A review of chemicals to produce activated carbon from agricultural waste biomass

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dc.contributor.authorUkanwa, Kalu Samuel
dc.contributor.authorPatchigolla, Kumar
dc.contributor.authorSakrabani, Ruben
dc.contributor.authorAnthony, Edward J.
dc.contributor.authorMandavgane, Sachin
dc.date.accessioned2019-11-08T10:10:01Z
dc.date.available2019-11-08T10:10:01Z
dc.date.issued2019-11-06
dc.description.abstractThe choice of activating agent for the thermochemical production of high-grade activated carbon (AC) from agricultural residues and wastes, such as feedstock, requires innovative methods. Overcoming energy losses, and using the best techniques to minimise secondary contamination and improve adsorptivity, are critical. Here, we review the importance and influence of activating agents on agricultural waste: how they react and compare conventional and microwave processes. In particular, adsorbent pore characteristics, surface chemistry interactions and production modes were compared with traditional methods. It was concluded that there are no best activating agents; rather, each agent reacts uniquely with a precursor, and the optimum choice depends on the target adsorbent. Natural chemicals can also be as effective as inorganic activating agents, and offer the advantages that they are usually safe, and readily available. The use of a microwave, as an innovative pyrolysis approach, can enhance the activation process within a duration of 1–4 h and temperature of 500–1200 °C, after which the yield and efficiency decline rapidly due to molecular breakdown. This study also examines the biomass milling process requirements; the influence of the dielectric properties, along with the effect of washing; and experimental setup challenges. The microwave setup system, biomass feed rate, product delivery, inert gas flow rate, reactor design and recovery lines are all important factors in the microwave activation process, and contribute to the overall efficiency of AC preparation. However, a major issue is a lack of large-scale industrial demonstration units for microwave technology.en_UK
dc.identifier.citationUkanwa K, Patchigolla K, Sakrabani R, et al., A review of chemicals to produce activated carbon from agricultural waste biomass. Sustainability, Volume 11, Issue 22, 2019, Article number 6204en_UK
dc.identifier.issn2071-1050
dc.identifier.urihttps://doi.org/10.3390/su11226204
dc.identifier.urihttp://dspace.lib.cranfield.ac.uk/handle/1826/14694
dc.language.isoenen_UK
dc.publisherMDPIen_UK
dc.rightsAttribution 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/*
dc.subjectactivated carbonen_UK
dc.subjectactivating agenten_UK
dc.subjectadsorptionen_UK
dc.subjectagricultural wasteen_UK
dc.subjectbiomassen_UK
dc.subjectchemical activationen_UK
dc.subjectkinetic modelen_UK
dc.subjectmicrowave activationen_UK
dc.subjectwaste utilisationen_UK
dc.titleA review of chemicals to produce activated carbon from agricultural waste biomassen_UK
dc.typeArticleen_UK

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