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- W2986042940 abstract "The 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." @default.
- W2986042940 created "2019-11-22" @default.
- W2986042940 creator A5000986593 @default.
- W2986042940 creator A5003364222 @default.
- W2986042940 creator A5040820267 @default.
- W2986042940 creator A5078101102 @default.
- W2986042940 creator A5089317030 @default.
- W2986042940 date "2019-11-06" @default.
- W2986042940 modified "2023-10-01" @default.
- W2986042940 title "A Review of Chemicals to Produce Activated Carbon from Agricultural Waste Biomass" @default.
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