Nepheline from K₂CO₃/Nanosized Sodalite as a Prospective Candidate for Diesel Soot Combustion

Abstract

Nepheline group materials obtained by a thermal treatment of K2CO3-supported nanosized sodalite are identified as cost-effective materials which show promising activity and durability toward diesel soot combustion.

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

“…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.…”

“…Catalysts containing potassium (K) have attracted increasing attentions owing to their high activity for soot combustion [12][13][14][15][16][17][18]. Many groups [19][20][21][22][23] have done pioneering and extensive studies for this kind of catalyst system, including evaluation and screening of various catalytic materials, the effects of the soot-catalyst contact and mobility of catalysts, as well as the influence of supports, etc.…”

Oxygen-doped carbon host with enhanced bonding and electron attraction abilities for efficient and stable SnO2/carbon composite battery anode

“…20.45 wt% for OAC, 8.01 wt% for CAC, 4.74 wt% for NAC in Table 1). Oxygen groups play a role of combustion-supporting agent in combustion engineering [31]. Thus, combustion is more sufficient with increasing oxygen content, resulting in exothermic peak shifts to lower temperature.…”

Preparation and catalytic activity of K4Zr5O12 for the oxidation of soot from vehicle engine emissions

“…Recently, in order to get a highly active and stable catalyst, people began to investigate potassium containing compounds [6,25,26]. Okubo et al [26] have reported that potassium-enriched nepheline group materials exhibited excellent soot oxidation activity; and the highly improved oxidation activity was attributed to the major contribution of K species existing on the surface of nepheline group materials.…”

“…Okubo et al [26] have reported that potassium-enriched nepheline group materials exhibited excellent soot oxidation activity; and the highly improved oxidation activity was attributed to the major contribution of K species existing on the surface of nepheline group materials. In this point of view, those potassium containing compounds which are structurally stable in moist air and thermally stable at high temperature should be potential catalysts for soot oxidation.…”