Fig. 4: Mechanistic studies on KES.
From: Direct synthesis of extra-heavy olefins from carbon monoxide and water
a, b FTS Catalytic performances for different ratios. a Yields of hydrocarbons and CO2 on a carbon-atom basis. From left to right: CO/H2 = 9:1 in PEG, CO/H2 = 1:2 in PEG, and CO/H2 = 1:2 in water. b Fractional hydrocarbon selectivity. From left to right: CO/H2 = 9:1 in PEG, CO/H2 = 1:2 in PEG, and CO/H2 = 1:2 in water. All catalytic experiments were conducted in a 50-mL Hastelloy slurry reactor over Ru particles at 200 °C under 2 MPa of syngas for 10 h. Volume of solvent (pure water or PEG) was kept to 15 mL. c, d Impact of water on KES catalytic performances. c Yields of hydrocarbons and CO2 on a carbon-atom basis. From left to right: molar ratios of CO to H2O of 3:1, 3:2, 3:4, and 3:104 (water as the solvent). d Fractional hydrocarbon selectivity. From left to right: molar ratios of CO to H2O of 3:1, 3:2, 3:4 (PEG-400 as the solvent), and 3:104 (water as the solvent). Colors in panels b and d represent the same products as those in Fig. 3b. All catalytic experiments were conducted in a 50-mL Hastelloy slurry reactor over Pt/Mo2N-Ru at 200 °C under 2 MPa of CO for 10 h. Total volume of solvent (pure water for CO:H2O ratio of 3:104 or PEG solvent with 142, 284, and 568 μL of water for CO:H2O ratio of 3:1, 3:2, and 3:4, respectively) were kept to 15 mL.
