Effect of Ag–Co interactions in the mordenite on the NOx SCR with butane and toluene

SOLEDAD G. ASPROMONTE; EDUARDO E. MIRO; ALICIA V. BOIX

CATALYSIS COMMUNICATIONS

ELSEVIER SCIENCE BV

Lugar: Amsterdam; Año: 2012 vol. 28 p. 105 - 110

1566-7367

A study of the lean NOx reduction activity with butane and toluene in the presence of water over bimetallic and monometallic Ag, Co exchanged on Na-mordenite catalysts was performed. The Ag–Co interactions were analyzed through X-ray photoelectron spectroscopy (XPS) and temperature-programmed reduction (TPR) techniques. It is shown that the metal silver particles formed at low temperature during the TPR experiment improve the dissociation of hydrogen thus facilitating the reduction of Co2+ species. The incorporation of 3.2 wt.% of silver to CoM catalyst, significantly improved the NOx to N2 conversion with butane, which reached 95% under wet conditions (2% H2O). However, this effect was not observed when toluene was the reducing agent.x reduction activity with butane and toluene in the presence of water over bimetallic and monometallic Ag, Co exchanged on Na-mordenite catalysts was performed. The Ag–Co interactions were analyzed through X-ray photoelectron spectroscopy (XPS) and temperature-programmed reduction (TPR) techniques. It is shown that the metal silver particles formed at low temperature during the TPR experiment improve the dissociation of hydrogen thus facilitating the reduction of Co2+ species. The incorporation of 3.2 wt.% of silver to CoM catalyst, significantly improved the NOx to N2 conversion with butane, which reached 95% under wet conditions (2% H2O). However, this effect was not observed when toluene was the reducing agent.–Co interactions were analyzed through X-ray photoelectron spectroscopy (XPS) and temperature-programmed reduction (TPR) techniques. It is shown that the metal silver particles formed at low temperature during the TPR experiment improve the dissociation of hydrogen thus facilitating the reduction of Co2+ species. The incorporation of 3.2 wt.% of silver to CoM catalyst, significantly improved the NOx to N2 conversion with butane, which reached 95% under wet conditions (2% H2O). However, this effect was not observed when toluene was the reducing agent.2+ species. The incorporation of 3.2 wt.% of silver to CoM catalyst, significantly improved the NOx to N2 conversion with butane, which reached 95% under wet conditions (2% H2O). However, this effect was not observed when toluene was the reducing agent.ficantly improved the NOx to N2 conversion with butane, which reached 95% under wet conditions (2% H2O). However, this effect was not observed when toluene was the reducing agent.2O). However, this effect was not observed when toluene was the reducing agent.