Bridging the relationship between hydrothermal pretreatment and co-pyrolysis: Effect of hydrothermal pretreatment on aromatic production

被引:55
作者
Dai, Leilei [1 ,2 ]
Wang, Yunpu [1 ,2 ]
Liu, Yuhuan [1 ,2 ]
Ruan, Roger [1 ,2 ,3 ,4 ]
He, Chao [5 ]
Duan, Dengle [1 ,2 ]
Zhao, Yunfeng [1 ,2 ]
Yu, Zhenting [1 ,2 ]
Jiang, Lin [1 ,2 ]
Wu, Qiuhao [1 ,2 ]
机构
[1] Nanchang Univ, State Key Lab Food Sci & Technol, Nanchang 330047, Jiangxi, Peoples R China
[2] Nanchang Univ, Minist Educ, Engn Res Ctr Biomass Convers, Nanchang 330047, Jiangxi, Peoples R China
[3] Univ Minnesota, Ctr Biorefining, 1390 Eckles Ave, St Paul, MN 55108 USA
[4] Univ Minnesota, Dept Bioprod & Biosyst Engn, 1390 Eckles Ave, St Paul, MN 55108 USA
[5] Sun Yat Sen Univ, Sch Environm Sci & Engn, Guangzhou 510275, Guangdong, Peoples R China
基金
中国国家自然科学基金;
关键词
Hydrothermal pretreatment; Catalytic co-pyrolysis; Biomass; Polyethylene; Aromatic; CATALYTIC FAST PYROLYSIS; BIO-OIL; PHYSICOCHEMICAL PROPERTIES; LIGNOCELLULOSIC BIOMASS; WET TORREFACTION; CELLULOSE; WOOD; BEHAVIOR; HYDROCARBONS; PLASTICS;
D O I
10.1016/j.enconman.2018.10.079
中图分类号
O414.1 [热力学];
学科分类号
摘要
The effect of hydrothermal pretreatment (HTP) on the biomass structure and aromatic production in the catalytic co-pyrolysis process was investigated in this study. Fundamental characteristic analysis indicated that HTP removed most of the hemicellulose and some oxygen, enhancing the hydrogen-to-carbon effective ratio (H/Ceff) of biomass. X-ray diffraction, Fourier-transform infrared spectroscopy, and solid-state cross-polarization magic angle spinning carbon-13 nuclear magnetic resonance analysis revealed that HTP mainly interrupted unstable chemical bonds (acetyl groups, glycosidic bonds, and ether linkage in lignin) and changed the biomass crystallinity. Furthermore, HTP remarkably removed alkalis and alkali earth metals (AAEM) from the biomass. To determine the effect of HTP on co-pyrolysis, individual pyrolysis of raw and pretreated corncob was carried out. Results showed that HTP significantly enhanced yields of levoglucosans and furans, both of which are important intermediates for aromatic formation during co-pyrolysis. HTP remarkably increased the aromatic contents of bio-oil in the co-pyrolysis of different corncob samples and polyethylene. The influence of HTP on aromatic production mainly included AAEM removal, hemicellulose decomposition, furan formation, and H/Ceff increments in the pretreated biomass. Thus, HTP has great potential in improving aromatic production during co pyrolysis of biomass and polyethylene.
引用
收藏
页码:36 / 43
页数:8
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