Effect of the oxygen carrier ilmenite on NOX formation in chemical-looping combustion
Journal article, 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

Author

Stefan Mayrhuber

Chalmers, Chemistry and Chemical Engineering

Fredrik Normann

Chalmers, Space, Earth and Environment, Energy Technology

Duygu Yilmaz

Chalmers, Chemistry and Chemical Engineering, Energy and Material, Environmental Inorganic Chemistry 2

Henrik Leion

Chalmers, Chemistry and Chemical Engineering, Energy and Material, Environmental Inorganic Chemistry 2

Fuel Processing Technology

0378-3820 (ISSN)

Vol. 222 106962

Subject Categories

Chemical Process Engineering

Other Chemical Engineering

Other Chemistry Topics

DOI

10.1016/j.fuproc.2021.106962

More information

Latest update

7/29/2021