Elemental migration and characterization of products during hydrothermal liquefaction of cornstalk

被引:69
作者
Zhu, Zhangbing [1 ,2 ]
Si, Buchun [1 ,2 ]
Lu, Jianwen [1 ,2 ]
Watson, Jamison [3 ]
Zhang, Yuanhui [1 ,2 ,3 ]
Liu, Zhidan [1 ,2 ]
机构
[1] China Agr Univ, Coll Water Resources & Civil Engn, Minist Agr, Lab Environm Enhancing Energy E2E, Beijing 100083, Peoples R China
[2] China Agr Univ, Coll Water Resources & Civil Engn, Minist Agr, Key Lab Agr Engn Struct & Environm, Beijing 100083, Peoples R China
[3] Univ Illinois, Dept Agr & Biol Engn, Urbana, IL 61801 USA
基金
中国国家自然科学基金;
关键词
Hydrothermal liquefaction; Cornstalk; Biorefinery; Biocrude production; Elemental migration; BIO-OIL PRODUCTION; SUBCRITICAL WATER; BARLEY STRAW; CORN STOVER; THERMOCHEMICAL LIQUEFACTION; CRUDE OIL; PRETREATMENT; BIOMASS; WOOD; MICROALGAE;
D O I
10.1016/j.biortech.2017.06.085
中图分类号
S2 [农业工程];
学科分类号
0828 ;
摘要
Biofuel production from lignocellulosic biomass through hydrothermal liquefaction (HTL) is a promising direction. This study characterized the products and investigated the elemental migration during the HTL of cornstalk at seven different operation temperatures (210-375 degrees C). The biocrude oil yield significantly increased from 7.04% (210 degrees C) to 23.32% (290 degrees C) as the temperature increased, and decreased to 21.07% when further increased to 375 degrees C. A carbon recovery of 11.03-38.69%, and a hydrogen recovery of 7.77-25.61% were achieved in the biocrude oil. Hydrogen (27.87-70.94%) and nitrogen (74.56-81.76%) were effectively recovered in the aqueous phase. GC-MS, HPLC, TGA and FT-IR analysis indicated that major organic compounds in the biocrude oil were interestingly similar between 210 degrees C and 270 degrees C. The identified compounds included hydrocarbons, esters and carboxylic acid. The calculative yields of biocrude, hydrogen, methane and biochar reached 7.04-23.32, 0.07-0.29, 7.12-12.08 and 3.01-22.42 t/100 t cornstalks, respectively. (C) 2017 Elsevier Ltd. All rights reserved.
引用
收藏
页码:9 / 16
页数:8
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