D.J. Segobia et al. / Applied Catalysis A: General 445–446 (2012) 69–75
75
Table 3
Catalytic results for butyronitrile hydrogenation on Ni/SiO2 and Co/SiO2 at 343 K.
Catalyst
PH2 (bar)
Initial activity r0 (mmol/h g)
Reaction length (min)
Conversion (XBN) and selectivities (Sj,
) at the end of reaction
BN
%
XBN
SBA
SDBA
Ni/SiO2
Ni/SiO2
Co/SiO2
Co/SiO2
13
25
13
25
15.2
26.4
10.8
19.5
450
400
520
500
100
100
100
100
78
76
93
97
22
24
7
3
Solvent: ethanol (150 mL), Wcat = 1 g, VBN = 3 mL.
1
0
0
0
0
0
.0
.8
.6
.4
.2
.0
1.0
0.8
0.6
0.4
0.2
0.0
1.0
1.0
0.8
0.6
0.4
0.2
0.0
A
B
0.8
0.6
0.4
0.2
0.0
0
100 200 300 400 500
0
100
200
300
400
500
Time (min)
Time (min)
Fig. 7. Butyronitrile hydrogenation on Co/SiO2 (A) and Ni/SiO2 (B) at 343 K and 25 bar. ꢀ BN, ᭹ BA, ꢂ DBA, ꢀ BBA. [Solvent: ethanol (150 mL), Wcat: 1 g, VBN = 3 mL.].
yield) to BA on Co/SiO2 at the end of reaction increased with PH2 ,
from 93% at 13 bar to 97% at 25 bar, suggesting a positive effect of
the H2 pressure on BA selectivity.
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. Conclusions
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2
tially dibuytilamine but are rapidly deactivated during the reaction
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2
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8
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The n-butylamine selectivity on Co/SiO2 was greatly improved
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4
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Authors thank the Universidad Nacional del Litoral (UNL),
Consejo Nacional de Investigaciones Científicas y Técnicas (CON-
ICET), and Agencia Nacional de Promoción Científica y Tecnológica
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(
ANPCyT), Argentina, for the financial support of this work.
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