Technological Prospects of Biochar Derived from Viticulture Waste: Characterization and Application Perspectives

Energies Pub Date : 2024-07-11 DOI:10.3390/en17143421

Veronica D’Eusanio, Antonio Lezza, Biagio Anderlini, Daniele Malferrari, Marcello Romagnoli, Fabrizio Roncaglia

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Abstract

The increasing demand for sustainable agricultural practices aimed at reducing carbon dioxide emissions has driven the exploration of converting viticulture residues into biochar. This study investigates the potential technological applications of biochar as a filler for the production of electrically conductive composite materials, suitable to Bipolar Plate (BP) manufacturing. Grape seeds (GSs), defatted grape seeds (DGSs), wood stems (WSs), and whole grape seeds (WGSs) were converted into biochar samples through low-temperature (300 °C) pyrolysis for 3 or 24 h. The composition and thermal stability of biochar were evaluated through thermogravimetric analysis (TG), which provided valuable insights into interpreting the in-plane conductivity (IPC) values of the BP samples. Pyrolyzed GS and DGS biochar samples demonstrated enhanced thermal stability and conferred higher IPC values compared to WS counterparts. This indicates a clear correlation between the formation of carbon-rich structures during pyrolysis and overall electrical conductivity. In contrast, pyrolyzed WGSs produced BP samples with lower IPC values due to the presence of lipids, which were not effectively degraded by the low-temperature pyrolysis.

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从葡萄栽培废弃物中提取生物炭的技术前景：特性和应用前景

对旨在减少二氧化碳排放的可持续农业实践的需求日益增长，推动了将葡萄栽培残留物转化为生物炭的探索。本研究探讨了生物炭作为生产导电复合材料填料的潜在技术应用，这种材料适用于双极板（BP）制造。通过低温（300 °C）热解 3 或 24 小时，将葡萄籽（GSs）、脱脂葡萄籽（DGSs）、木茎（WSs）和整粒葡萄籽（WGSs）转化为生物炭样品。通过热重分析（TG）评估了生物炭的成分和热稳定性，这为解释 BP 样品的面内电导率（IPC）值提供了宝贵的见解。与 WS 样品相比，热解 GS 和 DGS 生物炭样品的热稳定性更强，IPC 值更高。这表明热解过程中富碳结构的形成与整体导电性之间存在明显的相关性。相比之下，热解 WGS 产生的 BP 样品 IPC 值较低，这是因为其中存在脂质，低温热解不能有效降解脂质。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Energies

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