodium-containing substances and methane combustion. The results showed that NaHCO\u003csub\u003e3\u003c/sub\u003e powder driven by high-pressure gas jets reduces the average propagation speed of flame fronts and the rising rate of overpressure. The presence of porous barriers increases the turbulence intensity in the pipe and the travel time of the NaHCO\u003csub\u003e3\u003c/sub\u003e particles. Thus, the contact time between the large particle powder and the flame increases, and the inhibiting effect on flame propagation gradually increases as the obstruction rate increases. NaHCO\u003csub\u003e3\u003c/sub\u003e powder inhibits methane\u0026ndash;air explosions through physical and chemical mechanisms. From a chemical perspective, sodium-containing radicals preferentially react with CO in the system to form CO\u003csub\u003e2\u003c/sub\u003e, reducing the production of H\u003csup\u003e*\u003c/sup\u003e and OH\u003csup\u003e*\u003c/sup\u003e radicals in the reaction system. The cycle of gaseous Na and NaOH also consumes H\u003csup\u003e*\u003c/sup\u003e and OH\u003csup\u003e*\u003c/sup\u003e radicals in the system, blocking the chain reaction.\u003c/p\u003e","manuscriptTitle":"Suppression of methane–air explosions using air-jet-driven NaHCO3 powder and porous barrier","msid":"","msnumber":"","nonDraftVersions":[{"code":1,"date":"2024-05-30 03:51:14","doi":"10.21203/rs.3.rs-4410521/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":"85c8aba3-0042-48d1-9a3f-171d4ff9dee4","owner":[],"postedDate":"May 30th, 2024","published":true,"recentEditorialEvents":[],"rejectedJournal":[],"revision":"","amendment":"","status":"posted","subjectAreas":[{"id":32558039,"name":"Physical sciences/Engineering"},{"id":32558040,"name":"Physical sciences/Physics/Fluid dynamics"}],"tags":[],"updatedAt":"2024-08-20T09:33:06+00:00","versionOfRecord":[],"versionCreatedAt":"2024-05-30 03:51:14","video":"","vorDoi":"","vorDoiUrl":"","workflowStages":[]},"version":"v1","identity":"rs-4410521","journalConfig":"researchsquare"},"__N_SSP":true},"page":"/article/[identity]/[[...version]]","query":{"redirect":"/article/rs-4410521","identity":"rs-4410521","version":["v1"]},"buildId":"qtupq5eGEP_6zYnWcrvyt","isFallback":false,"isExperimentalCompile":false,"dynamicIds":[84888],"gssp":true,"scriptLoader":[]}