Synthesis of CrO _x /C catalysts for low temperature NH₃-SCR with enhanced regeneration ability in the presence of SO₂.

ABSTRACT: Chromium oxide nano-particles with an average diameter of 3 nm covered by amorphous carbon (CrO _x /C) were successfully synthesized. The synthesized CrO _x /C materials were used for the selective catalytic reduction of NO _x by NH₃ (NH₃-SCR), which shows superb NH₃-SCR activity and in particular, satisfactory regeneration ability in the presence of SO₂ compared with Mn-based catalysts. The as-prepared catalysts were characterized by XRD, HRTEM, Raman, FTIR, BET, TPD, TPR, XPS and in situ FTIR techniques. The results indicated presence of certain amounts of unstable lattice oxygen exposed on the surface of CrO _x nano-particles with an average size of 3 nm in the CrO

SUBMITTER: Yu S 

PROVIDER: S-EPMC9077754 | biostudies-literature | 2018 Jan

REPOSITORIES: biostudies-literature