Characterization of zeolites as environmental washcoat materials on cordierite ceramics
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Date
2016
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Abstract
Small engines, such as conventional two-stroke engines used in marine
outboards and personal watercraft (PWC), are high polluters relative to
their engine size and usage. Porous structures based on zeolites show
promising characteristics as wash coat materials on cordierite ceramics
for tailpipe exhaust emission control. This study reports the
characterization of commercial grades of zeolites (Ammonium form of
ZSM-5, Zeolite Y, and Mordenite) and several transition phases of these
zeolites aiming at their use as environmental washcoat materials.
Thermogravimetry, X-ray diffraction, specific surface area, and electron
microscopy were used to characterize the zeolites. ZSM-5 shows high
thermal and structural stability compared to the other zeolites
investigated. As porogenic and increased active site agents, the
transition phases showed a large quantity of meso-macro pores and a
variation in the specific surface areas of the zeolites still large enough,
which highlights their potential to be used in environmental catalysis.
Description
Research Article
Keywords
Zeolite, transition phases, specific surface area, functional coating, porogenic