Reducing the cost of CO{sub 2} capture from flue gases using pressure swing adsorption

Journal Article · Tue Jul 15 04:00:00 EDT 2008 · Industrial and Engineering Chemistry Research

DOI:https://doi.org/10.1021/ie070831e· OSTI ID:21073799

Ho, M T; Allinson, G W; Wiley, D E ^[1]

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1. University of New South Wales, Sydney, NSW (Australia)

Pressure swing adsorption (PSA) processes have been used extensively for gas separation, especially in the separation of hydrogen from CO{sub 2}, and in air purification. The objective of this paper is to examine the economic feasibility of pressure swing adsorption (PSA) for recovering CO{sub 2} from postcombustion power plant flue gas. The analysis considers both high-pressure feed and vacuum desorption using commercial adsorbent 13X, which has a working capacity of 2.2 mol/kg and CO{sub 2}/N{sub 2} selectivity of 54. The results show that using vacuum desorption reduces the capture cost from US$57 to US$$51 per ton of CO{sub 2} avoided and is comparable in cost to CO{sub 2} capture using conventional MEA absorption of US$$49 per ton of CO{sub 2} avoided. In this paper, a sensitivity analysis is also presented showing the effect on the capture cost with changes in process cycle; feed pressure and evacuation pressure; improvements the adsorbent characteristics; and selectivity and working capacity. The results show that a hypothetical adsorbent with a working capacity of 4.3 mol/kg and a CO{sub 2}/N{sub 2} selectivity of 150 can reduce the capture cost to US$30 per ton of CO{sub 2} avoided.

• OSTI ID: 21073799
• Journal Information: Industrial and Engineering Chemistry Research, Journal Name: Industrial and Engineering Chemistry Research Journal Issue: 14 Vol. 47; ISSN IECRED; ISSN 0888-5885
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
ADSORBENTS
ADSORPTION
CAPTURE
CARBON DIOXIDE
DESORPTION
ECONOMIC ANALYSIS
FLUE GAS
FOSSIL-FUEL POWER PLANTS
PRESSURE DEPENDENCE
SENSITIVITY ANALYSIS
SEPARATION PROCESSES