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Thermodynamic study on aqueous polyethylene glycol 200 solution and performance assessment for CO2 separation
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Energy Science. Key Laboratory of Material and Chemical Engineering, Nanjing Tech University, Nanjing, China.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Energy Science. Key Laboratory of Material and Chemical Engineering, Nanjing Tech University, Nanjing, China.ORCID iD: 0000-0002-0453-0450
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Energy Science.ORCID iD: 0000-0002-0200-9960
Key Laboratory of Material and Chemical Engineering, Nanjing Tech University, Nanjing, China.
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2020 (English)In: Fluid Phase Equilibria, ISSN 0378-3812, E-ISSN 1879-0224, Vol. 504, article id 112336Article in journal (Refereed) Published
Abstract [en]

To develop polyethylene glycol 200 (PEG200) and aqueous PEG200 solutions (PEG200/H2O) as solvents for CO2 separation, in this study, the available thermo-physical properties of PEG200 and PEG200/H2O measured experimentally were surveyed, evaluated, and correlated with empirical equations. The solubility of CO2 in PEG200 was also surveyed, evaluated and described with the Henry's law with the Poynting correction, while the solubilities of CH4 and N2 in PEG200 were determined experimentally and then described with the Henry's law. The CO2, CH4 and N2 solubilities in PEG200/H2O were measured and described with the Redlich–Kwong Nonrandom-Two-Liquid (RK-NRTL) model. In addition, the performances of PEG200, PEG200/H2O and other commercialized physical solvents for CO2 separation were discussed based on the properties, and the biogas upgrading was chosen as the example to quantitatively evaluate the performances of PEG200 and PEG200/H2O with process simulation and compared with the high pressure water scrubbing (HPWS). It shows that the total energy usage and the amount of recirculated solvent for biogas upgrading can decrease by 9.1% and 26.5%, respectively, when H2O is replaced by PEG200 completely.

Place, publisher, year, edition, pages
Elsevier, 2020. Vol. 504, article id 112336
Keywords [en]
CO2, PEG200, Solubility, Modelling, Process simulation
National Category
Engineering and Technology Energy Engineering
Research subject
Energy Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-76327DOI: 10.1016/j.fluid.2019.112336ISI: 000500036600007Scopus ID: 2-s2.0-85072921202OAI: oai:DiVA.org:ltu-76327DiVA, id: diva2:1359478
Note

Validerad;2019;Nivå 2;2019-10-21 (johcin)

Available from: 2019-10-09 Created: 2019-10-09 Last updated: 2019-12-20Bibliographically approved

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Chen, YifengMa, ChunyanJi, Xiaoyan

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