Next Article in Journal
Taxi Fleet Renewal in Cities with Improved Hybrid Powertrains: Life Cycle and Sensitivity Analysis in Lisbon Case Study
Previous Article in Journal
Glucose-Treated Manganese Hexacyanoferrate for Sodium-Ion Secondary Battery
Article Menu

Export Article

Open AccessArticle
Energies 2015, 8(9), 9495-9508; doi:10.3390/en8099495

Analysis of a New Liquefaction Combined with Desublimation System for CO2 Separation Based on N2/CO2 Phase Equilibrium

1
School of Energy and Environment, Southeast University, No 2 Si Pai Lou, Nanjing 210096, Jiangsu, China
2
9M Architectural Design Co. Ltd., No 2 Zi Jing Hua Road, Hangzhou 310012, Zhejiang, China
*
Author to whom correspondence should be addressed.
Academic Editor: Paul Stewart
Received: 22 May 2015 / Revised: 30 June 2015 / Accepted: 28 July 2015 / Published: 1 September 2015
View Full-Text   |   Download PDF [357 KB, uploaded 1 September 2015]   |  

Abstract

Cryogenic CO2 capture is considered as a promising CO2 capture method due to its energy saving and environmental friendliness. The phase equilibrium analysis of CO2-mixtures at low temperature is crucial for the design and operation of a cryogenic system because it plays an important role in analysis of recovery and purity of the captured CO2. After removal of water and toxic gas, the main components in typical boiler gases are N2/CO2. Therefore, this paper evaluates the reliabilities of different cubic equations of state (EOS) and mixing rules for N2/CO2. The results show that Peng-Robinson (PR) and Soave-Redlich-Kwong (SRK) fit the experimental data well, PR combined with the van der Waals (vdW) mixing rule is more accurate than the other models. With temperature decrease, the accuracy of the model improves and the deviation of the N2 vapor fraction is 0.43% at 220 K. Based on the selected calculation model, the thermodynamic properties of N2/CO2 at low temperature are analyzed. According to the results, a new liquefaction combined with a desublimation system is proposed. The total recovery and purity of CO2 production of the new system are satisfactory enough for engineering applications. Additionally, the total energy required by the new system to capture the CO2 is about 3.108 MJ·kg−1 CO2, which appears to be at least 9% lower than desublimation separation when the initial concentration of CO2 is 40%. View Full-Text
Keywords: cryogenic CO2 capture; phase equilibrium; equations of state (EOS); mixing rules; energy consumption cryogenic CO2 capture; phase equilibrium; equations of state (EOS); mixing rules; energy consumption
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

Scifeed alert for new publications

Never miss any articles matching your research from any publisher
  • Get alerts for new papers matching your research
  • Find out the new papers from selected authors
  • Updated daily for 49'000+ journals and 6000+ publishers
  • Define your Scifeed now

SciFeed Share & Cite This Article

MDPI and ACS Style

Yang, W.; Li, S.; Li, X.; Liang, Y.; Zhang, X. Analysis of a New Liquefaction Combined with Desublimation System for CO2 Separation Based on N2/CO2 Phase Equilibrium. Energies 2015, 8, 9495-9508.

Show more citation formats Show less citations formats

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Energies EISSN 1996-1073 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top