Selective catalytic reduction of NO with NH3 over CuOX-carbonaceous materials

CuOX-carbon nanotubes (CNTs), CuOX-activated carbon (AC) and CuOX-graphite catalysts were prepared by wet impregnation method and their De-NOX property were studied. SEM, EDX, TPD, TPR, AAS and XPS were employed to probe the effect of carbonaceous material supports and the nature of CuOX species appeared on catalyst surface. The existence of Cu+, good dispersion and strong acid sites were found to contribute to the low temperature catalytic activity of CuOX-CNTs with a NO removal efficiency of 67% at 250 °C. Moreover, the regeneration of deactivated CuOX-CNTs catalyst caused by SO2 could be achieved by 300 °C heating the catalyst in N2.

Graphical abstractThe deactivation of catalyst Cu–CNTs could be eliminated completely by heating catalyst in N2 at 300 °C.Figure optionsDownload full-size imageDownload as PowerPoint slideHighlights►Cu-CNTs, Cu-ACs and Cu-Gs were prepared by wet impregnation method. ► The De-NOX property of this series of catalysts was studied. ► Existence of Cu+ is found to contribute to catalytic activity of Cu-CNTs. ► Deactivated Cu-CNTs caused by SO2 was regenerated by 300C heating in N2.