METHOD FOR CONVERTING BIOMASS TO CARBON-LIKE MATERIAL USING THE HYDROTHERMAL CARBONIZATION PROCESS

摘要

1. A method of carrying out the process of hydrothermal carbonization to obtain a coal-like material from biomass, characterized by the presence of at least the following stages:! (i) heating a reaction mixture containing biomass and water to obtain a reaction mixture containing activated biomass, and! (ii) adding a polymerization initiator to the reaction mixture obtained in step (i) to polymerize the activated biomass and obtain a reaction mixture containing a carbon-like material. ! 2. A method according to claim 1, characterized in that the polymerization initiator is selected from oxygen, hydrogen peroxide, azo compounds and initiators of redox reactions. ! 3. A method according to claim 1 or 2, characterized in that the amount of the polymerization initiator is from 0.01 to 2 wt%, preferably from 0.05 to 0.2 wt%, based on the weight of the reaction mixture. ! 4. The method according to claim 1 or 2, characterized in that in step (i) the reaction mixture is heated to 210-250 ° C. !five. The method according to claim 1 or 2, characterized in that in step (i) the reaction mixture has a pH of 3 to 7, preferably 5 to 7.! 6. The method according to claim 1 or 2, characterized in that acid is added to the reaction mixture before or during step (i). ! 7. A method according to claim 1 or 2, characterized in that step (ii) is carried out at a temperature in the range 140-220 ° C, preferably in the range 170-210 ° C. ! 8. A method according to claim 1 or 2, characterized in that the temperature of step (i) is higher than that of step (ii). ! 9. A method according to claim 1 or 2, characterized in that the carbon-like material is the product of the polymerization step (ii). ! 10. The method according to claim 1 or 2, characterized in that the carbon-like material in terms of dry weight has at least one �