SCR of NO with methane over Co-HBEA and PdCo-HBEA catalysts

Improved stability of Co-Ferrierite catalyst by Mn in dry–wet cycles of lean CH4-SCR of NOx

“…Therefore, the introduction of a small amount of Mn in Co-FER makes reversible the catalyst deactivation in wet test and causes a slight improvement of the catalytic activity at low temperature in the successive dry test. A similar effect was reported for PdCo-HBEA [14] and AgCo-FER, although with a lower NO x conversion in wet conditions [17].…”

“…In contrast, the addition of Pd to Co-HMOR [14], or In to Co-FER [15] results in enhanced activity. Finally, in order to improve the water tolerance of SCR zeolite catalysts the stabilising effect of a co-cation having lower affinity for water adsorption has been reported [16].…”

Effect of the Mesostructuration of the Beta Zeolite Support on the Properties of Cobalt Catalysts for Fischer–Tropsch Synthesis

“…In addition, the value of Si/Al ratio increased in both supports for the impregnated samples. This can be due to either a decrease of aluminum on the surface or to cobalt incorporation on aluminum; this effect is even clearer for [48]. The transmission electron micrograph of 5-B sample is displayed in Fig.…”

On the enhancing effect of Ce in Pd-MOR catalysts for NOx CH4-SCR: A structure-reactivity study

“…Cobalt-containing zeolites, introduced by Li and Armor as active catalysts for CH 4 -SCR [6], have been widely studied by the scientific community [7][8][9][10][11]. This research has significantly contributed to the understanding of the nature of active species involved in this reaction, as well as the important parameters [12][13][14][15][16][17][18], Pt/Co [19,20], In/Co [21][22][23], La/Co [24], Zn/Co [25], Ag/Co [26] and Mn/Co [27]. However, the use of Co in final products such as catalytic converters may be restricted for legal reasons.…”