Chemical Engineeringに記事が掲載されました
原文はこちら http://www.che.com/news/4518.html
...and a Ni-based syngas catalyst promises
to slash reformer size and costs
Keiichi Tomishige, an associate professor
at University of Tsukuba
(www.ims.tsukuha.ac.jp), has developed a
new high-performance catalyst for the highly
efficient production of syngas,
with support from the New Energy and Industrial
Technology Development Organization (Kawasaki,
both Japan).
The nickel-based catalyst is selectively
impregnated with small amounts of precious
metals (Pt, Pd and Rh) on the surface.
By performing the impregnation sequentially,
rather than by conventional co-impregnation,
Tomishige is able to control the
structure of bi-metallic (Ni and precious
metal) particles on the surface. This leads
to active sites that accelerate both
exotherrnlc and endothermic reactions, resulting
in the suppression of hot spots and carbon
formation. The catalyst is also
less prone to deactivation by oxidation of
Ni, he says.
Because of the enhanced reactivity, Tomishige
estimates that reformers operating with the
new catalyst can be one-fourth
the size of a conventional reformer with
the same production capacity. And the cost
of the catalyst is expected to be
significantly lower due to the use of predominantly
nickel with reduced amounts of precious metals.
The researchers are planning to scale up
their work and apply the catalyst technology
to the oxidative-reforming of other
hydrocarbon feeds, such as city gas, gasoline,
methanol and kerosene, with the aim to produce
H2 for fuel cells.