Study on the Reaction Mechanism of the Khco3 Alkali Activation Process in Black Liquor

作     者：Lee, Jeong Han Cha, Young Lok Kang, Yong-Mook Roh, Kwang Chul 

作者机构：Emerging Materials R&D Division Korea Institute of Ceramic Engineering & Technology Jinju-si52851 Korea Republic of Bioenergy Crop Research Institute National Institute of Crop Science Rural Development Administration Muan58545 Korea Republic of Department of Materials Science and Engineering Korea University Seoul02841 Korea Republic of 

出 版 物：《SSRN》 

年 卷 期：2022年

核心收录：

主　　题：Activated carbon 

摘      要：The alkaline hydrothermal separation of cellulose is a crucial step in biofuel generation, wherein black liquor containing lignin and alkali is formed as a by-product. This study explored the reaction mechanism of the residual alkali during the activation process. In this reaction, the impregnated K reagent showed unusual behavior owing to its bonding with the lignin structure, which was confirmed by the K 2P peak shift in X-ray photoelectron spectra. This behavior resulted in the formation of a microporous and mesoporous substance with a high surface area of 2146 m 2 g −1 without the requirement for any additional chemical reagents. Furthermore, the activated carbon derived from black liquor possessed outstanding properties, allowing its use in supercapacitors. This work shows that giant-miscanthus-derived black liquor has potential for use as an activated carbon precursor for application in electric double-layer capacitors owing to its superior electrochemical capabilities. © 2022, The Authors. All rights reserved.