Examples of 'washcoat' in a sentence
Meaning of "washcoat"
Washcoat is a thin layer of material applied to a surface, commonly used in automotive catalysts
How to use "washcoat" in a sentence
Basic
Advanced
washcoat
A washcoat is a thin oxidic layer on a solid surface.
A preferred oxidation catalyst is platinum on an alumina washcoat.
The dried washcoat is then cured and calcined.
This oxidizing step enhances adhesion of the washcoat.
The same type of washcoat applied by the same process.
This technique may be used when a zeolite washcoat is used.
The washcoat is a coating consisting of an active compound filler and of a binder.
This catalyst may simply comprise a conventional alumina washcoat.
Washcoat or washcoat slurry can exist in two fundamentally different embodiments.
Both substances act to block the absorption of sulfur by the washcoat.
A washcoat may be prepared.
Further embodiments may have baria in the first washcoat layer.
Washcoat catalysts generally yielded lower degree of decomposition than packed bed catalysts.
Outlet layer washcoat.
The washcoat layer has adjustable thickness between about five to sixty microns.
See also
The catalyst carriers of the present invention do not require a washcoat.
The combination of the anodized and washcoat layers offers many advantages.
This process may have to be repeated to achieve the desired washcoat loading.
A top washcoat is prepared by making a slurry comprising a platinum group metal impregnated alumina.
Inlet layer washcoat.
These bricks have the form of a ceramic honeycomb which is coated with a washcoat.
The catalytic materials are suspended in the washcoat prior to applying to the core.
The catalyst structure is a ceramic structure coated with a cerium and alumninum oxide washcoat.
These harsh conditions can cause the washcoat layer to flake off.
The Examples use ceramic honeycomb catalysts none of which use a zirconia washcoat.
The catalytic species may be applied to the washcoat using techniques known in the art.
The washcoat layers were prepared as follows,.
The core is dipped in the slurry and the resulting washcoat is dried.
Consequently, the washcoat layer is free from flaking.
A person skilled in the art knows how such a washcoat can be produced.
Several washcoats may be performed to control uniformity of the washcoat layer 26.
Formation of each can be limited by modifications to the washcoat and precious metals used.
The washcoat may be applied to a substrate, for example, in multiple passes or coats.
The active metals are added and subsequently fixed to the washcoat support to form a catalyst.
The second washcoat layer is substantially free of platinum, cerium and barium.
Other additives such as binders and stabilizers can also be included in the washcoat composition.
Gamma-alumina is often used as the washcoat in such exhaust gas catalysts.
Most desirably, however is the use of a zirconia sol or suspension as the washcoat.
The washcoat can be made from any suitable material, such as aluminum oxide.
For example, it is difficult to control the uniformity of washcoat layer thickness.
This cross-linking results in a washcoat layer having significant mechanical and thermal strength.
A representative process for preparing a bi-layer washcoat set forth below.
The washcoat composition includes a thermosetting acrylic polymer, an epoxy resin and an acid catalyst.
Subsequently, the process is repeated by dipping further into the washcoat sol.
Another potential problem with water-based washcoat layers is its limited mechanical durability.
Typically, the SCR component is part of a composition that includes other components in a washcoat.
First, the catalyst washcoat had a slightly different composition and structure than the catalyst powders.
The method for coating is not particularly limited, but a washcoat method is preferable.
The washcoat layer 26 has a large surface área.
Drying and calcinating the coated substrate to fix the undercoat washcoat layer onto the substrate ;.
