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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 Publication | AICHE JOURNAL
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ISSN | 0001-1541 |
Volume | 65Issue: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. |
Keyword | Monoethanolamine Phase Transition Solubility Solvay Process Thermodynamic |
DOI | 10.1002/aic.16701 |
Language | 英语 |
WOS Keyword | Sodium-carbonate ; Co2 ; Mea ; Electrolytes ; Absorption ; Glycol ; System |
WOS Research Area | Engineering |
WOS Subject | Engineering, Chemical |
WOS ID | WOS:000483710300003 |
Publisher | WILEY |
Citation statistics | |
Document Type | 期刊论文 |
Identifier | http://ir.ipe.ac.cn/handle/122111/30733 |
Collection | 中国科学院过程工程研究所 |
Corresponding Author | Li, Zhibao |
Affiliation | 1.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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A modified Solvay pr(4131KB) | 期刊论文 | 出版稿 | 限制开放 | CC BY-NC-SA | Application Full Text |
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