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Journal of Membrane Science 421–422 (2012) 299–310
Contents lists available at SciVerse ScienceDirect
Journal of Membrane Science
journal homepage: www.elsevier.com/locate/memsci
Membrane processes for carbon capture from coal-fired power plant flue gas:
A modeling and cost study
Kartik Ramasubramanian a, Hendrik Verweij b, W.S. Winston Ho a,b,n
a
b
The Ohio State University, William G. Lowrie Department of Chemical and Biomolecular Engineering, 2041 College Road, Columbus, OH 43210-1178, United States
Department of Materials Science and Engineering, The Ohio State University, 2041 College Road, Columbus, OH 43210-1178, United States
article info
abstract
Article history:
Received 10 February 2012
Received in revised form
23 July 2012
Accepted 23 July 2012
Available online 1 August 2012
Favorable economics of electricity generation will be crucial to the successful implementation of postcombustion carbon capture. Hence, the US DOE has set a goal of o35% for the increase on the cost of
electricity (COE) due to CO2 capture. For meeting this goal, there is thus a growing need to perform a
cost analysis of emerging separation methods. This paper goes through a detailed modeling and costsensitivity study of a promising membrane-based process for carbon capture: the air-sweep process.
We have studied the impact of membrane performance, selectivity and permeance, on the COE increase
and the capture cost. The effects of operating parameters as well as the membrane price on the overall
cost were determined. Cost calculations show a COE increase of about 33% along with a capture cost of
o$24/t CO2 for the air-sweep process to achieve 90% CO2 recovery and 95% purity of the CO2 product.
This process operates at close to atmospheric feed pressure and requires a low membrane module price
of $27/m2, a CO2/N2 selectivity of about 140 combined with a high CO2 permeance of 3000 GPU.
Although the required membrane properties have not yet been...