412
B. Bej et al.
Fig. 6 Effect of space velocity on product selectivity. Condition: same as in Fig. 5
3.5 Activity Comparison with Commercial Catalyst
A comparative evaluation of catalyst activity was made from time on stream study
of methanol conversion with commercial Ni-based catalyst, commercial Cu-based
catalyst, and Al 2 O 3 -supported nano-NiO/SiO 2 (prepared) catalyst as shown in Fig. 7.
Experiment was performed under optimum operating condition of 425 °C with steam
to methanol molar ratio 1.8:1 and space velocity of 0.14 kmol of methanol fed per
Fig. 7 Comparison of catalyst activity (TOS study). Condition: temperature, 425 °C; H 2 O: CH 3 OH
(molar), 1.8:1; Space velocity, 0.14 kmol/kg catalyst h
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