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Ca-enhanced hematite oxygen carriers for chemical looping reforming of biomass pyrolyzed gas coupled with CO2 splitting

文献类型：期刊论文

作者Wei, Guo-qiang2,3,4,5; Feng, Jie2; Hou, Ya-Lei1; Li, Fang-Zhou2; Li, Wen-Ying2; Huang, Zhen3; Zheng, An-qing3; Li, Hai-bin3
刊名FUEL
出版日期2021-02-01
卷号285页码:10
ISSN号0016-2361
关键词Biomass pyrolyzed gases Chemical looping reforming Ca-modified hematite oxygen carriers Ca2Fe2O5 CO2 splitting
DOI10.1016/j.fuel.2020.119125
通讯作者Feng, Jie(fengjie@tyut.edu.cn) ; Li, Wen-Ying(ying@tyut.edu.cn)
英文摘要Chemical looping reforming (CLR) of biomass pyrolyzed gases coupled with CO2 splitting was proposed to improve the H-2/CO ratio of gaseous product by using Ca-enhanced hematite oxygen carriers. The oxygen carriers mainly consist of Fe2O3, Ca2Fe2O5, CaO and SiO2. The impurity gas in biomass pyrolyzed gases is consumed in CLR stage, attributing to the dry reforming reaction over a catalytic effect of oxygen carriers. The highest CH4 conversion 98.26% and CO2 conversion 71.92% are realized in the CLR process with the crystal transformation of Fe2O3 and Ca2Fe2O5 to Fe and CaO. The improved reactivity of hematite oxygen carriers by CaO is mainly ascribed to the intermetallic synergistic effect in Ca2Fe2O5, which influences the lattice oxygen release and selectivity of gaseous products. The maximum H-2/CO ratio of gaseous product in CLR process is nearly 3 times as high as the initial H-2/CO ratio of biomass pyrolyzed gas. Moreover, up to 80.95% CO2 conversion efficiency and 2.32 mmol/min/g CO yield are achieved in CO2 splitting step with the generation of Fe3O4 and CaFe3O5 in oxygen carriers. The CO2 conversion shows positive correlation with reaction temperature but negative correlation with weight hourly space velocity. The metallic synergistic effect between Ca/Fe are conductive to improve CO2 conversion though shifting the reaction equilibrium and enhancing ion diffusion. Modest reactivity and stability of Ca-modified oxygen carriers are confirmed in 15 cycles reaction, which indicates that potentially application prospect in CLR of biomass pyrolyzed gases coupled with CO2 splitting process.
WOS关键词HYDROGEN-PRODUCTION ; GASIFICATION ; COAL ; CONVERSION ; PERFORMANCE ; FERRITE ; LIGNITE ; CHAR
资助项目National Natural Science Foundation of China[51976226] ; National Natural Science Foundation of China[51776133] ; Cooperation fund of Dalian National Laboratory for Clean Energy, Chinese Academy of Sciences[DNL180205] ; Natural Science Foundation of Guangdong Province[2018A0303130012] ; Science & Technology Research Project of Guangdong Province[2015A020215023] ; Science & Technology Project of Guangzhou[201707010202]
WOS研究方向Energy & Fuels ; Engineering
语种英语
出版者ELSEVIER SCI LTD
WOS记录号WOS:000588132400080
资助机构National Natural Science Foundation of China ; Cooperation fund of Dalian National Laboratory for Clean Energy, Chinese Academy of Sciences ; Natural Science Foundation of Guangdong Province ; Science & Technology Research Project of Guangdong Province ; Science & Technology Project of Guangzhou
源URL[http://ir.giec.ac.cn/handle/344007/32409]  
专题中国科学院广州能源研究所
通讯作者Feng, Jie; Li, Wen-Ying
作者单位1.Guangdong Commun Polytech, Guangzhou 510800, Peoples R China
2.Taiyuan Univ Technol, Training Base State Key Lab Coal Sci & Technol Jo, Taiyuan 030024, Peoples R China
3.Chinese Acad Sci, Guangzhou Inst Energy Convers, Guangzhou 510640, Peoples R China
4.CAS Key Lab Renewable Energy, Guangzhou 510640, Peoples R China
5.Guangdong Prov Key Lab New & Renewable Energy Res, Guangzhou 510640, Peoples R China
推荐引用方式
GB/T 7714		 Wei, Guo-qiang,Feng, Jie,Hou, Ya-Lei,et al. Ca-enhanced hematite oxygen carriers for chemical looping reforming of biomass pyrolyzed gas coupled with CO2 splitting[J]. FUEL,2021,285:10.
APA Wei, Guo-qiang.,Feng, Jie.,Hou, Ya-Lei.,Li, Fang-Zhou.,Li, Wen-Ying.,...&Li, Hai-bin.(2021).Ca-enhanced hematite oxygen carriers for chemical looping reforming of biomass pyrolyzed gas coupled with CO2 splitting.FUEL,285,10.
MLA Wei, Guo-qiang,et al."Ca-enhanced hematite oxygen carriers for chemical looping reforming of biomass pyrolyzed gas coupled with CO2 splitting".FUEL 285(2021):10.

入库方式： OAI收割

来源：广州能源研究所

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