Characteristics of rice husk biochar briquettes with municipal solid waste cassava, sweet potato and matooke peelings as binders

IF 3.6 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials for Renewable and Sustainable Energy Pub Date : 2024-05-15 DOI:10.1007/s40243-024-00262-x

Michael Lubwama, Agatha Birungi, Andrew Nuwamanya, Vianney Andrew Yiga

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Abstract

Rice husks are not readily biodegradable making their disposal challenging due to the common disposal method of open burning which has negative environmental effects. Additionally, banana, sweet potato and cassava peelings form a large percentage of organic municipal solid waste. Therefore, this study developed rice husk biochar briquettes with organic municipal peelings waste as binders. Rice husks biochar was formed via carbonization processes in a step-down kiln at temperatures ranging between 400 and 500 °C. Organic binders were mixed with the rice husk biochar at different ratios of 10% and 15% before being compacted at a pressure ≤ 7 MPa into briquettes. Thermogravimetric results showed that the developed briquettes had high ash contents ranging from 44% to 47%. Rice husk biochar briquettes with the highest particle density were observed for briquettes with 15% cassava peel binder at 427.1 kg/m³. The highest HHV and maximum attainable flame temperature of 21.75 MJ/kg and 828.7 °C were obtained for rice husk biochar briquettes with 15% matooke peeling organic binder. For all rice husk biochar briquettes, increasing the organic peeling binder had a positive impact of reducing the ash content, while at the same time increasing the peak temperatures, thus contributing to their enhanced thermal stability.

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以城市固体废弃物木薯、甘薯和马铃薯皮为粘合剂的稻壳生物炭块的特性

稻壳不容易被生物降解，因此处理稻壳很困难，通常的处理方法是露天焚烧，这对环境有负面影响。此外，香蕉、甘薯和木薯皮在城市有机固体废物中占很大比例。因此，本研究以城市有机果皮废物为粘合剂，开发了稻壳生物炭砖。稻壳生物炭是在温度介于 400 至 500 °C 之间的降压窑中通过碳化过程形成的。有机粘合剂以 10% 和 15% 的不同比例与稻壳生物炭混合，然后在压力 ≤ 7 兆帕的条件下压制成压块。热重测定结果表明，制得的压块灰分含量较高，在 44% 至 47% 之间。木薯皮粘合剂含量为 15%的稻壳生物炭压块的颗粒密度最高，为 427.1 kg/m3。使用 15% 木薯皮有机粘合剂的稻壳生物炭块的 HHV 和最高火焰温度分别为 21.75 兆焦耳/千克和 828.7 摄氏度。对所有稻壳生物炭块而言，增加有机去皮粘合剂对降低灰分含量有积极影响，同时还能提高峰值温度，从而有助于增强其热稳定性。

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来源期刊

Materials for Renewable and Sustainable Energy MATERIALS SCIENCE, MULTIDISCIPLINARY-

CiteScore

7.90

自引率

2.20%

发文量

审稿时长

13 weeks

期刊介绍： Energy is the single most valuable resource for human activity and the basis for all human progress. Materials play a key role in enabling technologies that can offer promising solutions to achieve renewable and sustainable energy pathways for the future. Materials for Renewable and Sustainable Energy has been established to be the world''s foremost interdisciplinary forum for publication of research on all aspects of the study of materials for the deployment of renewable and sustainable energy technologies. The journal covers experimental and theoretical aspects of materials and prototype devices for sustainable energy conversion, storage, and saving, together with materials needed for renewable fuel production. It publishes reviews, original research articles, rapid communications, and perspectives. All manuscripts are peer-reviewed for scientific quality. Topics include: 1. MATERIALS for renewable energy storage and conversion: Batteries, Supercapacitors, Fuel cells, Hydrogen storage, and Photovoltaics and solar cells. 2. MATERIALS for renewable and sustainable fuel production: Hydrogen production and fuel generation from renewables (catalysis), Solar-driven reactions to hydrogen and fuels from renewables (photocatalysis), Biofuels, and Carbon dioxide sequestration and conversion. 3. MATERIALS for energy saving: Thermoelectrics, Novel illumination sources for efficient lighting, and Energy saving in buildings. 4. MATERIALS modeling and theoretical aspects. 5. Advanced characterization techniques of MATERIALS Materials for Renewable and Sustainable Energy is committed to upholding the integrity of the scientific record. As a member of the Committee on Publication Ethics (COPE) the journal will follow the COPE guidelines on how to deal with potential acts of misconduct. Authors should refrain from misrepresenting research results which could damage the trust in the journal and ultimately the entire scientific endeavor. Maintaining integrity of the research and its presentation can be achieved by following the rules of good scientific practice as detailed here: https://www.springer.com/us/editorial-policies