Technical and economic aspects of oxygen separation for oxy-fuel purposes

Open access


Oxy combustion is the most promising technology for carbon dioxide, originated from thermal power plants, capture and storage. The oxygen in sufficient quantities can be separated from air in cryogenic installations. Even the state-of-art air separation units are characterized by high energy demands decreasing net efficiency of thermal power plant by at least 7%. This efficiency decrease can be mitigated by the use of waste nitrogen, e.g., as the medium for lignite drying. It is also possible to store energy in liquefied gases and recover it by liquid pressurization, warm-up to ambient temperature and expansion. Exergetic efficiency of the proposed energy accumulator may reach 85%.

[1] Chorowski M.: Cryogenics – basics and applications. IPPU MASTA, Gdańsk 2007 (in Polish).

[2] Chorowski M., Gizicki W.: Oxygen production for oxy-combustion applications. In: Proc. of ICEC 24-ICMC 2012, May 14–18, 2012, Fukuoka, Japan, Cryogenics and Superconductivity Society of Japan, 2013.

[3] Wilkinson M.B., Boden J.C., Panesar R.S., Babcock M., Allam R.J.: CO2 capture via oxyfuel firing: Optimisation of a retrofit design concept for a refinery power station boiler. 1st Nat. Conf. on Carbon Sequestration. Washington DC, USA, May 15-17, 2001.

[4] Fu C., Gundersen T.: Optimized air separation units for oxy-combustion processes. In: Proc. of the 23rd IIR Int. Congress of Refrigeration, Prague, Aug. 21–26, 2011.

[5] Li H., Hu Y., Ditaranto M., Willson D., Yan J.: Optimization of cryogenic CO2 purification for oxy-coal combustion. Energy Procedia 37(2013), 1341–1347.

[6] Prosser N., Shah M.: Air separation for oxy-coal power plants. In: Proc. of the 2nd Oxyfuel Combustion Conference, Queensland, Australia, Sept. 12–16, 2011.

[7] Belaissaoui B., Le Moullec Y., Hagi H., Favre E.: Energy efficiency of oxygen enriched air production technologies: Cryogeny vs membranes. Sep. Purif. Technol. 125(2014), 142–150.

[8] Lichota J., Plutecki Z., Pawlak-Kruczek H., Anweiler S., Nowosielski G.: Mathematical modeling of fluidized bed lignite dryers. In: Proc. of the 38th Int. Tech. Conf. on Clean Coal and Fuel Systems, June 2–6, 2013, Clearwater, Florida, Coal Technologies Associates, 2013.

[9] Wróblewski M.: Cryogenic installations coupled with energy recovery systems. MSc thesis, Wroclaw University of Technology, Wroclaw 2014 (in Polish).

Archives of Thermodynamics

The Journal of Committee on Thermodynamics and Combustion of Polish Academy of Sciences

Journal Information

CiteScore 2016: 0.54

SCImago Journal Rank (SJR) 2016: 0.319
Source Normalized Impact per Paper (SNIP) 2016: 0.598


All Time Past Year Past 30 Days
Abstract Views 0 0 0
Full Text Views 106 106 20
PDF Downloads 34 34 9