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Adsorption of volatile organic compounds on activated carbon with included iron phosphate
Stockholm University, Faculty of Science, Department of Materials and Environmental Chemistry (MMK).ORCID iD: 0000-0001-8225-9670
Stockholm University, Faculty of Science, Department of Materials and Environmental Chemistry (MMK), Inorganic and Structural Chemistry.ORCID iD: 0000-0001-7286-1211
Stockholm University, Faculty of Science, Department of Materials and Environmental Chemistry (MMK), Materials Chemistry.ORCID iD: 0000-0002-7569-273X
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2023 (English)In: Carbon trends, ISSN 2667-0569, Vol. 11, article id 100259Article in journal (Refereed) Published
Abstract [en]

Volatile organic compounds (VOCs) are often hazardous and need commonly to be removed from gas mixtures. Capture on activated carbon (AC) is one approach to achieving this. We hypothesized that the smallest pores on ACs and the inclusion of inorganic phosphates could enhance the low gas pressure uptake of two typical VOCs (acetone and isopropanol). To test this hypothesis, ACs were prepared by chemical activation of hydrochars with H3PO4 or a mixture of FeCl3 and H3PO4. The hydrochars had been prepared by hydrothermal carbonization of glucose. The ACs were characterized by XRD, IR, TGA, and the adsorption of N2, CO2, H2O, acetone, and isopropanol. The results showed that the ACs had comparably high adsorption of acetone and isopropanol at low vapor pressures. The low-pressure uptake (at 0.03 kPa) of isopropanol and acetone had values of up to 3.4 mmol/g and 2.2 mmol/g, respectively. This suggests that ACs containing iron phosphate could be of relevance for adsorption driven removal of VOC. It was also observed that the external surface area of the ACs containing iron phosphates increased upon secondary heat treatment in N2.

Place, publisher, year, edition, pages
2023. Vol. 11, article id 100259
National Category
Materials Chemistry
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URN: urn:nbn:se:su:diva-228544DOI: 10.1016/j.cartre.2023.100259ISI: 001030948100001Scopus ID: 2-s2.0-85151239392OAI: oai:DiVA.org:su-228544DiVA, id: diva2:1853281
Funder
Mistra - The Swedish Foundation for Strategic Environmental Research, 2015/31Knut and Alice Wallenberg FoundationAvailable from: 2024-04-22 Created: 2024-04-22 Last updated: 2024-04-22Bibliographically approved
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Saadattalab, VahidTai, Cheuk-WaiBacsik, ZoltánHedin, Niklas

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