共 41 条
Catalytic supercritical water gasification of aqueous phase directly derived from microalgae hydrothermal liquefaction
被引:32
作者:
Xu, Donghai
[1
,2
]
Liu, Liang
[1
]
Wei, Ning
[1
]
Guo, Yang
[1
]
Wang, Shuzhong
[1
]
Wu, Zhiqiang
[3
]
Duan, Peigao
[3
]
机构:
[1] Xi An Jiao Tong Univ, Sch Energy & Power Engn, Key Lab Thermofluid Sci & Engn, Minist Educ, Xian 710049, Shaanxi, Peoples R China
[2] Jiangsu Prov Acad Environm Sci, Jiangsu Prov Key Lab Environm Engn, Nanjing 210036, Jiangsu, Peoples R China
[3] Xi An Jiao Tong Univ, Sch Chem Engn & Technol, Xian 710049, Shaanxi, Peoples R China
基金:
中国国家自然科学基金;
关键词:
Supercritical water gasification;
Hydrothermal liquefaction;
Microalgae;
Aqueous phase;
Hydrogen;
Catalyst;
HYDROGEN-PRODUCTION;
BIOCRUDE FRACTIONS;
METAL-CATALYSTS;
BIOMASS;
ALGAE;
TEMPERATURE;
CONVERSION;
GLUCOSE;
METHANE;
GAS;
D O I:
10.1016/j.ijhydene.2019.08.106
中图分类号:
O64 [物理化学(理论化学)、化学物理学];
学科分类号:
070304 ;
081704 ;
摘要:
Microalgae (N. chlorella) hydrothermal liquefaction (HTL) was conducted at 320 degrees C for 30 min to directly obtain original aqueous phase with a solvent-free separation method, and then the supercritical water gasification (SCWG) experiments of the aqueous phase were performed at 450 and 500 degrees C for 10 min with different catalysts (i.e., Pt-Pd/C, Ru/C, Pd/C, Na2CO3 and NaOH). The results show that increasing temperature from 450 to 500 degrees C could improve H-2 yield and TGE (total gasification efficiency), CGE (carbon gasification efficiency), HGE (hydrogen gasification efficiency), TOC (total organic carbon) removal efficiency and tar removal efficiency. The catalytic activity order in improving the H-2 yield was NaOH > Na2CO3 > None > Pd/C > Pt-Pd/C > Ru/C. Ru/C produced the highest CH4 mole fraction, TGE, CGE, TOC removal efficiency and tar removal efficiency, while NaOH led to the highest H-2 mole fraction, H-2 yield and HGE at 500 degrees C. Increasing temperature and adding proper catalyst could remarkably improve the SCWG process above, but some N-containing compounds were difficult to be gasified. This information is valuable for guiding the treatment of the aqueous phase derived from microalgae HTL. (C) 2019 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
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页码:26181 / 26192
页数:12
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