TABLE 4.
Reaction temperatures corresponding to 50% (T50) and 90% (T90) substrate conversion catalyzed by the CeO2X supports and Au/CeO2X catalysts in the oxidation of the propene/toluene/CO gas mixture.
| Samples | T50 (°C) | T90 (°C) | Space Velocity | References | ||||
|---|---|---|---|---|---|---|---|---|
| Propene | Toluene | CO | Propene | Toluene | CO | |||
| CeO2120 | 305 | 205 | 325 | 400 | 325 | 393 | a 50,000 h−1 | This work |
| CeO2140 | 295 | 195 | 320 | 385 | 325 | 387 | a 50,000 h−1 | This work |
| CeO2160 | 305 | 220 | 310 | 400 | 300 | 343 | a 50,000 h−1 | This work |
| CeO2180 | 280 | 170 | 285 | 340 | 280 | 337 | a 50,000 h−1 | This work |
| 3%Au/CeO2120 | 210 | 160 | 119 | 248 | 243 | 188 (38 b ) | a 50,000 h−1 | This work |
| 3%Au/CeO2140 | 215 | 180 | 165 | 274 | 249 | 227 (90 b ) | a 50,000 h−1 | This work |
| 3%Au/CeO2160 | 210 | 170 | 146 | 266 | 250 | 202 (73 b ) | a 50,000 h−1 | This work |
| 3%Au/CeO2180 | 210 | 170 | 146 | 248 | 243 | 198 (70 b ) | a 50,000 h−1 | This work |
| 4%Au/CeO2 | 175 | 240 | < 25 | 210 | 270 | 25 | b 60,000 ml/(g·h) | Aboukaïs et al. (2013) |
| 1.3%Au/CeO2 | 152 | 208 | N/A | 175 | 270 | N/A | c 35,000 h−1 | Ousmane et al. (2011) |
| 4.1%Au/Al2O3 | 375 | N/A | N/A | 410 | N/A | N/A | d 9000 ml/(g·h) | Gluhoi et al. (2005) |
| 1%Au/TiO2 | 332 | 367 | N/A | 340 | >400 | N/A | e 60,000 ml/(g·h) | Hosseini et al. (2007) |
*T90 of the independent CO, oxidation reaction.
a
Reactant composition: 1,000 ppm propene, 100 ppm toluene, 1,000 ppm CO, 6% O2, N2 balance.
b
Reactant composition: 6,000 ppm propene, 2000 ppm toluene, 1,000 ppm CO, air balance.
c
Reactant composition:1,000 ppm propene, 1,000 ppm toluene 9% O2, he balance.
d
Reactant composition: 1,200 ppm propene, 1.08% O2, he balance.
e
Reactant composition:1,000 ppm propene, 1,000 ppm toluene.