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Mn-doping Ca2Fe2O5-based oxygen carriers in chemical looping gasification of biogas residue: A comprehensive study on the reaction mechanisms

文献类型：期刊论文

作者Liu, Zibiao3; Wang, Jian3; Cao, Yan4; Tao, Junyu1; Yan, Beibei3,5; Chen, Guanyi1,2
刊名FUEL
出版日期2023-01-15
卷号332页码:12
关键词Chemical looping gasification Oxygen uncoupling Mn-doping Ca2Fe2O5-based oxygen carrier Biogas residue
ISSN号0016-2361
DOI10.1016/j.fuel.2022.126207
通讯作者Tao, Junyu(taojunyu@tju.edu.cn)
英文摘要The disposal of solid residues from the anaerobic digestion to generate biogas remains a serious challenge, which can be beneficially solved to generate the syngas based on gasification technologies. Among of them, chemical looping gasification (CLG) of biogas residues likely achieves the high-quality syngas production using the oxygen carriers (OCs). Since the nature of the solid-solid contact in CLG reactions resulting in greatly worsening reaction rates and syngas product quality, the development an oxygen-uncoupling type OCs is highly demanding. This study introduces the preparation, characterizations and performance evaluation on Bi-functional Mn/Ca2Fe2O5 oxygen carriers (OCs) achieving the oxygen-uncoupling and catalytic CO2 conversion to CO. The Mn-doping Ca2Fe2O5-based OCs with Mn in 20 mol.% (20MnCaFe) achieves an optimal gasification efficiency, carbon conversion efficiency in 72.31% and 95.72% respectively with lower CO2 yield. The intensive characterization of used OCs revealed that the proper Mn-doping helped on the increase of d-spacing, corresponding to more high-charge Mn ions and improved oxygen-ion migration and oxygen activation, and thus greater oxygen evolution reaction performance, and the incorporation of Mn in Mn/Ca2Fe2O5, leading the structural distortion of octahedral Fe-O bond and the stronger oxycarbide adsorption ability. Studies confirmed the correspondence of 20MnCaFe to its capabilities of optimal oxygen uncoupling, catalytic conversion of CO2 to CO and the coordinated oxidability, resulting in the improvement of syngas quality. A clear reaction pathway involving Mn/Ca2Fe2O5 in CLG is exhibit, that is oxygen uncoupling, CO2 catalytic conversion, the regeneration of oxygen uncoupling vacancy and finally recoverable oxygen uncoupling.
WOS关键词MAGNETIC-PROPERTIES ; GAS-PRODUCTION ; CEO2 ; REDUCTION ; FERRITE ; ACID ; PERFORMANCE ; ADSORPTION ; EFFICIENCY ; EVOLUTION
资助项目Ministry of Science and Technology of the People's Republic of China[2018YFE0111000] ; National Natural Science Foundation of China[51878557]
WOS研究方向Energy & Fuels ; Engineering
语种英语
WOS记录号WOS:001006974500001
出版者ELSEVIER SCI LTD
资助机构Ministry of Science and Technology of the People's Republic of China ; National Natural Science Foundation of China
源URL[http://ir.giec.ac.cn/handle/344007/37656]  
专题中国科学院广州能源研究所
通讯作者Tao, Junyu
作者单位1.Tianjin Univ Commerce, Sch Mech Engn, Tianjin 300134, Peoples R China
2.Preparat Off Georgia Tech Tianjin Univ, Shenzhen Inst, Shenzhen 518071, Peoples R China
3.Tianjin Univ, Sch Environm Sci & Engn, Tianjin 300350, Peoples R China
4.Chinese Acad Sci, Guangzhou Inst Energy Convers, Guangzhou 510640, Peoples R China
5.Tianjin Key Lab Biomass Wastes Utilizat, Tianjin 300350, Peoples R China
推荐引用方式
GB/T 7714		 Liu, Zibiao,Wang, Jian,Cao, Yan,et al. Mn-doping Ca2Fe2O5-based oxygen carriers in chemical looping gasification of biogas residue: A comprehensive study on the reaction mechanisms[J]. FUEL,2023,332:12.
APA Liu, Zibiao,Wang, Jian,Cao, Yan,Tao, Junyu,Yan, Beibei,&Chen, Guanyi.(2023).Mn-doping Ca2Fe2O5-based oxygen carriers in chemical looping gasification of biogas residue: A comprehensive study on the reaction mechanisms.FUEL,332,12.
MLA Liu, Zibiao,et al."Mn-doping Ca2Fe2O5-based oxygen carriers in chemical looping gasification of biogas residue: A comprehensive study on the reaction mechanisms".FUEL 332(2023):12.

入库方式： OAI收割

来源：广州能源研究所

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