Method for preparing nitrogen-doped porous carbon from heavy organic component in coal liquefaction residue
A technology of coal liquefaction residue and nitrogen doping, applied in chemical instruments and methods, inorganic chemistry, carbon compounds, etc., to achieve the effect of easy large-scale production, low equipment requirements, and simple preparation process
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Embodiment 1
[0028] Mix the coal liquefaction residue with THF, extract and evaporate the solvent to obtain carbon-rich heavy organic components; mix the heavy organic components with dicyandiamide at a mass ratio of 1:0.5, and pre-oxidize in air at 300 °C for 1 h , to obtain a nitrogen-rich carbon source; the resulting nitrogen-rich carbon source is placed in a tube furnace, and the nitrogen-rich carbon source is 2 Under the atmosphere, the temperature was raised to 1000 °C at a rate of 10 °C / min, and the CO flow rate was switched to 50 mL / min. 2 , activated for 1 h, after completion, switch to 50mL / min N 2 , and cooled to room temperature to obtain nitrogen-doped porous carbon. The main properties of the porous carbon are shown in Table 1.
Embodiment 2
[0030] The coal liquefaction residue was mixed with tetrahydrofuran, and after extraction, the solvent was evaporated to obtain carbon-rich heavy organic components; the heavy organic components were mixed with ammonium chloride at a mass ratio of 1:5, and pre-oxidized in air at 150 °C for 10 h. The nitrogen-rich carbon source was obtained; the obtained nitrogen-rich carbon source was placed in a tube furnace, under an Ar atmosphere of 300 mL / min, the temperature was raised to 800 °C at a rate of 5 °C / min, and the flow rate was switched to 50 mL / min of H 2 O, activated for 10 h, after completion, switch to Ar at 300 mL / min, and cool to room temperature to obtain nitrogen-doped porous carbon. The main properties of the porous carbon are shown in Table 1.
Embodiment 3
[0032] Mix coal liquefaction residue with tetrahydrofuran, extract and evaporate the solvent to obtain carbon-rich heavy organic components; mix heavy organic components with urea at a mass ratio of 1:2, pre-oxidize in air at 200 °C for 3 h, and obtain rich Nitrogen-carbon source; the obtained nitrogen-rich carbon source was placed in a tube furnace, and in a He atmosphere of 250 mL / min, the temperature was raised to 500 °C at a rate of 1 °C / min, and the flow rate was switched to O at 100 mL / min. 2 , activated for 2 h, after the completion, switch to 250 mL / min helium, and cool to room temperature to obtain nitrogen-doped porous carbon. The main properties of the porous carbon are shown in Table 1.
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