Composition and method for catalytic reduction of carbon dioxide or carbohydrate
A carbohydrate and carbon dioxide technology, applied in the direction of carbon monoxide, organic compound/hydride/coordination complex catalyst, hydrocarbon production from oxygen-containing organic compounds, etc., can solve the problem of high reaction temperature, slow conversion speed, poor selectivity, etc. problem, to achieve the effect of high conversion efficiency and mild reaction conditions
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Embodiment 1
[0038] Embodiment 1: carbon monoxide is produced by reducing carbon dioxide
[0039] 60 ml of 1-methylimidazole, 2.5 g of zinc powder and 0.5 g of copper powder were added to a one-liter reaction flask. First, vacuumize the reaction bottle to remove the air in the bottle, then pass high-purity carbon dioxide (99.999%) into the bottle, stop the ventilation when the pressure reaches the range of 0.1-0.3 MPa, and seal the reaction bottle. Now analyze the gas composition in the reaction flask with gas chromatography, the result shows that chromatographic peak ( figure 1 b). By comparing with the standard gas ( figure 1 a) Confirm that the gas is carbon dioxide. At this time, the magnetic stirring was turned on, so that the components in the reaction bottle were fully mixed and reacted, and the gas in the bottle was extracted for detection after continuous stirring for 2 hours. The result shows that chromatographic peak appears near t=0.9min ( figure 2 a), and the chromatogra...
Embodiment 2
[0047] Example 2: Reduction of carbon dioxide to methane
[0048] Add 60 ml of ionic liquid (1-ethyl-3-methylimidazolium tetrafluoroborate), 2.5 g of zinc powder and 0.5 g of copper powder into a one-liter reaction flask. After the air in the reaction bottle is removed by vacuum, high-purity carbon dioxide (99.999%) is fed in again, and the ventilation is stopped when the pressure reaches the range of 0.1-0.3 MPa, and the reaction bottle is sealed. After confirming that the gas in the bottle is pure carbon dioxide through gas chromatography detection, turn on the magnetic stirring to make the components mix and react. After stirring and reacting for 3 h, the gas in the bottle was extracted for detection. The result shows that chromatographic peak appears near t=2.2min ( Image 6 a), and the chromatographic peak near t=4.5min disappears completely, indicating that carbon dioxide is completely converted into methane. The methane gas can also burn violently ( Image 6 b), and...
Embodiment 3
[0049] Embodiment 3: carbon monoxide and methane mixed gas are produced by reducing carbon dioxide
[0050] Add 8 grams of imidazole, 60 milliliters of methanol, 2.5 grams of zinc powder and 0.1 gram of silver powder into the above-mentioned one-liter reaction flask. After the air in the reaction bottle is removed by vacuum, high-purity carbon dioxide (99.999%) is fed in again, and the ventilation is stopped when the pressure reaches the range of 0.1-0.3 MPa, and the reaction bottle is sealed. After confirming that the gas in the bottle is pure carbon dioxide through gas chromatography detection, turn on the magnetic stirring to make the components mix and react. After stirring and reacting for 3 h, the gas in the bottle was extracted for detection. The result of gas chromatography shows that all the carbon dioxide in the reaction bottle is converted, and the conversion product is a mixture of carbon monoxide and methane, and carbon monoxide is the main component in the mixed...
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