The effect of Ca2+ and Al3+ additions on the stability of potassium disilicate glass as a soot oxidation catalyst

K-supported catalysts for diesel soot combustion: Making a balance between activity and stability

“…In order to balance them, one strategy is to develop a kind of K-containing catalyst in which the highly active free K + ions can continuously be supplied by the K + ions in the lattice [50,51]. Su et al has proposed a silicate glass catalyst for soot combustion [51].…”

“…Generally, either using water washing [18,49,50] or exposure to water vapor [13,51] is considered to be evaluation methods of catalyst stability in diesel exhaust containing water. Comparatively, water washing is thought as a simple, but drastic mean [26] and thus was chosen in this work.…”

Catalytic diesel soot oxidation by hydrothermally stable glass catalysts

“…By optimizing the glass composition, soot combustion temperatures in the 375-400°C range have been achieved [5].…”

Strong Enhancement of deSoot Activity of Transition Metal Oxides by Alkali Doping: Additive Effects of Potassium and Nitric Oxide

“…Examples of the use of mixed oxides (potassium bulk promotion) as catalysts include K 6 [17] or KVO 3 and K 4 V 2 O 7 [18]. Potassium containing glasses [19,20] have also been found recently as a component of the most active soot combustion catalysts [21].…”