Application of glass soot catalysts on metal supports to achieve low soot oxidation temperature

K-Ca-Si-O glass was applied to metal supports for use as a catalyst for diesel soot combustion. Glasses were processed from the melt and by a sol-gel route. Catalyst activity for the oxidation of diesel exhaust soot and flame soot from an oil lamp was compared by thermogravimetric analysis (TGA). The results show that a K-based catalytic glass coating on metal substrates can reduce the temperature where half of the engine soot is oxidized (T-50) to as low as 360 degrees C under loose contact conditions, and offers catalytic stability for long term combustion cycling. Scanning electron microscopy observations show that sol-gel glass processing is effective for coating complex wire mesh shapes without pore clogging. (C) 2013 Elsevier B.V. All rights reserved.