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Energetic characterization and flash pyrolysis of different elephant grass cultivars (Pennisetum purpureum Schum.)
The Canadian Journal of Chemical Engineering ( IF 2.1 ) Pub Date : 2021-08-27 , DOI: 10.1002/cjce.24309
Mayara O. Lessa 1 , Guilherme Q. Calixto 1 , Bruna M. E. Chagas 2 , Emerson M. Aguiar 3 , Marcus A. F. Melo 4 , Renata M. Braga 3
Affiliation  

Limited fossil fuel reserves combined with greenhouse gas intensification due to CO2 emissions has encouraged research in renewable fuels. In this work, a flash pyrolysis study of elephant grass cultivars—Pennisetum purpureum Schum cultivar Mott (MEG), P. purpureum Schum cultivar Roxo (REG), and P. purpureum Schum cultivar Capiaçu (CEG)—was carried out. The biomasses were evaluated in terms of energy characterization by proximate and ultimate analysis, thermogravimetric analyses (TG/DTG), X-ray diffraction (XRD), Fourier transform infrared (FTIR), and analytical pyrolysis (Py-GC/MS) at 600°C. The characterization results showed that these biomasses have potential for energy applications and to produce valuable chemicals. The pyrolysis products produced were mainly oxygenated, including short-chain organic acids (C1-C4), furans, esters, aldehydes, ketone, and phenols. Although the obtained results were similar for the three biomasses with small variations in the yields of the pyrolysis products, the study reveals an important difference in terms of energy density. CEG was proven as the most promising elephant grass cultivar to be applied for fast pyrolysis to obtain bio-oil due to its higher dry matter production (2115 t km−2), power generated (9529 MWh km−2), HHV (16.22 MJ kg−1), lower ash content (6.75%), higher volatile content (74.84%), and higher carbon content (42.57%).

中文翻译:

不同象草品种(Pennisetum purpureum Schum.)的能量表征和快速热解

有限的化石燃料储量加上因 CO 2排放而导致的温室气体强化,鼓励了对可再生燃料的研究。在这项工作中,对象草品种的快速热解研究 - Pennisetum purpureum Schum cultivar Mott (MEG)、P. purpureum Schum cultivar Roxo (REG) 和P. purpureum进行了 Schum 栽培品种 Capiaçu (CEG)。通过近似和最终分析、热重分析 (TG/DTG)、X 射线衍射 (XRD)、傅里叶变换红外 (FTIR) 和分析热解 (Py-GC/MS) 在 600摄氏度。表征结果表明,这些生物质在能源应用和生产有价值的化学品方面具有潜力。产生的热解产物主要是含氧的,包括短链有机酸(C 1 -C 4)、呋喃、酯、醛、酮和酚。尽管三种生物质的所得结果相似,热解产物的产量差异很小,但该研究揭示了能量密度方面的重要差异。CEG 因其较高的干物质产量(2115 t km -2)、发电量(9529 MWh km -2)、HHV(16.22 MJ)被证明是最有希望用于快速热解以获得生物油的象草品种kg -1 )、较低的灰分含量 (6.75%)、较高的挥发分含量 (74.84%) 和较高的碳含量 (42.57%)。
更新日期:2021-08-27
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