Facultad de Ingeniería, Universidad del Valle, Ciudad Universitaria Meléndez, Cali, Colombia.
Faculty of Engineering, University of Nottingham, University Park, UK.
Bioengineered. 2023 Dec;14(1):2283264. doi: 10.1080/21655979.2023.2283264. Epub 2023 Nov 20.
The Colombian sugarcane industry yields significant residues, categorized as agricultural and industrial. While bagasse, a widely studied industrial residue, is employed for energy recovery through combustion, agricultural residues are often left in fields. This study assesses the combustion behavior of these residues in typical collection scenarios. Additionally, it encompasses the characterization of residues from genetically modified sugarcane varieties in Colombia, potentially exhibiting distinct properties not previously documented. Non-isothermal thermogravimetrical analysis was employed to study the thermal behavior of sugarcane industrial residues (bagasse and pith) alongside agricultural residues from two different sugarcane varieties. This facilitated the determination of combustion reactivity through characteristic combustion process temperatures and technical parameters like ignition and combustion indexes. Proximate, elemental, and biochemical analyses revealed slight compositional differences. Agricultural residues demonstrated higher ash content (up to 34%) due to foreign matter adhering during harvesting, as well as soil and mud attachment during collection. Lignin content also varied, being lower for bagasse and pith, attributed to the juice extraction and milling processes that remove soluble lignin. Thermogravimetric analysis unveiled a two-stage burning process in all samples: devolatilization and char formation (170°C), followed by char combustion (310°C). Characteristic temperatures displayed subtle differences, with agricultural residues exhibiting lower temperatures and decomposition rates, resulting in reduced ignition and combustion indexes. This indicates heightened combustion reactivity in industrial residues, attributed to their elevated oxygen percentage, leading to more reactive functional groups and greater combustion stability compared to agricultural residues. This information is pertinent for optimizing sugarcane residues utilization in energy applications.
哥伦比亚的甘蔗产业产生了大量的残留物，可分为农业和工业残留物。虽然蔗渣是一种广泛研究的工业残留物，可通过燃烧用于能源回收，但农业残留物通常留在田间。本研究评估了这些残留物在典型收集场景中的燃烧行为。此外，它还包括对哥伦比亚转基因甘蔗品种的残留物进行特征描述，这些品种可能具有以前未记录的独特特性。非等温热重分析用于研究甘蔗工业残留物（蔗渣和髓）以及两种不同甘蔗品种的农业残留物的热行为。这通过特征燃烧过程温度和技术参数（如点火和燃烧指数）来确定燃烧反应性。近似分析、元素分析和生物化学分析揭示了轻微的组成差异。农业残留物由于在收获过程中附着的外来物质以及在收集过程中附着的土壤和泥浆，其灰分含量（高达 34%）更高。木质素含量也有所不同，蔗渣和髓中的木质素含量较低，这归因于提取汁液和碾磨过程去除了可溶性木质素。热重分析揭示了所有样品中的两阶段燃烧过程：挥发和炭形成（170°C），然后是炭燃烧（310°C）。特征温度显示出细微差异，农业残留物的温度和分解速率较低，导致点火和燃烧指数降低。这表明工业残留物的燃烧反应性更高，这归因于其较高的氧百分比，导致与农业残留物相比，具有更多反应性的官能团和更大的燃烧稳定性。这些信息对于优化甘蔗残留物在能源应用中的利用具有重要意义。
