公开(公告)号：US12151228B2

公开(公告)日：2024-11-26

申请号：US17786944

申请日：2020-09-18

Applicant: DALIAN UNIVERSITY OF TECHNOLOGY

Inventor： Yuan Gao ,  Yongfeng Jia ,  Aimin Li ,  Shaofeng Wang ,  Xin Wang

IPC: B01J20/00 ,  B01J20/20 ,  B01J20/30 ,  B09C1/10 ,  C09K17/02

Abstract: A device and method for preparing in-situ molded biochar with high specific surface area. Crushed and mixed biomass and modifier are fed into a hot pressing and pyrolysis device, and hot-pressing molding and pyrolysis carbonization are completed synchronously, which solves the problem of multiple steps and complicated equipment in the existing preparation process for molded biochar material. In-situ bonding molding is realized by adhesion, bridging, cross-linking and mechanical interlocking functions of low-temperature molten & softened lignin and pyrolytic tar. No additional cross-linking agent is needed in this process, so the production cost is low. Covering and suffocating actions of trace flame retardant modifier are utilized to reduce the temperature of biomass pyrolysis carbonization, inhibit excessive ablation and accelerate polycondensation reaction, thus to improve the specific surface area and yield of a product, and improve the cost performance of the product.