Method for increasing micro-mesopores of wood carbon based on solvent permeation and application of prepared wood carbon

• Main Authors: ZHOU LIANGLIANG, LUO PEIYUAN, OUYANG JIE, LUO YONGFENG
• Format: Patent
• Language: Chinese; English
• Published: 03.05.2024
• Subjects: APPARATUS THEREFOR; CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; CHEMISTRY; COMPOUNDS THEREOF; ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTIONOF COMPOUNDS OR NON-METALS; INORGANIC CHEMISTRY; METALLURGY; NON-METALLIC ELEMENTS; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; THEIR RELEVANT APPARATUS; TRANSPORTING; TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE

The invention relates to a method for increasing wood carbon micro-mesopores based on solvent permeation. The wood is cut into sheets with the preset size, and thermal modification is carried out; the wood sheets pre-carbonized in the step 1) are soaked in a polar solvent for 6-10 hours, and ultrasonic oscillation is carried out; the polar solvent comprises acetone, ethanol, petroleum ether, ethyl acetate, methanol and water; soaking the slices treated in the step 2) in a polar solvent for 8-20 hours; performing drying; and calcining the dried wood sheets in a protective atmosphere to form wood carbon. According to the method, cellulose/hemicellulose in the cell wall is preliminarily pyrolyzed through thermal modification to form a cuticle, then the porosity of the cell wall of the wood subjected to thermal modification is improved through the similar intermiscibility effect and the permeation effect of the polar small molecule solvent, and finally the micropore/mesopore volume of the cell wall of the wood de