Effect of NiO–Co3O4 loading on catalytic performance of NiO–Co3O4/Nb2O5–TiO2a.
| Loading of NiO and Co3O4/wt% | Loading of NiO/wt% | Loading of Co3O4/wt% | X V/% | S PO/% | S 2-PHEA/% | S 2-PHA/% | S 2-PH/% |
|---|---|---|---|---|---|---|---|
| 10.5 | 7.5 | 3 | 100 | 13.4 | 0 | 73.2 | 12.4 |
| 14 | 10 | 4 | 100 | 18.2 | 0 | 0 | 81.4 |
| 17.5 | 12.5 | 5 | 100 | 23.7 | 0 | 45.5 | 28.9 |
| 21b | 15 | 6 | 88.0 | 5.2 | 75.6 | 18.1 | 0 |
a
Reaction conditions: a weight percentage of catalyst = 15%, T = 200 °C, P = 3 MPa, t = 6 h. X: conversion; S: selectivity. V: n-valeraldehyde; PO: n-pentanol; 2-PHEA: 2-propyl-2-heptenal; 2-PHA: 2-propylheptanal; 2-PH: 2-propylheptanol.
b
The yield of n-pentanol, 2-propyl-2-heptenal, 2-propylheptanal and 2-propylheptanol was respectively 4.6%, 66.5%, 15.9% and 0%.