Manufacturing of carbon-containing particles
A method for manufacturing a carbon-containing particulate product. A starting material containing a carbonisable precursor material and/or carbon is dispersed in a gas and is conducted through a reaction zone in which at least some of the carbon contained in the product is formed, the gas flowing in a pulsed manner at least in the reaction zone.
1 . A method for manufacturing a carbon-containing particulate product, comprising:
supplying a carrier gas into a mixing chamber via a nozzle;
dispersing a starting material containing a carbonisable precursor material and/or carbon in the carrier gas by spraying the starting material into the mixing chamber;
conducting the gas and the material dispersed therein via a pulsation unit into a reaction zone;
conducting the gas and the material dispersed therein through the reaction zone, in which at least some of the carbon contained in the product is formed;
wherein the pulsation unit provides that the gas flows in a pulsed manner at least in the reaction zone;
wherein the gas pulsates at a frequency between 1 Hz and 50,000 Hz; and
wherein the material dispersed in the gas is heated in the reaction zone at a rate of at least 10 K within 0.1 seconds to a temperature between 800° C. and 1400° C.
2 . The method according to claim 1 , wherein the carbon-containing particulate product has a specific discharge capacity for a charge carrier selected from Li, Na, Al, Mg, Zn, which capacity is at least 100 mAh per gram.
3 . The method according to claim 1 , wherein the gas and the material dispersed therein are conducted in such a way that at least some of the starting material remains continuously dispersed in the gas and is reacted in the gas at least down to the carbon-containing particulate product during passage through the reaction zone.
4 . The method according to claim 1 , wherein in the reaction zone at least some of the carbonisable precursor material is carbonised and at least some of the carbon contained in the product is formed therefrom, and wherein at least some of the carbon arises directly from the carbonisable precursor material without requiring an addition of a further carbon source.
5 . The method according to claim 1 , wherein the starting material contains a submicromaterial precursor and/or a submicromaterial, or a submicromaterial precursor and/or a submicromaterial is/are dispersed in the gas.
6 . The method according to claim 5 , wherein the submicromaterial precursor is reacted to form a submicromaterial.
7 . The method according to claim 5 , wherein the submicromaterial comprises a storage material for a charge carrier selected from Li, Na, Al, Mg, Zn, which capacity is at least 100 mAh per gram.
8 . The method according to claim 1 , wherein the starting material is at least partially liquid.
9 . The method according to claim 1 , wherein the carbonisable precursor material is selected from pitches, bitumen, heavy oils, resins, polyacrylonitriles, polyimides, carbohydrates, lignins, polyethylenes, polystyrenes, polyvinyl chlorides or mixtures thereof and/or the carbon contained in the starting material is selected from among coke particles, carbon black particles, graphite particles, expanded graphite particles, graphenes, ground carbon fibres, carbon nanotubes or vapour-grown carbon fibres or mixtures thereof.
10 . The method according to claim 1 , wherein the gas in which the starting material is dispersed contains an inert gas component.
11 . The method according to claim 1 , wherein the gas and the material dispersed therein are conducted through the reaction zone cocurrently with one another.
12 . The method according to claim 1 , wherein, in the pulsation unit, a pressure gradient is maintained across a passage that opens and closes alternatingly at the frequency of pulsation, so that a pressure pulse maximum occurs immediately behind the passage in a gas flow direction whenever gas flows via the opened passage, and a pressure pulse minimum occurs immediately behind the passage in the gas flow direction whenever the passage is closed.