Table 1.

Catalytic performances of various catalysts in methoxycarbonylation reaction of acetylene ^a.

Entry	Catalyst	Product Rate (gproduct gcat−1 h−1)				Yield %
		MA	MP	DMS	Others
1	a 41.7% Co/SiO2	0	0	0	0	0
2	a 31.6% Co/SiO2	0	0	0	0	0
3	a 25.6% Co/SiO2	0	0	0	0	0
4	b 41.7% Co/SiO2	0	4.42	0.58	0.49	64.1
5	b 31.6% Co/SiO2	0.43	4.0	0.56	0.39	58.6
6	b 25.6% Co/SiO2	0.16	0.23	0	0	≈0
7	b 5% Co/WOx	0	0	0	0	0
8	b 5% Co/HAP	0	0	0	0	0
9	b 5% Co/TiO2	0	0	0	0	0
10	b Co/S-1	0	0	0	0	0
11	b Co powder	0	0	0	0	0

^a Reaction conditions: 10 mg catalyst, 0.05 MPa C₂H₂, 4 MPa CO, 5 mL CH₃OH,160 °C, 1 h. ^b 0.05 MPa C₂H₂, 4 MPa CO, 1 MPa H₂, 5 mL CH₃OH,160 °C, 1 h. Others include 1,1-dimethoxypropane (2,2-DMP) and 3-pentanone. Yield was calculated on the basis of the total amount of MA, MP, and DMS.