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- W4313443103 abstract "In this study, activated biochars were prepared by CO2 and KOH activations for enhanced bio-oil adsorption in the slurry system. The results showed that activated biochars show better adsorption capacities on bio-oil than unactivated biochars due to the improved pore structure, and the highest adsorption rate reached 5.49 g bio-oil/g biochar by CO2 activated biochar prepared at 900 °C. The biochars especially activated biochars showed the best selectivity over aromatic compounds in bio-oil, followed by the selectivity over acids and ketones, and relatively weak selectivity for alcohols, aldehydes and monosaccharides. The average molecular weights of adsorbed bio-oil samples were 476–578 g/mol, higher than the 436 g/mol of bio-oil, implying the selective adsorption over heavy components. Biochar with large specific surface area, high O content or highly aromatized structure can facilitate the adsorption of monophenols and fused rings through pore filling, hydrogen bonding, π-π interactions and hydrophobic effect. Biochars with high O content can also have better adsorption selectivity on the acids and ketones in bio-oil via hydrogen bonding and electrostatic force. In summary, the developed pore structure, abundant O-containing functional groups, and high graphitization degree of biochar are beneficial for bio-oil adsorption." @default.
- W4313443103 created "2023-01-06" @default.
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- W4313443103 date "2023-04-01" @default.
- W4313443103 modified "2023-10-16" @default.
- W4313443103 title "Enhanced adsorption of bio-oil on activated biochar in slurry fuels and the adsorption selectivity" @default.
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- W4313443103 doi "https://doi.org/10.1016/j.fuel.2022.127224" @default.
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