Adsorption of volatile organic compounds and microwave regeneration on self-prepared high-surface-area beaded activated carbon

Adsorption of volatile organic compounds and microwave regeneration on self-prepared high-surface-area beaded activated carbon | 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 Adsorption of volatile organic compounds and microwave regeneration on self-prepared high-surface-area beaded activated carbon Shih-Ying Hsiao, Shu-Wen You, Can Wang, Ji-Guang Deng, Hsing-Cheng Hsi This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-948405/v1 This work is licensed under a CC BY 4.0 License Status: Published Journal Publication published 01 Jan, 2022 Read the published version in Aerosol and Air Quality Research → Version 1 posted You are reading this latest preprint version Abstract Self-prepared beaded activated carbons (SBAC) were derived from carbonized phenolic formaldehyde (PF) resins through an optimal activation procedure (900 o C for 4 h) using CO 2 . A commercial BAC (termed KBAC) was adopted to compare with SBAC over physicochemical properties, adsorption performance against methyl ethyl ketone (MEK) and toluene (TOL), and the regenerability using microwave irradiation. Langmuir, Freundlich, and Dubinin-Radushkevich (D-R) isotherm models showed good fitting results to explain the adsorption equilibrium. The isosteric heat of adsorption was calculated using the Clausius-Clapeyron equation; the parameters obtained from the D-R isotherm indicate that the interactions between adsorbate and adsorbent were mainly due to physisorption. Microwave heating was applied to the regeneration of saturated adsorbents to examine the effect of irradiation power and heating time on the desorption behavior of adsorbate. Within 12 min of microwave irradiation, excellent desorption efficiencies based on gravimetric method were shown, reaching 110.7 ± 14.4, 104.4 ± 2.6, 90.2 ± 2.3, and 85.5 ± 5.7% for MEK-SBAC, MEK-KBAC, TOL-SBAC, and TOL-KBAC, respectively. After an 8-cycle of adsorption/regeneration, the adsorption capacity for SBAC was significantly decreased when loaded with TOL, whereas it was more significant than the virgin sample as loaded with MEK. In contrast, KBAC was able to sustain the adsorption capacity after an 8-cycle of regeneration, proving its stability throughout the microwave heating. Kinetic models were further employed to illustrate the desorption of the adsorbates from BAC samples, showing that intraparticle diffusion in SBAC and KBAC was the rate-limiting step during microwave heating. The core kinetic parameters obtained could provide insights for lab-scale adsorbent beds or practical engineering scale design. In conclusion, this study demonstrates the excellent adsorption performance of SBAC and the feasibility of microwave regeneration of BACs. Renewable Resources Environmental Engineering volatile organic compounds toluene methyl ethyl ketone beaded activated carbon microwave regeneration Full Text Supplementary Files SER74SupplementaryMaterials.docx Cite Share Download PDF Status: Published Journal Publication published 01 Jan, 2022 Read the published version in Aerosol and Air Quality Research → 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. 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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-948405","acceptedTermsAndConditions":true,"allowDirectSubmit":true,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":55397827,"identity":"4544384f-2fb5-47a5-a2f5-fd642ebb734d","order_by":0,"name":"Shih-Ying Hsiao","email":"","orcid":"","institution":"National Taiwan University","correspondingAuthor":false,"submittingAuthor":false,"prefix":"","firstName":"Shih-Ying","middleName":"","lastName":"Hsiao","suffix":""},{"id":55397828,"identity":"8be29e3e-5f1a-455b-8a88-3b18fd6b1a9e","order_by":1,"name":"Shu-Wen You","email":"","orcid":"","institution":"National Taiwan 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