Department of Chemical Engineering, COMSATS University Islamabad, Lahore Campus, Defence Road, Off Raiwind Road, Lahore, 54000, Pakistan.
Department of Chemical Engineering, COMSATS University Islamabad, Lahore Campus, Defence Road, Off Raiwind Road, Lahore, 54000, Pakistan.
Chemosphere. 2022 May;295:133894. doi: 10.1016/j.chemosphere.2022.133894. Epub 2022 Feb 9.
The torrefaction of lignocellulose biomass was conducted to produce biochar with properties compatible with coal. Two lignocellulose biomasses, pearl millet (PM) and walnut shell (WS), were torrefied at different process temperatures (230-300 °C), residence times (30-90 min), and different compositional biomass blends to improve the characteristics of the biochar product. The resulting biochar product exhibited favorable changes in their properties. The pure biomasses and their blends obtained a high biochar yield (41-91%). The gross calorific value (GCV) ranged from 22 to 27 MJ/kg, showing an increase of 22-59% compared to the raw biomass. The torrefaction temperature had the most notable effect on the biochar quantity and quality. The biochar samples obtained from the torrefaction of different blends showed a higher GCV and other physicochemical characteristics than the pure biomasses. Scanning electron microscopy showed that these products might also be used for other applications.
将木质纤维素生物质进行热解以生产与煤性质兼容的生物炭。两种木质纤维素生物质，珍珠粟（PM）和核桃壳（WS），在不同的工艺温度（230-300°C）、停留时间（30-90 分钟）和不同的生物质组成混合物下进行热解，以改善生物炭产品的特性。所得生物炭产品的特性发生了有利的变化。纯生物质及其混合物获得了高的生物炭产率（41-91%）。总热值（GCV）范围为 22-27 MJ/kg，与原始生物质相比增加了 22-59%。热解温度对生物炭的数量和质量有最显著的影响。不同混合物热解得到的生物炭样品比纯生物质具有更高的 GCV 和其他物理化学特性。扫描电子显微镜表明，这些产品也可用于其他应用。
