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A modified Solvay process with low-temperature calcination of NaHCO3 using monoethanolamine: Solubility determination and thermodynamic modeling
Wang, Qiaoxin1,2; Li, Zhibao1
2019-10-01
Source PublicationAICHE JOURNAL
ISSN0001-1541
Volume65Issue:10Pages:12
Abstract

An energy-saving, modified Solvay process for dense soda ash production was proposed to replace the high-temperature, calcination step of NaHCO3. We found NaHCO3 completely decomposed into anhydrous, Na2CO3 at 353 K in a mixed-solvent containing at least 65 wt% of monoethanolamine (MEA), which is an amine-absorbent prevalently used for CO2 capture. A chemical model was built after the determination of solubilities and through data regression for the solid-liquid system: Na-Cl-NH4-CO3-HCO3-MEA-H2O. Reparameterization for paired-ion interactions were performed via the mixed-solvent electrolyte model. Thermodynamic analysis elucidated the shift in ion dominance from HCO3- to CO32+, thereby providing the phase transition mechanisms. An exploratory, fed-batch experiment was implemented to verify the accuracy of the model, for which the obtained solids were in the form of saleable, dense soda ash products; bulk densities up to 1.01 g/cm(3) were achieved in the laboratory.

KeywordMonoethanolamine Phase Transition Solubility Solvay Process Thermodynamic
DOI10.1002/aic.16701
Language英语
WOS KeywordSodium-carbonate ; Co2 ; Mea ; Electrolytes ; Absorption ; Glycol ; System
WOS Research AreaEngineering
WOS SubjectEngineering, Chemical
WOS IDWOS:000483710300003
PublisherWILEY
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/30733
Collection中国科学院过程工程研究所
Corresponding AuthorLi, Zhibao
Affiliation1.Chinese Acad Sci, Inst Proc Engn, Key Lab Green Proc & Engn, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Dept Chem Engn, Beijing, Peoples R China
Recommended Citation
GB/T 7714
Wang, Qiaoxin,Li, Zhibao. A modified Solvay process with low-temperature calcination of NaHCO3 using monoethanolamine: Solubility determination and thermodynamic modeling[J]. AICHE JOURNAL,2019,65(10):12.
APA Wang, Qiaoxin,&Li, Zhibao.(2019).A modified Solvay process with low-temperature calcination of NaHCO3 using monoethanolamine: Solubility determination and thermodynamic modeling.AICHE JOURNAL,65(10),12.
MLA Wang, Qiaoxin,et al."A modified Solvay process with low-temperature calcination of NaHCO3 using monoethanolamine: Solubility determination and thermodynamic modeling".AICHE JOURNAL 65.10(2019):12.
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