Treatment of Flue Gas in a CO 2 Capture Pilot Plant for a Commercial CFB Boiler

Izabela Majchrzak-Kucęba, Dariusz Wawrzyńczak, Janusz Zdeb, Wojciech Smółka and Artur Zajchowski
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Izabela Majchrzak-Kucęba: Department of Advanced Energy Technologies, Faculty of Infrastructure and Environment, Czestochowa University of Technology, Dabrowskiego Street 73, 42-201 Czestochowa, Poland
Dariusz Wawrzyńczak: Department of Advanced Energy Technologies, Faculty of Infrastructure and Environment, Czestochowa University of Technology, Dabrowskiego Street 73, 42-201 Czestochowa, Poland
Janusz Zdeb: TAURON Wytwarzanie S.A., Promienna Street 51, 43-603 Jaworzno, Poland
Wojciech Smółka: TAURON Wytwarzanie S.A., Promienna Street 51, 43-603 Jaworzno, Poland
Artur Zajchowski: TAURON Wytwarzanie S.A., Promienna Street 51, 43-603 Jaworzno, Poland

Energies, 2021, vol. 14, issue 9, 1-15

Abstract: The problem of reducing carbon dioxide emissions from flue gas, particularly from flue gas originating from coal-firing CFB systems, is currently an important challenge. Many centers around the world have tested post-combustion CO 2 capture systems. One of these systems, operated using DR-VPSA adsorption technology (dual-reflux vacuum pressure swing adsorption), was tested under the Strategic Project in Poland. The flue gas in this study originated from a supercritical CFB boiler (460 MWe). An important problem involved in capturing CO 2 from flue gas is the occurrence of SO 2 and NO x . These substances have a negative effect on the CO 2 adsorption process. In this study, commercial impregnated activated carbon was used to remove SO 2 and NOx from CFB flue gas in the pre-treatment section during the tests of a pilot CO 2 capture unit in a large-scale CFB boiler at the Lagisza Power Plant (Poland). The spent activated carbon was analyzed using several different methods (N 2 adsorption–desorption isotherms, SEM-EDX, XRD, FTIR, and TG) to evaluate the efficiency of the operation and life span of the adsorbent used in the SO 2 and NO x removal unit. The results demonstrate that using commercial impregnated activated carbon in the pre-treatment section ensures sufficient flue gas purification and the removal of sulfur oxides but remains insufficient for nitrogen oxides.

Keywords: flue gas; CO 2 capture; DR-VPSA; CFB boiler; SO 2 /NO x removal (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
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