The promotion of cobalt mordenite by palladium for the lean CH4-SCR of NOx in moist streams

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.…”

Promotional effects and mechanism of second cations on activity and stability of Co-MOR for nitrous oxide decomposition: UV–Vis spectroscopy and EXAFS analysis

“…6 and [39]. Moreover, it is found that the distribution of Co ions in the zeolite is not only affected by the preparation process and cobalt loading but also on the co-cation presence [5][6][7][8][9][11][12]14]. As shown in Fig.…”

“…It has been shown that addition of a second metal, such as rare earth metal La or noble metal Pd or Pt, to Co-zeolites could improve their stability in the presence of water vapor [10][11][12][13][14]. For example, La ions were found to retard dealumination from the zeolite and thus stabilize Co-mordenite catalysts for NO reduction [10].…”

Enhanced Low-Temperature Activity of Ag-Promoted Co-ZSM-5 for the CH4-SCR of NO

“…Co 0? ) [21,22] and the one at 580°C is indicative of CoO x species in the channels or surface of zeolites (profile (b)) [22,23].…”