Effect of the oxygen carrier ilmenite on NOX formation in chemical-looping combustion
Artikel i vetenskaplig tidskrift, 2021

The formation of NOx from fuel-bound nitrogen is important for the design of chemical-looping combustion (CLC) power plants. This work studied to what extent NO and NH3 reacts with the perovskite-like oxygen carrier ilmenite under conditions relevant to CLC. Based on mass balance calculations, N2 was the major outlet N-species in all experiments. More NO was measured at lower temperatures and at a higher oxidation level of the oxygen carrier. The presence of syngas hindered the reduction of NO by ilmenite. There were significant differences between the two ilmenites studied with respect to N-species selectivity. Norwegian (rock) ilmenite reduced NO efficiently and showed a stable reaction behavior compared to Australian (sand) ilmenite. This could be attributed to the higher titanium content of Norwegian ilmenite.

Ilmenite

Nitrogen oxides

Perovskite catalyst

Chemical-looping combustion

Oxygen carrier

Ammonia oxidation

Författare

Stefan Mayrhuber

Chalmers, Kemi och kemiteknik

Fredrik Normann

Chalmers, Rymd-, geo- och miljövetenskap, Energiteknik

Duygu Yilmaz

Chalmers, Kemi och kemiteknik, Energi och material, Oorganisk miljökemi 2

Henrik Leion

Chalmers, Kemi och kemiteknik, Energi och material, Oorganisk miljökemi 2

Fuel Processing Technology

0378-3820 (ISSN)

Vol. 222 106962

Ämneskategorier

Kemiska processer

Annan kemiteknik

Annan kemi

DOI

10.1016/j.fuproc.2021.106962

Mer information

Senast uppdaterat

2021-07-29