Characterization of biofuel production from hydrothermal treatment of hyperaccumulator waste (Pteris vittata L.) in sub- and supercritical water

被引:28
作者
Chen, Jinbo [1 ]
Li, Songmao [1 ]
机构
[1] Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, Ningbo 315201, Peoples R China
关键词
BIO-OIL PRODUCTION; BARLEY STRAW; THERMOCHEMICAL CONVERSION; LIQUEFACTION HTL; SEWAGE-SLUDGE; BIOMASS; TEMPERATURE; GASIFICATION; LIGNIN; FUEL;
D O I
10.1039/c9ra09410e
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
In this study, hyperaccumulator waste, i.e., Pteris vittata L. was converted into bio-oil, biogas and biochar via sub- and supercritical hydrothermal liquefaction processes. These products were characterized in terms of EI/MS, FTIR, TGA and GC to understand their chemical composition, thermal decomposition, structural properties and high biofuel reactivity. Characterization results revealed that the dominant chemical components in the heavy bio-oil were esters (40.22%), phenols (20.02%), alcohols (10.16%), organic acids (9.07%), nitrogenous compounds (8.83%) and ketones/aldehydes (6.42%), while the light oil was rich with a higher fraction of phenols (54.13%) and nitrogenous compounds (27.04%). Particularly, bio-oils obtained from supercritical conditions contained increased phenolic compounds and reduced oxygenated chemicals such as alcohols, aliphatic acid, ketones and aldehydes, suggesting the improved quality of bio-oil due to the reduction in oxygen contents. Meanwhile, H-2-rich syngas production with the H-2 yield of 38.87% was obtained at 535 degrees C for 20 min, and higher reaction temperature presented a positive influence on H-2 production during Pteris vittata L. liquefaction. Moreover, the remaining biochar product was analyzed to determine whether it could be used as a direct solid fuel or auxiliary fuel. This study provided full exploitation of this feedstock waste in energy and valuable chemical complexes.
引用
收藏
页码:2160 / 2169
页数:10
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