Chemical looping pyrolysis-gasification of biomass for high H2/CO syngas production

被引:84
|
作者
Zeng, Jimin [1 ]
Xiao, Rui [1 ]
Zhang, Huiyan [1 ]
Wang, Yihong [1 ]
Zeng, Dewang [1 ]
Ma, Zhong [1 ]
机构
[1] Southeast Univ, Sch Energy & Environm, Minist Educ, Key Lab Energy Thermal Convers & Control, Nanjing 210096, Jiangsu, Peoples R China
基金
美国国家科学基金会; 中国国家自然科学基金;
关键词
Chemical looping pyrolysis-gasification; Biomass; High H-2/CO; Dual fluidized bed gasifier; SYNTHESIS GAS-PRODUCTION; OXYGEN CARRIER; HYDROGEN-PRODUCTION; IRON-ORE; NATURAL HEMATITE; COMBUSTION; FUEL; COAL; PERFORMANCE; CONVERSION;
D O I
10.1016/j.fuproc.2017.08.036
中图分类号
O69 [应用化学];
学科分类号
081704 ;
摘要
Chemical Looping Pyrolysis-Gasification (CLPG) of biomass is established as a novel concept for high quality syngas production. The process divides the main chemical reactions in different zones for biomass pyrolysis and gasification, then achieves residual char combustion and Oxygen Carrier (OC) regeneration consistently. The understanding of the process is first determined by calculation of possible chemical reactions using Gibbs Free Energy (Delta G). Experimental work for different effects of the fuel reactor (FR) temperature and the Steam-to Biomass Mass Ratio (S/B) are then investigated in terms of syngas components, Hydrogen to Carbon Monoxide Molar Ratio (H-2/CO), and Cold Gas Efficiency (CGE). Results show that at the FR temperature of 820 degrees C and S/B of 1.00 kg kg(-1), the optimized condition of H-2/CO and CGE are obtained at 2.45 mol mol(-1) and 61.87%, respectively. With S/B increasing from 1.25 kg kg(-1) to 2.00 kg kg(-1), the H-2/CO increases to 2.99 kg kg(-1), while the CGE decreases to 51.64%. The water-gas shift (WGS) reaction and the steam-iron reaction are approaching 0 kJ mol(-1) over the FR temperature of 820 degrees C in calculation, which confirms the contribution of these two reactions comparing with experimental tests. The research proposes an approach for efficient gasification of high volatile-content solid fuel using the advanced chemical looping technology.
引用
收藏
页码:116 / 122
页数:7
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