A novel force balance model for predicting defluidization of ilmenite in a fluidized bed reactor

doi:10.1016/j.cej.2022.140112

CAS OpenIR

	A novel force balance model for predicting defluidization of ilmenite in a fluidized bed reactor
	Zhang, Xu1,2 ; Li, Jun 1; Zou, Zheng 1; Zhang, Huigang 1; Yan, Dong1 ; Du, Zhan 1; Xie, Zhaohui 1; Zhu, Qingshan 1,2
	2023-02-15
Source Publication	CHEMICAL ENGINEERING JOURNAL
ISSN	1385-8947
Volume	454 Pages:10
Abstract	Ilmenite particles are readily defluidized when they are reduced in a fluidized bed reactor because nano-micro iron nuclei that precipitate on the particle surface are adhesive and tend to aggregate. We propose herein a novel force balance model with which to predict defluidization phenomena. This model is based on the particle cohesion force comprising the sum of the cohesion forces for surface asperities. As the surface coverage of iron particles increases with the extent of reduction, the cohesion forces of the particles gradually increase and eventually trigger defluidization. The surface coverage predicted by the model agrees well with experimental results for 88.4 - 154.7 mu m particles and the temperature range 700 - 850 degrees C. The new force balance model reveals that particle size, sphericity, and temperature play key roles in defluidization of ilmenite during reduction. Defluidization occurs readily for fine and irregular particles, especially at high temperatures. Our model combines asperity, surface coverage, and particle sphericity to make a more general prediction.
Keyword	Reduction Ilmenite Defluidization Surface coverage Sphericity
DOI	10.1016/j.cej.2022.140112
Language	英语
WOS Keyword	IRON PARTICLES ; GAS ; AGGLOMERATION ; REDUCTION ; MECHANISM ; NANOPARTICLES ; BEHAVIORS ; POWDERS
Funding Project	National Natural Science Foundation of China ; Fund of State Key Laboratory of Multiphase complex systems ; [21736010] ; [21978300] ; [MPCS-2019-A-06]
WOS Research Area	Engineering
WOS Subject	Engineering, Environmental ; Engineering, Chemical
Funding Organization	National Natural Science Foundation of China ; Fund of State Key Laboratory of Multiphase complex systems
WOS ID	WOS:000913199000004
Publisher	ELSEVIER SCIENCE SA
Citation statistics
Document Type	期刊论文
Identifier	http://ir.ipe.ac.cn/handle/122111/56759
Collection	中国科学院过程工程研究所
Corresponding Author	Li, Jun; Zhu, Qingshan
Affiliation	1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China 2.Univ Chinese Acad Sci, Sch Chem Engn, Beijing 100049, Peoples R China
First Author Affilication	Center of lonic Liquids and Green Engineering
Corresponding Author Affilication	Center of lonic Liquids and Green Engineering
Recommended Citation GB/T 7714	Zhang, Xu,Li, Jun,Zou, Zheng,et al. A novel force balance model for predicting defluidization of ilmenite in a fluidized bed reactor[J]. CHEMICAL ENGINEERING JOURNAL,2023,454:10.
APA	Zhang, Xu.,Li, Jun.,Zou, Zheng.,Zhang, Huigang.,Yan, Dong.,...&Zhu, Qingshan.(2023).A novel force balance model for predicting defluidization of ilmenite in a fluidized bed reactor.CHEMICAL ENGINEERING JOURNAL,454,10.
MLA	Zhang, Xu,et al."A novel force balance model for predicting defluidization of ilmenite in a fluidized bed reactor".CHEMICAL ENGINEERING JOURNAL 454(2023):10.

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