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Preparation and characteristic of high surface area lignin-based porous carbon by potassium tartrate activation
Microporous and Mesoporous Materials ( IF 5.2 ) Pub Date : 2021-08-04 , DOI: 10.1016/j.micromeso.2021.111340
Daliang Guo 1 , Dinggen Hu 2 , Zhongyu Yan 1 , Kangshuai Yuan 3 , Lizheng Sha 1 , Huifang Zhao 1 , Jianbin Chen 2 , Bei Liu 1
Affiliation  

In order to study the property of lignin-based porous carbon activated by potassium tartrate, the effects of activator types, activator/lignin mass ratio and activation temperature on the surface morphology, specific surface area and pore size distribution of alkali lignin based porous carbon materials were systematically investigated. Meanwhile, the methyl orange adsorption capacity and adsorption kinetics of the lignin-based porous carbon were also evaluated. The N2 adsorption-desorption experiment results showed that the specific surface area value of lignin-based porous carbon materials activated by potassium tartrate (APC-J), KOH (APC-K), and NaOH (APC-Na) are 947, 1113 and 762 m2/g, respectively. Meanwhile, APC-J has a special microporous structure, while the pore structures of APC-K and APC-Na are mainly mesopores. The best specific surface area of lignin-based porous carbon materials was 1911 m2/g obtaining from APC-J-2-8 sample (mass ratio 2:1, activation temperature 800 °C). The adsorption experiment of methyl orange (MO) showed that the adsorption kinetics of APC-J-2-8 conformed to the quasi-second-order kinetic model, mainly chemical adsorption. The isothermal adsorption process conforms to the Langmuir adsorption isothermal adsorption model, which is a single molecular layer adsorption, and the maximum adsorption amounts are 526.31 mg/g.



中文翻译:

酒石酸钾活化制备高表面积木质素基多孔碳及其特性

为研究酒石酸钾活化木质素基多孔碳的性能,研究活化剂种类、活化剂/木质素质量比和活化温度对碱木质素基多孔碳材料表面形貌、比表面积和孔径分布的影响进行了系统的调查。同时,还评估了木质素基多孔碳的甲基橙吸附能力和吸附动力学。N 2吸附-解吸实验结果表明,酒石酸钾(APC-J)、KOH(APC-K)和NaOH(APC-Na)活化的木质素基多孔碳材料的比表面积值为947、1113和 762 m 2/g,分别。同时,APC-J具有特殊的微孔结构,而APC-K和APC-Na的孔结构主要是介孔。APC-J-2-8样品(质量比2:1,活化温度800℃)的木质素基多孔碳材料的最佳比表面积为1911 m 2 /g。甲基橙(MO)的吸附实验表明,APC-J-2-8的吸附动力学符合准二级动力学模型,主要是化学吸附。等温吸附过程符合Langmuir吸附等温吸附模型,为单分子层吸附,最大吸附量为526.31 mg/g。

更新日期:2021-08-20
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