Tag: biochar

Zhe Han Weng and Annette L. Cowie IN: Communications Earth & Environment, https://doi.org/10.1038/s43247-025-02228-x

Nineteen published studies estimate global climate change mitigation potential of biochar at 0.03 to 11 Pg CO₂ equivalent yr⁻¹. Reconciling this range requires consideration of biochar science. Biochar systems durably sequester carbon, can reduce soil greenhouse gas (GHG) emissions, displace fossil fuel emissions through use of syngas, and avoid GHG emissions from residues. The authors reviewed the contributions to CO₂ removal and GHG emissions reduction.

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Zhe Han Weng, Annette L. Cowie IN: Communications Earth & Environment, https://doi.org/10.1038/s43247-025-00640-7

Biochar is a carbon dioxide (CO₂) removal strategy that supports food security, sustainable land management and the circular economy. Nineteen published studies estimate global climate change mitigation potential of biochar at 0.03 to 11 Pg CO₂ equivalent yr⁻¹. Reconciling this range requires consideration of biochar science. Biochar systems durably sequester carbon, can reduce soil greenhouse gas (GHG) emissions, displace fossil fuel emissions through use of syngas, and avoid GHG emissions from residues. The authors reviewed the contributions to CO₂ removal and GHG emissions reduction.

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Zhe Han Weng, Annette L. Cowie IN: Nature – communications earth & environment, DOI: 10.1038/s43247-025-02228-x

The authors reviewed the contributions of biochar to CO₂ removal and greenhouse gas emissions reduction. They conclude that new assessments are needed, utilising integrated assessment models that incorporate latest understanding of biochar processes and feedstock availability.

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Chen Zhang, Duoyong Zhang, Xinqi Zhang, Linrui Chen, Xiaoou Chen, Yongqiang Tian, Liwei Wang IN: Fundamental Research, https://doi.org/10.1016/j.scitotenv.2025.178723

Honeycomb-like nitrogen-doped ultramicroporous biochar for CO₂ capture is synthesized through various methods utilizing biomass, urea, and KOH as raw materials, nitridation agent, and porogen, respectively. The resulting materials meticulously undergo comprehensive characterization, revealing densely packed ultramicropores arranged in honeycomb-like patterns. The biochar predominantly exists in a graphite state of carbon with sufficient defects and abundant functional groups, along with a high nitrogen content, thereby providing numerous CO₂ sorption sites.

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Medilė Jokubė, Matti Hyyrynen, Sampo Pihlainen, Kari Hyytiäinen IN: Carbon Management, https://doi.org/10.1080/17583004.2025.2465328

The authors conduct an economic analysis to assess the economic feasibility of increasing Finnish mineral agricultural soil carbon stock with biochar in an increasingly dry and warm climate scenario. The Monte Carlo simulations showed that it is challenging to achieve economic feasibility with current carbon prices and biochar costs. To make biochar application economically feasible with a carbon subsidy at the level of the European Union Emissions Trading System (EU ETS) carbon price of 88 EUR/t CO₂eq, the cost of biochar material would need to be reduced to less than one-third of its current average price. 

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Bei Yan, Yue Hu, Qun Huan, Zonghao Liu, Jiahao Lai, Shaofeng Wang, Min Song IN: Chemical Engineering Journal, https://doi.org/10.1016/j.cej.2025.160920

Herein, the novel cold-bonded artificial lightweight aggregates (CALAs) with high carbon sequestration performance and negative carbon footprint were developed by coupling modified biochar with multi-source solid waste. The addition of 3 wt% modified biochar (acid-modified, alkali-modified, and amine-modified) could enhance the physical and mechanical properties of CALAs, accelerated the mineralization reaction rate, and achieved negative carbon emissions.

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Gang Li, Rongchuan Ye, Shumin Wu, Xianghui Liu, Meijing Huang, Jianda Guo, Yan Gao, Wei Chen, Yan Ma IN: Carbon Research 4, 23, https://doi.org/10.1007/s44246-024-00185-2

The oxidation of biochar occurs due to both natural and human influences during the soil carbon sequestration process. Therefore, it is crucial to produce high-stability biochar to achieve carbon neutrality. Fly ash-doped biochar was obtained from fly ash and corn stalks by employing hydrothermal/pyrolysis treatment, along with alkali impregnation at different temperatures. The microstructural characteristics and carbon sequestration potentials were studied as an essential performance parameter that was influenced by mineral doping and treatment temperature. 

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