On 2011-05-06 23:55, Axil Axil wrote:
[...] This is standard powder coating technology. The SSS will be very soft
and the NiO powder will sink into the SSS. The NiO powder will remain
strong and intact on the hot surface and will not melt until the
temperature of 2000C is reached
Do you think that standard automotive catalytic converter manufacturing
processes could apply in the case of the E-Cat? Somehow, I think the
reactor part could be very similar to one of them, with a stainless
steel foil honeycomb coated with the catalyst, to maximize surface area.
I'm not sure where the internal heater could be in this case, though.
By the way, have a read at the description in the Wikipedia page, they
really share many similarities:
http://en.wikipedia.org/wiki/Catalytic_converter
* * *
The catalytic converter consists of several components:
The core, or substrate. The core is often a ceramic honeycomb in
modern catalytic converters, but stainless steel foil honeycombs are
also used. The honeycomb surface increases the amount of surface area
available to support the catalyst, and therefore is often called a
"catalyst support". The ceramic substrate was invented by Rodney Bagley,
Irwin Lachman and Ronald Lewis at Corning Glass, for which they were
inducted into the National Inventors Hall of Fame in 2002.
The washcoat. A washcoat is used to make converters more efficient,
often as a mixture of silica and alumina. The washcoat, when added to
the core, forms a rough, irregular surface, which has a far-greater
surface area than the flat-core surfaces do, which then gives the
converter core a larger surface area, and therefore more places for
active precious-metal sites. The catalyst is added to the washcoat (in
suspension) before being applied to the core.
The catalyst itself is most often a precious metal. Platinum is the
most-active catalyst and is widely used. It is not suitable for all
applications, however, because of unwanted additional reactions and/or
cost. Palladium and rhodium are two other precious metals used. Platinum
and rhodium are used as a reduction catalyst, while platinum and
palladium are used as an oxidation catalyst. Cerium, iron, manganese and
nickel are also used, although each has its own limitations. Nickel is
not legal for use in the European Union (because of its reaction with
carbon monoxide). Copper can be used everywhere except North America,
where its use is illegal because of the formation of dioxin.
* * *
Cheers,
S.A.
