Physicochemical properties and reaction rates of various Cu@ZnO/Al2O3 catalysts.
| Catalyst | BET surface area (m2 g−1) | Cu species contenta (wt%) | Cu crystallite sizeb (nm) | Mean Cu particle sizec (nm) | Reaction rated (μmolCO gcat−1 s−1) | E a (kJ mol−1) |
|---|---|---|---|---|---|---|
| Cu@ZnO/Al2O3-300R | 61.8 | 27.5 | 7.6 | 5.4 | 19.47 | 56.5 |
| Cu@ZnO/Al2O3-350R | 51.8 | 28.4 | 7.5 | 5.5 | 12.83 | 58.7 |
| Cu@ZnO/Al2O3-400R | 54.2 | 27.8 | 7.9 | 5.3 | 10.31 | 62.4 |
a
Cu species content was determined by using the inductively coupled plasma–atomic emission spectroscopy (ICP–AES).
b
Crystallite size of Cu was determined by XRD using Scherrer equation.
c
Mean particle size of Cu was determined by TEM.
d
Reaction rates were obtained at 175 °C, with a CO conversion below 15%.