Multiple drivers, interaction effects, and trade-offs of efficient and cleaner combustion of torrefied water hyacinth
Yükleniyor...
Dosyalar
Tarih
2021
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Elsevier
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
Developing cleaner and affordable alternatives to the sole reliance on fossil fuels has intensified efforts to improve the thermochemical conversion property of the second-generation lignocellulosic biomass. This study aimed to explore the effects of the two torrefaction temperatures (200 and 300 degrees C), the two reaction atmospheres (N-2/O-2 and CO2/O-2), and the three heating rates (5, 10, and 15 degrees C/min) on the combustion regime of water hyacinth (WH). Decomposition behaviors, reaction kinetics, thermodynamics, and mechanisms, evolved emissions and functional groups, and fuel microstructure properties were quantified. The deoxygenation and dehydration reactions acted as the main drivers of the torrefaction process, with the peak degree of deoxygenation of 8621% for WH torrefied at 300 degrees C (WH300). WH300 significantly reduced the quantity of oxygen-containing functional groups and altered the fuel microstructure properties. The order of the decomposition rates of the pseudo-components were hemicellulose > cellulose > lignin for both WH and WH torrefied at 200 degrees C (WH200) and cellulose > lignin > hemicellulose for WH300. The average activation energy fell from 197.71 to 195.71 kJ/mol for WH, 287.90 to 195.97 Itilmol for WH200, and 226.92 to 184.94 kyrnol for WH300 when the atmosphere changed from N-2/O-2 to CO2/O-2. The heating rate exerted a stronger control on their combustion behaviors than did the reaction atmosphere. CO2 , NO, and NO2 emissions dropped by 46.0, 53.1, and 65.9% for WH200 and 29.6, 42.8, and 62.5% for WH300, respectively, when compared to WH. 473.7 degrees C, 5 degrees C/min, and the CO2/O-2 atmosphere were the optimal settings for the maximized combustion efficiency. 717.1 degrees C was determined as the optimal setting for the minimized combustion emissions. Our study can yield new insights into the large-scale and cleaner combustion of the torrefied water hyacinth. (C) 2021 Elsevier B.V. All rights reserved.
Açıklama
National Natural Science Foundation of China(National Natural Science Foundation of China (NSFC)); Science and Technology Planning Project of Yunfu, Guangdong Province, China; Science and Technology Planning Project of Guangdong Province, China
Anahtar Kelimeler
Lignocellulosic Feedstock, Torrefaction, Oxy-Fuel, Oxy-Fuel Combustion, Sewage-Sludge, Pyrolysis Characteristics
Kaynak
Science of the Total Environment
WoS Q Değeri
Q1
Scopus Q Değeri
Q1
Cilt
786
Sayı
Künye
Huang, H., Liu, J., Chen, L., Evrendilek, F., Liu, H., & Chen, Z. (2021). Multiple drivers, interaction effects, and trade-offs of efficient and cleaner combustion of torrefied water hyacinth. Science of The Total Environment, 786, 147278.
