Method for preparing biochar through alkali fusion fly ash-straw co-pyrolysis and application of biochar

• Main Authors: MA YUE, HUANG ZHANBIN, SHANG XIUFANG, JIA CHENXIN, MA YAN, YUN XIAOTONG, CUI BIYING, ZHANG YARU, ZHANG FAN, WU SHUMIN
• Format: Patent
• Language: Chinese; English
• Published: 30.09.2022
• Subjects: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; CHEMISTRY; DESTRUCTIVE DISTILLATION OF CARBONAGEOUS MATERIALS FORPRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS; FUELS; LUBRICANTS; METALLURGY; PEAT; PERFORMING OPERATIONS; PETROLEUM, GAS OR COKE INDUSTRIES; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; TECHNICAL GASES CONTAINING CARBON MONOXIDE; THEIR RELEVANT APPARATUS; TRANSPORTING; TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE

The invention provides a method for preparing biochar through alkali fusion fly ash-straw co-pyrolysis and application thereof, and relates to the technical field of agricultural and industrial production waste recycling, the method comprises the following steps: 1) biomass pretreatment: drying, crushing, grinding and sieving corn straw biomass; 2) fly ash alkali modification: mixing fly ash with sodium hydroxide, roasting the mixture in a muffle furnace, and washing and drying the product to obtain alkali-fused fly ash; and 3) co-pyrolysis: fully mixing the corn straw biomass with the alkali-fused fly ash, adding water into the mixture, stirring, drying, grinding, sieving, placing in a nickel boat, then placing in a tubular furnace for pyrolysis, grinding and sieving to obtain the alkali-fused fly ash-straw co-pyrolysis biochar material. The method is low in cost, the adsorption performance of biochar in water and soil on lead is enhanced while coal ash and corn straw biomass are recycled, and the method can