Table 1.

CO₂ hydrogenation using different catalysts

Entry	Catalyst	Solvent	Selectivity (C-mol%)				Activity (mmolCO2·gcat−1·h−1)
			CO	C1–4	C5+	ROH
1*	Co6/MnOx	squalane	0.4	46.4	53.2	0	15.1
2†	Co6/MnOx	squalane	—	—	—	—	0
3	Co0	squalane	0.6	80.7	18.7	0	1.7
4	CoO	squalane	0	0	0	0	0
5	Co3O4	squalane	0	0	0	0	0
6	Mn	squalane	0	0	0	0	0
7	MnO	squalane	0	0	0	0	0
8	MnO2	squalane	0	0	0	0	0
9	Co14/MnOx	squalane	0.5	58.5	41.0	0	6.6
10	Co10/MnOx	squalane	0.5	47.2	52.3	0	11.2
11	Co2/MnOx	squalane	0.4	76.2	23.4	0	13.3
12	Co6/ZnOx	squalane	0.1	80.7	19.2	0	4.8
13	Co6/AlOx	squalane	0.1	94.2	5.7	0	4.1
14	Co6/CeOx	squalane	0.4	89.8	9.8	0	6.3
15	Co6/MnOx	—	0.7	60.9	38.4	0	11.3
16	Co6/MnOx	cyclohexane	0.4	48.3	51.3	0	14.7
17	Co6/MnOx	benzene	0.5	95.3	4.2	0	7.9
18	Co6/MnOx	DMI	0.6	87.6	6.8	5.0	2.6
19	Co6/MnOx	water	0.3	92.9	0	6.8	3.2

Reaction conditions: 20 mg of catalyst, 1.0 mL of solvent (squalane), 200 °C, 15 h, initial pressure 8 MPa (CO₂/H₂ = 1).

^*The conversion of CO₂ was 15.3%, and the selectivity of paraffin in the total hydrocarbons was 78.1 C-mol%; moreover, the selectivity of paraffin in the C₅₊ products was 67.2 C-mol%.

^†No CO₂ was added. The error of activity was ±1.0 mmol_CO2·g_cat⁻¹·h⁻¹ and the error of selectivity was ±1.5 C-mol%, which were obtained by three repeated experiments.