Importance of oxygen-containing functionalities and pore structures of biochar in catalyzing pyrolysis of homologous poplar

Qiu, Li; Li, Chao; Zhang, Shu; Wang, Shuang; Li, Bin; Cui, Zhenhua; Tang, Yonggui; Tursunov, Obid; Hu, Xun

doi:10.1016/j.cjche.2023.09.002

Cited by 8 publications

(1 citation statement)

References 53 publications

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“…Nevertheless, the eggplant biomass had a higher potassium (K) concentration compared to its charcoal, indicating a gradual release of potassium during the pyrolysis process. Qiu et al 72 observed a decline in the concentration of potassium as the temperature of pyrolysis increased. This phenomenon can be elucidated by the binding of potassium to the carbonyl functional groups 73 and the subsequent formation of a stable molecule (K 2 CO 3 ) 37 , which render it unextractable via the ammonium acetate process.…”

Section: Discussionmentioning

confidence: 99%

Liming potential and characteristics of biochar produced from woody and non-woody biomass at different pyrolysis temperatures

Murtaza,

Usman,

Iqbal

et al. 2024

Sci Rep

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Large amount of wastes are burnt or left to decompose on site or at landfills where they cause air pollution and nutrient leaching to groundwater. Waste management strategies that return these food wastes to agricultural soils recover the carbon and nutrients that would otherwise have been lost, enrich soils and improve crop productivity. The incorporation of liming materials can neutralize the protons released, hence reducing soil acidity and its adverse impacts to the soil environment, food security, and human health. Biochar derived from organic residues is becoming a source of carbon input to soil and provides multifunctional values. Biochar can be alkaline in nature, with the level of alkalinity dependent upon the feedstock and processing conditions. This study conducted a characterization of biochar derived from the pyrolysis process of eggplant and Acacia nilotica bark at temperatures of 300 °C and 600 °C. An analysis was conducted on the biochar kinds to determine their pH, phosphorus (P), as well as other elemental composition. The proximate analysis was conducted by the ASTM standard 1762-84, while the surface morphological features were measured using a scanning electron microscope. The biochar derived from Acacia nilotica bark exhibited a greater yield and higher level of fixed carbon while possessing a lower content of ash and volatile components compared to biochar derived from eggplant. The eggplant biochar exhibits a higher liming ability at 600 °C compared to the acacia nilotica bark-derived biochar. The calcium carbonate equivalent, pH, potassium (K), and phosphorus (P) levels in eggplant biochars increased as the pyrolysis temperature increased. The results suggest that biochar derived from eggplant could be a beneficial resource for storing carbon in the soil, as well as for addressing soil acidity and enhancing nutrients availability, particularly potassium and phosphorus in acidic soils.

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Section: Discussionmentioning

confidence: 99%