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Selective chlorination of CaO from titania slag by CO+Cl-2 mixtures in fluidized bed
Wang, Qiao1,2; Zhu, Qingshan1; Fan, Chuanlin1; Zhang, Gengyu1,2; Li, Hongzhong1
2016-09-20
Source PublicationTHERMOCHIMICA ACTA
ISSN0040-6031
Volume640Issue:SEPPages:66-73
Abstract

This paper presents a facile approach to selectively decrease the CaO content in titania slag from 1.09 to 0.18 wt.% under a selective chlorination atmosphere of Cl-2 and CO. Thermodynamic analysis indicated that a predominance area exists to selectively chlorinate CaO with a low reduction potential. The intrinsic chlorination kinetics indicated that both the high partial pressure of chlorine and high temperature were advantageous to increase the chlorination selectivity,of CaO. Under the guidance of the thermodynamic and intrinsic kinetics, selective chlorination kinetics of CaO from titania slag were conducted at 1173-1273 K and were represented by the pore-blocking rate law. The present study indicated that a high concentration of reactant gases with a low reduction potential at high temperature could simultaneously overcome the inner mass transfer resistance while maintaining a high chlorination selectivity. The optimized partial pressures of Cl-2 and CO were 0.8 and 0.2 atm, respectively, and the temperature was 1273 K. (C) 2016 Elsevier B.V. All rights reserved.

KeywordSelective Chlorination Kinetics Titania Slag Cao Tio2 Cl-2
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1016/j.tca.2016.07.022
Indexed BySCI
Language英语
WOS KeywordLOW-TEMPERATURE ; ILMENITE ; KINETICS ; EXTRACTION ; RUTILE ; MODEL ; CARBOCHLORINATION ; BENEFICIATION ; PARTICLES ; CHLORIDE
WOS Research AreaThermodynamics ; Chemistry
WOS SubjectThermodynamics ; Chemistry, Analytical ; Chemistry, Physical
Funding OrganizationNSFC Distinguished Young Scholar(21325628)
WOS IDWOS:000383934600009
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/21339
Collection多相复杂系统国家重点实验室
Affiliation1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, POB 353, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Wang, Qiao,Zhu, Qingshan,Fan, Chuanlin,et al. Selective chlorination of CaO from titania slag by CO+Cl-2 mixtures in fluidized bed[J]. THERMOCHIMICA ACTA,2016,640(SEP):66-73.
APA Wang, Qiao,Zhu, Qingshan,Fan, Chuanlin,Zhang, Gengyu,&Li, Hongzhong.(2016).Selective chlorination of CaO from titania slag by CO+Cl-2 mixtures in fluidized bed.THERMOCHIMICA ACTA,640(SEP),66-73.
MLA Wang, Qiao,et al."Selective chlorination of CaO from titania slag by CO+Cl-2 mixtures in fluidized bed".THERMOCHIMICA ACTA 640.SEP(2016):66-73.
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