Syngas production from lignite via chemical looping gasification with hematite oxygen carrier enhanced by exogenous metals

doi:10.1016/j.fuel.2022.124119

GIEC OpenIR

	Syngas production from lignite via chemical looping gasification with hematite oxygen carrier enhanced by exogenous metals
	Wei, Guoqiang 1,2; Yang, Ming 2; Huang, Zhen 2; Bai, Hongcun 1; Chang, Guozhang 1; He, Fang3 ; Yi, Qun 4; Huang, Yi 4; Zheng, Anqing2 ; Zhao, Kun2 ; Lin, Yan 2
	2022-08-01
发表期刊	FUEL
ISSN	0016-2361
卷号	321 页码:9
通讯作者	Huang, Zhen(huangzhen@ms.giec.ac.cn)
摘要	Chemical looping gasification (CLG) has revealed advantages in the preparation of high-quality syngas and reduction of carbon dioxide. Hematite oxygen carriers (OCs) enhanced by exogenous active metals were investigated in CLG process of lignite by using TG and fixed bed reactor with various analytical methods. The experimental results indicated that Fe2O3 in hematite reacts with different exogenous metals to generate mixed oxide such as CaFe2O5, NiFe2O4, CeFeO3 and CoFe2O4, increasing oxygen vacancy concentration, strengthening lattice oxygen transfer, and improving the conversion efficiency of lignite. The CaO exhibited the best reaction performance among exogenous metals in promoting lignite CLG process with a reactivity order of CaO > CeO2 > NiO > Co2O3. The CaO enhanced the CLG reaction through two pathways. The synergistic effect in CaFe(2)O(5 )reduce the Fe-O bonds intensities, promoting the migration of lattice oxygen in OCs. Carbonation of CaO sorbents shifts the CLG reaction equilibrium towards syngas, which are conductive to improvement of the syngas yield. Water molecular played an important role in promoting carbon conversion, regulating H-2/CO ratio, and reducing calcium loss. Synthesis gas with H-2 concentration 63.19%, heating value 9.20 MJ/m(3) and H-2/CO ratio 5.77 corresponding to carbon conversion efficiency 66.41% and syngas yield 2.56 m3/kg was achieved in CLG of lignite with water participation. The main reaction path of Fe2O3-CaFe2O5-CaFe2O5/Fe2.91O4-*Fe(2)O(3)was revealed for CaO modified hematite OCs in CLG process. The main crystal form and lattice oxygen of OCs were regenerated with the improvement of particle size and pore channels. The experimental results indicate a potential application of modified hematite OCs in the CLG of lignite.
关键词	Lignite Exogenous metals CLG Hematite Oxygen carrier Synthesis gas
DOI	10.1016/j.fuel.2022.124119
关键词[WOS]	HYDROGEN GENERATION ; COAL-GASIFICATION ; CALCIUM FERRITE ; GAS-PRODUCTION ; COMBUSTION ; CO2 ; PERFORMANCE ; OXIDES ; STEAM ; CHAR
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[U1810125] ; National Natural Science Foundation of China[51976226] ; National Natural Science Foundation of China[51776133] ; Joint Fund of the Yulin University ; Dalian National Laboratory for Clean Energy[2021021] ; Foundation of State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering[2020-KF-04] ; Youth Innovation Promotion Association, CAS[2018384]
WOS研究方向	Energy & Fuels ; Engineering
项目资助者	National Natural Science Foundation of China ; Joint Fund of the Yulin University ; Dalian National Laboratory for Clean Energy ; Foundation of State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering ; Youth Innovation Promotion Association, CAS
WOS类目	Energy & Fuels ; Engineering, Chemical
WOS记录号	WOS:000799809800003
出版者	ELSEVIER SCI LTD
引用统计	被引频次：8[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/344007/36730
专题	中国科学院广州能源研究所
通讯作者	Huang, Zhen
作者单位	1.Ningxia Univ, Sch Chem & Chem Engn, State Key Lab High Efficiency Utilizat Coal & Gre, Yinchuan 750021, Ningxia, Peoples R China 2.Chinese Acad Sci, Guangzhou Inst Energy Convers, Guangzhou 510640, Peoples R China 3.Guilin Univ Technol, Coll Chem & Bioengn, Guilin 541004, Peoples R China 4.Wuhan Inst Technol, Key Lab Green Chem Engn Proc, Minist Educ, Wuhan 430205, Peoples R China
第一作者单位	中国科学院广州能源研究所
推荐引用方式 GB/T 7714	Wei, Guoqiang,Yang, Ming,Huang, Zhen,et al. Syngas production from lignite via chemical looping gasification with hematite oxygen carrier enhanced by exogenous metals[J]. FUEL,2022,321:9.
APA	Wei, Guoqiang.,Yang, Ming.,Huang, Zhen.,Bai, Hongcun.,Chang, Guozhang.,...&Lin, Yan.(2022).Syngas production from lignite via chemical looping gasification with hematite oxygen carrier enhanced by exogenous metals.FUEL,321,9.
MLA	Wei, Guoqiang,et al."Syngas production from lignite via chemical looping gasification with hematite oxygen carrier enhanced by exogenous metals".FUEL 321(2022):9.