Generation of multi-valence Cu_xO by reduction with activated semi-coke and their collaboration in the selective reduction of NO with NH₃

Abstract

In this work, we systematically analyzed the structure–activity relationship and synergistic mechanism of activated semi-coke (ASC)-loaded multi-valence CuxO for the low-temperature NO-SCR process by NH3.

Reasonably designed CuSbTiOx series catalysts with high NH3-SCR activity and obviously improved SO2 tolerance

“…14 Additionally, Peng et al achieved satisfactory low-temperature SCR activity by loading Cu x O onto activated semicoke (ASC). 15 Bjorkedal et al also synthesized highly dispersed copper catalysts supported on mesoporous ZrO 2 carriers using a sol–gel approach and evaluated their performance in NH 3 -SCR. 16…”

“…14 Additionally, Peng et al achieved satisfactory low-temperature SCR activity by loading Cu x O onto activated semicoke (ASC). 15 Bjorkedal et al also synthesized highly dispersed copper catalysts supported on mesoporous ZrO 2 carriers using a sol-gel approach and evaluated their performance in NH 3 -SCR. 16 To broaden the operational temperature range and enhance the performance of catalysts, the incorporation of a third metallic element has proven to be an effective strategy.…”

Probing the Atomistic Reaction Pathways in CuO/C Catalysts

“…Recently, it was reported that copper oxides demonstrate excellent catalytic activity in LT SCR reactions. − In order to prevent secondary pollution of equipment corrosion caused by NH 3 , C is used as an effective reductant, − which also has excellent adsorption of NO x . Hence, the composites of copper oxides and C have been extensively investigated. − For instance, the CuO-decorated C nanotubes and activated C-supported CuO only show high activity for NO conversion at temperatures ranging from 120 to 250 °C . Nonetheless, the catalytic activity decreases as the temperature exceeds 250 °C, indicating the structural instability of CuO/C composites at higher temperatures, which however remains largely unexplored.…”