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Process Simulation of Sulfuric Acid Recovery by Azeotropic Distillation: Vapor-Liquid Equilibria and Thermodynamic Modeling
Alternative TitleInd. Eng. Chem. Res.
Li, Geng1; Asselin, Edouard2; Li, Zhibao1
2014-07-23
Source PublicationINDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
ISSN0888-5885
Volume53Issue:29Pages:11794-11804
AbstractFor development of the new process for the recovery of dilute sulfuric acid by azeotropic distillation proposed in our earlier publication [Li et al., hid. Eng. Chem. Res., 2013, 52, 3481-3489], in this paper, the vapor-liquid equilibria (VLE) for the FeSO4 + H2O and H2SO4 + FeSO4 + H2O systems were first determined by the quasi-static ebulliometric method. The azeotropic temperatures of the H2SO4 + H2O + entrainer (cyclohexane and octane) systems were also measured. The corresponding electrolyte nonrandom two-liquid interaction parameters were obtained by regressing the experimental data with a maximum average absolute deviation of boiling points of 0.83 K. The model with newly obtained parameters was verified by comparing its prediction with the experimental azeotropic temperature for the H2SO4 + FeSO4 + H2O + C6H12 quaternary system. The temperature and sulfuric acid concentration ranges of the study were 305.9-396.9 K and 0-86.1 wt %, respectively. Following from the experimental results, semicontinuous distillation experiments for the sulfuric acid recovery were performed with cyclohexane as the entrainer. Equipped with the new parameters, Aspen Plus was adopted to carry out the process simulation for the recovery of dilute sulfuric acid by azeotropic distillation. The simulation results show that when cyclohexane was employed as the entrainer, the dilute sulfuric acid can be concentrated to 68% by a packed column containing 4 theoretical stages and with a reboiler temperature of only 361 K.; For development of the new process for the recovery of dilute sulfuric acid by azeotropic distillation proposed in our earlier publication [Li et al., hid. Eng. Chem. Res., 2013, 52, 3481-3489], in this paper, the vapor-liquid equilibria (VLE) for the FeSO4 + H2O and H2SO4 + FeSO4 + H2O systems were first determined by the quasi-static ebulliometric method. The azeotropic temperatures of the H2SO4 + H2O + entrainer (cyclohexane and octane) systems were also measured. The corresponding electrolyte nonrandom two-liquid interaction parameters were obtained by regressing the experimental data with a maximum average absolute deviation of boiling points of 0.83 K. The model with newly obtained parameters was verified by comparing its prediction with the experimental azeotropic temperature for the H2SO4 + FeSO4 + H2O + C6H12 quaternary system. The temperature and sulfuric acid concentration ranges of the study were 305.9-396.9 K and 0-86.1 wt %, respectively. Following from the experimental results, semicontinuous distillation experiments for the sulfuric acid recovery were performed with cyclohexane as the entrainer. Equipped with the new parameters, Aspen Plus was adopted to carry out the process simulation for the recovery of dilute sulfuric acid by azeotropic distillation. The simulation results show that when cyclohexane was employed as the entrainer, the dilute sulfuric acid can be concentrated to 68% by a packed column containing 4 theoretical stages and with a reboiler temperature of only 361 K.
KeywordSolvent Electrolyte Systems Local Composition Model Excess Gibbs Energy Plus Ethanol Nrtl Model
SubtypeArticle
WOS HeadingsScience & Technology ; Technology
DOI10.1021/ie5013079
URL查看原文
Indexed BySCI
Language英语
WOS KeywordSOLVENT ELECTROLYTE SYSTEMS ; LOCAL COMPOSITION MODEL ; EXCESS GIBBS ENERGY ; PLUS ETHANOL ; NRTL MODEL
WOS Research AreaEngineering
WOS SubjectEngineering, Chemical
WOS IDWOS:000339471500024
Citation statistics
Cited Times:6[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Version出版稿
Identifierhttp://ir.ipe.ac.cn/handle/122111/10922
Collection研究所(批量导入)
Affiliation1.Chinese Acad Sci, Inst Proc Engn, Key Lab Green Proc & Engn, Beijing 100190, Peoples R China
2.Univ British Columbia, Dept Mat Engn, Vancouver, BC V6T 1Z4, Canada
Recommended Citation
GB/T 7714
Li, Geng,Asselin, Edouard,Li, Zhibao. Process Simulation of Sulfuric Acid Recovery by Azeotropic Distillation: Vapor-Liquid Equilibria and Thermodynamic Modeling[J]. INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH,2014,53(29):11794-11804.
APA Li, Geng,Asselin, Edouard,&Li, Zhibao.(2014).Process Simulation of Sulfuric Acid Recovery by Azeotropic Distillation: Vapor-Liquid Equilibria and Thermodynamic Modeling.INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH,53(29),11794-11804.
MLA Li, Geng,et al."Process Simulation of Sulfuric Acid Recovery by Azeotropic Distillation: Vapor-Liquid Equilibria and Thermodynamic Modeling".INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH 53.29(2014):11794-11804.
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