酒厂使用的谷物,咖啡粉废物及其混合物的热解
Kalidas Mainali1, Majher I Sarker1, Candice Ellison1
1Sustainable Biofuels and Co-Products Research Unit, Eastern Regional Research Center, U.S. Department of Agriculture, Agricultural Research Service, Wyndmoor, PA, USA.
概括
食品废物的联合热解,如酒厂的废谷物 (BSGs) 和咖啡土废物 (CGW),提高了生物炭的质量. 混合这些废物可以提高和碳的转化效率,为环境应用提供优质的生物炭.
科学领域:
- 废物管理 废物管理
- 材料科学 材料科学 材料科学
- 化学工程是化学工程的重要组成部分.
背景情况:
- 热解提供了一条可持续的途径,将生物可再生废物转化为有价值的生物炭.
- 了解原料相互作用对于优化热解产量和工艺控制至关重要.
- 食品废弃物,如酒厂废弃谷物 (BSGs) 和咖啡地面废物 (CGW),代表了丰富的,未得到充分利用的资源.
研究的目的:
- 为了研究BSG和CGW的共同氧化过程中的初级反应和协同效应.
- 分析从单个和混合食品废弃物原料生产的生物炭的特性.
- 探索合热化固体产品的潜在环境和能量转换应用.
主要方法:
- 热重力度分析 (TGA) 和微分热重力度分析 (DTG) 用于研究BSG,CGW及其混合物的热解行为.
- 使用富里埃变换红外光谱 (FTIR),热解气色谱/火焰电离探测器 (Py-GC/FID) 和扫描电子显微镜-能量分散光谱 (SEM-EDS) 评估生成的生物炭特征.
- 进行了共同热解实验,以评估混合原料对反应动力学和产品特性的影响.
主要成果:
- 与单个原料相比,BSG和CGW的联合热解导致生物炭质量产量仅略有变化.
- 混合原料的 (N) 和碳 (C) 转换效率明显高于单独的BSG或CGW.
- 从混合物中获得的生物炭表现出增强的特性,包括较高的总碳含量,增加的固定碳和减少的氧含量,与来自纯原料的生物炭相比.
- FTIR和Py-GC/FID分析确定了关键的功能组和产品产量,而SEM-EDS提供了对共热解生物炭表面形态和元素组成的见解.
结论:
- 酒厂废弃的谷物和咖啡地面废物的联合热解显示出协同效应,从而提高了生物炭质量.
- 混合食品废弃物可以提高和碳的转化效率,产生含有较高碳含量和较低氧含量的生物炭.
- 这些发现支持共热解的潜力,用于将食品废弃物流转化为功能生物炭,用于环境修复和能源应用.
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