Page 221 - Advances in bioenergy (2016)

3%Ru/TiO catalyst exhibits better performance but both X EtOH and S are significantly lower
2
H2
than the corresponding values obtained over Ni/(La O /Al O ). The best performing
2 3
2 3
Ni/(La O /Al O ) catalyst exhibits good long-term stability for SR of ethanol to hydrogen
2 3
2 3
production and is a good candidate for ethanol reforming processors for fuel cell
applications. 18

Figure 9.1 (a) Conversions of ethanol and (b) selectivities toward hydrogen obtained as
functions of reaction temperature over 20% Ni/(La O /Al O ), 0.5% Rh/Al O , 3% Ru/TiO ,
2 3
2 3
2
2 3
and 20% Co/Al O catalysts and in the absence of catalyst (homogeneous reactions).
2 3
Experimental conditions: mass of catalyst: 0.1 g; particle diameter, 0.25 < d < 0.50 mm; total
p
3
flow: 350 cm /min; feed composition: 25% EtOH, 75% H O; P = 1 atm. (Reproduced with
2
18
permission from Ref . Copyright 2002, Elsevier.)
Bimetallic or alloy catalysts have also been investigated. 20-22 It has been found that the
presence of Ni improves Rh dispersion on the surface of CeO , leading to higher catalytic
2