Table 3 T₁₀₀ temperature and T₅₀ (the light-off temperature) for Cr₂O₃ at different calcination temperatures (400°–800 °C) and example of previously reported data on different simple, and multi-component oxides. References are indicated for more information about the catalysts composition, surface properties, crystallite phases and experimental/operational conditions.

Cr₂O₃-4

Catalyst dose: 250–300 mg

200

98

Present

Cr₂O₃-6

CO + O₂ with a 1:3 mass ratio

248

115

Present

Cr₂O₃-8

304

132

Present

Cr₂O₃

45–46 g (80 cm³) of catalyst, gas composition, CO~l.2%, O₂~1.2′ %, balance He; gas rate-1400 cm³/min.

340

265

19

CuO/Cr₂O₃ on silica

The feed composition was 2% CO, 2% O₂ in helium. 0.1 g of catalyst at a flow rate of 100 ml min⁻¹

≈500

213

32

CuO/Cr₂O₃ on Alumina

≈320

233

32

Co₃O₄ hexagonal plates

50 mg of catalyst. The feed gas (1.6% CO, 21.0% O₂, and balanced N₂) at a total flow rate of 25 ml min⁻¹

≈117

95

33

Co₃O₄ cubes

≈130

112

33

Co₃O₄ tetrakaidecahedrons

≈120

110

33

CuxCeO₂-X

0.10 g of the catalyst. The reaction gas containing CO (2400ppm) and O₂ (15 vol%) and balance Ar was fed through the catalyst bed at a rate of 100 mL/min.

253

186

34

CoxCeO₂-X

300

216

34

CuMnOx

200 mg of catalyst (40–60 mesh). The standard composition of the feed gas was 1% CO, 20% O₂, and 79% N₂ with a space velocity (SV) of 20000 mL/(h·g_cat).

140

35

35

CuO–CeO₂

50 mg of catalyst. The reaction mixture consisted of 1 vol.% CO, 1.25 vol.% O₂ and 50 vol.% H₂ in He

200

94

36

Co_0.9Fe_2.1O₄

20 mg catalyst were used. The reaction gas mixture consisted of 1% CO and 10% O₂ in argon with a total flow rate of 15 mL/min

235

205

37

α-Fe₂O₃

20 mg of the catalyst. The total flow rate was 15 ml min⁻¹ with 1% of CO and 10% O₂

385

325

38

Co/CeO₂

Catalyst dose: 250–300 mg CO + O₂ with a 1:3 mass ratio

200

150

39