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Thermodynamic analysis and thermogravimetric investigation on chemical looping gasification of biomass char under different atmospheres with Fe2O3 oxygen carrier
Huang, Zhen1,2; He, Fang1; Zhu, Huangqing2; Chen, Dezhen2; Zhao, Kun1; Wei, Guoqiang1; Feng, Yipeng1; Zheng, Anqing1; Zhao, Zengli1; Li, Haibin1
2015-11-01
发表期刊APPLIED ENERGY
卷号157
摘要Chemical looping gasification (CLG) is viewed as a promising gasification technology because gas phase oxygen of gasifying medium can be replaced by lattice oxygen of oxygen carrier. In the present work, the reactivity of biomass char with Fe2O3 oxygen carrier under different atmospheres was detailed investigated through the thermodynamic and thermo-gravimetric analysis. The Fe2O3 was almost completely reduced into metallic iron when the reaction temperature exceeded 1000 degrees C, but the carbon conversion of char only attained to 40.80% due to the lack of oxygen source under inert atmosphere. However, the carbon conversion of char apparently increased and the oxygen conversion of oxygen carrier dramatically decreased under oxidizing atmosphere (CO2, or H2O). It is attributed to the fact that oxidizing agents can supply oxygen sources to promote char conversion as well as to alleviate the reduction of oxygen carrier. These thermodynamic predictions were confirmed by TGA tests, where the char was fully converted into gas under CO2, or H2O atmosphere because of enough oxygen sources but a low carbon conversion was obtained under inert atmosphere. TGA results further indicated that the reactivity of char with oxygen carrier under steam atmosphere is much higher than that under CO2 atmosphere and the Fe2O3 phase is mainly reduced into Fe3O4 phase in all the tests. Additionally, several other different carriers (Al2O3, NiO-modified iron ore and NiO) were employed to compare the reactivity of iron ore as well. The order of reactivity is speculated as follows: Pure oxygen approximate to NiO > H2O > Iron ore > CO2 > Al2O3. The reduced oxygen carrier can recover entire lattice oxygen [O] to its initial state under air atmosphere. Therefore, it suggests that the Fe2O3 material used as an oxygen carrier can be recycled in the process of char CLG. (C) 2015 Elsevier Ltd. All rights reserved.
文章类型Article
关键词Thermodynamic Analysis Biomass Char Chemical Looping Gasification (Clg) Different Atmospheres Fe2o3
WOS标题词Science & Technology ; Technology
DOI10.1016/j.apenergy.2015.03.033
研究领域[WOS]Energy & Fuels ; Engineering
关键词[WOS]SYNTHESIS GAS-PRODUCTION ; FLUIDIZED-BED ; IRON-ORE ; STEAM GASIFICATION ; WOODY BIOMASS ; COMBUSTION ; COAL ; HYDROGEN ; REACTOR ; PERFORMANCE
收录类别SCI
语种英语
WOS类目Energy & Fuels ; Engineering, Chemical
WOS记录号WOS:000364249200055
引用统计
被引频次:18[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.giec.ac.cn/handle/344007/10889
专题中国科学院广州能源研究所
作者单位1.Chinese Acad Sci, Guangzhou Inst Energy Convers, Chinese Acad Sci CAS Key Lab Renewable Energy, Guangzhou, Peoples R China
2.Tongji Univ, Thermal & Environm Engn Inst, Yangpu, Peoples R China
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Huang, Zhen,He, Fang,Zhu, Huangqing,et al. Thermodynamic analysis and thermogravimetric investigation on chemical looping gasification of biomass char under different atmospheres with Fe2O3 oxygen carrier[J]. APPLIED ENERGY,2015,157.
APA Huang, Zhen.,He, Fang.,Zhu, Huangqing.,Chen, Dezhen.,Zhao, Kun.,...&Li, Haibin.(2015).Thermodynamic analysis and thermogravimetric investigation on chemical looping gasification of biomass char under different atmospheres with Fe2O3 oxygen carrier.APPLIED ENERGY,157.
MLA Huang, Zhen,et al."Thermodynamic analysis and thermogravimetric investigation on chemical looping gasification of biomass char under different atmospheres with Fe2O3 oxygen carrier".APPLIED ENERGY 157(2015).
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