Yang Zhongzhi, Gleisner Roland, H Mann Doreen, Xu Junming, Jiang Jianchun, Zhu J Y
Institute of Chemical Industry of Forest Products, Chinese Academy of Forestry, National Engineering Lab. for Biomass Chemical Utilization, Key and Open Lab. on Forest Chemical Engineering, SFA, Key Lab. of Biomass Energy and Material, Nanjing 210042, China.
USDA Forest Service, Forest Products Lab., Madison, WI 53726, USA.
Polymers (Basel). 2020 Nov 28;12(12):2829. doi: 10.3390/polym12122829.
Activated carbon (AC) with a very high surface area of over 2000 m/g was produced from low sulfur acid hydrotropic lignin (AHL) from poplar wood using HPO at a moderate temperature of 450 °C (AHL-AC6). ACs with similar surface areas were also obtained under the same activation condition from commercial hardwood alkali lignin and lignosulfonate. Initial evaluation of AC performance was carried out using nitrogen adsorption-desorption and dye adsorption. AHL-AC6 exhibited the best specific surface area and dye adsorption performance. Furthermore, the adsorption results of congo red (CR) and methylene blue (MB) showed AHL-AC6 had greater adsorption capacity than those reported in literature. The dye adsorption data fit to the Langmuir model well. The fitting parameter suggests the adsorption is nearly strong and near irreversible, especially for MB. The present study for the first time provided a procedure for producing AC from lignin with Brunauer-Emmett-Teller (BET) surface area >2000 m/g using low cost and low environmental impact HPO at moderate temperatures.
采用磷酸在450℃的适中温度下，由杨木中的低硫酸性水溶助长木质素（AHL）制备出比表面积超过2000 m²/g的高比表面积活性炭（AHL-AC6）。在相同活化条件下，由商用阔叶材碱木质素和木质素磺酸盐也获得了具有相似比表面积的活性炭。利用氮气吸附-脱附和染料吸附对活性炭性能进行了初步评估。AHL-AC6表现出最佳的比表面积和染料吸附性能。此外，刚果红（CR）和亚甲基蓝（MB）的吸附结果表明，AHL-AC6的吸附容量高于文献报道的值。染料吸附数据与朗缪尔模型拟合良好。拟合参数表明吸附几乎是强吸附且接近不可逆，尤其是对于亚甲基蓝。本研究首次提供了一种在适中温度下使用低成本且对环境影响小的磷酸，由木质素制备比表面积>2000 m²/g的布伦auer-埃米特-特勒（BET）活性炭的方法。
Zotero 插件
