Structured glass catalytic coating on wire mesh for particulate matter (PM) removal by modified sol-gel processing

摘要

K-containing soot oxidation catalysts are promising to reduce or replace noble metal usage in combustion engine emission abatement systems. In this paper, we introduce a facile approach for applying a K-containing glass catalyst onto structured wire mesh monoliths to achieve low temperature soot removal. A polyvinyl butyral (PVB) modified sol-gel process was developed to yield a crack-free thickness that is 6 times that of the conventional sol-gel process. An intermediate SiO2 barrier layer was found to be effective to insure stability of the glass catalyst over extended cycling periods. The catalytically coated wire mesh can lower the soot ignition temperature ((Tig)) to similar to 370 degrees C with O-2, and offers catalytic stability for long term combustion cycling. (C) 2018 Elsevier B.V. All rights reserved.