US 12,102,977 B2
Biomass-based porous carbon composite materials and preparation thereof and application in CO2 adsorption
Rui Xiao, Nanjing (CN); Chao Liu, Nanjing (CN); Jiahuan Xu, Nanjing (CN); Beichen Xue, Nanjing (CN); Yuyang Fan, Nanjing (CN); Weicong Xu, Nanjing (CN); and Xiangchen Kong, Nanjing (CN)
Assigned to Southeast University, Nanjing (CN)
Filed by Southeast University, Nanjing (CN)
Filed on Jan. 24, 2024, as Appl. No. 18/420,782.
Application 18/420,782 is a continuation of application No. PCT/CN2023/101340, filed on Jun. 20, 2023.
Claims priority of application No. 202210974590.2 (CN), filed on Aug. 15, 2022.
Prior Publication US 2024/0165583 A1, May 23, 2024
Int. Cl. B01J 20/20 (2006.01); B01D 53/04 (2006.01); B01J 20/30 (2006.01)
CPC B01J 20/20 (2013.01) [B01D 53/04 (2013.01); B01J 20/3028 (2013.01); B01J 20/305 (2013.01); B01J 20/3085 (2013.01); B01D 2253/102 (2013.01); B01D 2257/504 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A preparation method of a biomass-based porous carbon composite material, comprising:
drying pulping black liquid into a black liquid solid by stirring the pulping black liquid uniformly, and immersing the pulping black liquid in a liquid nitrogen while stirring to quickly freeze the pulping black liquid and then drying by using a freeze-drying method to obtain the black liquid solid, wherein the black liquid solid comprises lignin as carbon source, and sodium hydroxide, sodium salts, and small-molecular carbohydrate degradation products as a template and an activator;
under the protection of an inert gas, performing arc carbonization treatment on the black liquid solid to obtain a solid product, wherein an arc current in the arc treatment process is 10 to 1000 A and a processing time is 1 s to 10 min;
grinding the solid product to obtain the biomass-based porous carbon composite material, wherein the biomass-based porous carbon composite material comprises porous carbon structures capable of physically adsorbing CO2 and basic substances capable of chemically adsorbing CO2.