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Entropy analysis on energy-consumption process and improvement method of temperature/vacuum swing adsorption (TVSA) cycle
Tianjin Univ, Minist Educ China, Key Lab Efficient Utilizat Low & Medium Grade Ene, Tianjin 300350, Peoples R China.;Int Cooperat Res Ctr Carbon Capture Ultra Low Ene, Tianjin, Peoples R China..
Tianjin Univ, Minist Educ China, Key Lab Efficient Utilizat Low & Medium Grade Ene, Tianjin 300350, Peoples R China.;Int Cooperat Res Ctr Carbon Capture Ultra Low Ene, Tianjin, Peoples R China..
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Chemical Engineering.
Tianjin Univ, Minist Educ China, Key Lab Efficient Utilizat Low & Medium Grade Ene, Tianjin 300350, Peoples R China..
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2019 (English)In: Energy, ISSN 0360-5442, E-ISSN 1873-6785, Vol. 179, p. 876-889Article in journal (Refereed) Published
Abstract [en]

CO2 adsorption capture, which could be driven by various forms of energy, has been widely studied in recent years due to the equipment is easy to control with low energy consumption required. However, the existing research on the energy-efficiency aspects of temperature/vacuum swing adsorption (TVSA) for CO2 capture are primarily focus on the quantification of input energy in specific cases. As a classical concept in thermodynamics, entropy has been widely applied in researches on the energy conversion process, which could benefit an in-depth understanding on the mechanism of "heatgeneralized chemical energy" conversion. However, an integrated thermodynamic research framework, which could clarify how to conduct a reasonable energy-consumption analysis of TVSA, has not been established yet. In this paper, a simplified thermodynamic cycle of 4-step TVSA was established, with the assumption of CO2 in adsorbed phase as loop fluid. With the application of the thermodynamic research framework proposed in this paper, the entropy analysis on the thermodynamic cycle was conducted. This study is concerned with application of thermodynamics concept to the CO2 adsorption engineering, which is mainly based on classical thermodynamics but also relying on adsorption physics to supply insight into the energy conversion and energy-efficient mechanism of TVSA technologies.

Place, publisher, year, edition, pages
PERGAMON-ELSEVIER SCIENCE LTD , 2019. Vol. 179, p. 876-889
Keywords [en]
CO2 capture, Adsorption, Carbon pump cycle, Entropy generation, Heat recovery
National Category
Energy Systems
Identifiers
URN: urn:nbn:se:kth:diva-255407DOI: 10.1016/j.energy.2019.05.027ISI: 000472813800075OAI: oai:DiVA.org:kth-255407DiVA, id: diva2:1342852
Note

QC 20190814

Available from: 2019-08-14 Created: 2019-08-14 Last updated: 2019-08-14Bibliographically approved

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Zhao, Ruikai

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