Valorisation of residual biomass by pyrolysis: influence of process conditions on products

Vilas-Boas, A. C. M.; Tarelho, L. A. C.; Oliveira, H. S. M.; Silva, F. G. C. S.; Pio, D. T.; Matos, M. A. A.

doi:10.1039/d3se01216f

Cited by 3 publications

(2 citation statements)

References 63 publications

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“…The study conducted by Hanafi et al 45 found that biochars with a volatile matter content of 40% exhibited a breakdown rate of less than 10% over 100 years. The higher volatile matter content found in eggplant residue-derived biochar may serve as a valuable source of easily decomposable carbon (labile carbon) for microbial populations, as demonstrated by Vilas-Boas et al 46 . However, this greater volatile matter content could potentially have adverse effects on carbon storage, as it may lead to a positive priming impact.…”

Section: Discussionmentioning

confidence: 92%

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: 92%

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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“…During biochar production, pyrolysis temperature plays a key role in the thermochemical conversion of biomass [13,[16][17][18][19]23,24]. In general, biomass heated to high temperatures (>500 • C) produces biochar with a porous structure, large specific surface area (SSA), aromaticity, C-C content, and high pH, while those made at low temperatures (<400 • C) have a high yield and O/C and H/C ratio, and low electrical conductivity (EC), cation exchange capacity, and surface functional groups [16][17][18][19]25].…”

Section: Introductionmentioning

confidence: 99%

Biochars Derived from Olive Mill Byproducts: Typology, Characterization, and Eco-Efficient Application in Agriculture—A Systematic Review

Lustosa Filho,

da Silva,

Costa

et al. 2024

Sustainability

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In the context of climate change and the circular economy, biochar agricultural and environmental applications have attracted a good deal of attention. Biochar has unique characteristics like surface area, porosity, water-holding capacity, pH, surface charge, and nutrients. This study reviews the biochar production from olive pomace (OP) and olive stone (OS) byproducts, its chemical and physical characterization, and its environmental application. The current review highlights the conditions for biochar production, the effects of pyrolysis temperature, and feedstock type on the physicochemical properties of biochar. High pyrolysis temperature (>500 °C) promotes a high specific surface area, high porosity (especially for OS biochars), and pH as well as the content of ash and fixed carbon, but generates low cation exchange capacity (CEC) and electrical conductivity (EC) and high values of O/C and H/C ratio. OP biochar also presents a high C amount, and ash content, i.e., rich in nutrients and high alkalizing capacity. OP biochar serves as an important source of plant nutrients, especially potassium. After adding both types of biochar, aggregate stability and the amount of water held in soil increase, and bulk density and bioavailability of trace elements decrease. Thus, biochar from olive mill wastes can be a potential plant nutrient reservoir, a good amendment to improve soil properties and long-term carbon sequestration. Results presented in this review can be used to build designer biochars from olive mill wastes to help solve environmental issues (water purification and pollutant remediation) and are suitable for improving soil physical chemistry characteristics and crop growth.

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Heracleum sosnowskyi pyrolysis – Energy and environmental aspects of biochar utilization

Świechowski,

Rosik,

Bednik

et al. 2024

Bioresource Technology

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Valorisation of residual biomass by pyrolysis: influence of process conditions on products

Abstract: In the context of sustainable residual biomass management, this work explores the pyrolysis process of residual biomass using a bench-scale fixed bed reactor.

Cited by 3 publications

References 63 publications

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

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

Biochars Derived from Olive Mill Byproducts: Typology, Characterization, and Eco-Efficient Application in Agriculture—A Systematic Review

Heracleum sosnowskyi pyrolysis – Energy and environmental aspects of biochar utilization

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