煤-生物质基活性炭成孔机制及其吸附乙酸乙酯的性能

doi:10.16085/j.issn.1000-6613.2021-0557

化工进展 ›› 2021, Vol. 40 ›› Issue (S2): 162-175.DOI: 10.16085/j.issn.1000-6613.2021-0557

煤-生物质基活性炭成孔机制及其吸附乙酸乙酯的性能

金春江¹^,²^,³(), 王鲁元¹^,²(), 陈惠敏³, 程星星⁴, 张兴宇², 孙荣峰¹^,², 耿文广¹^,², 仇洪波⁵

^1.山东省科学院能源研究所，山东济南 250014
^2.齐鲁工业大学能源与动力工程学院，山东济南 250014
^3.昌吉学院，新疆昌吉 831100
^4.山东大学能源与动力工程学院，山东济南 250061
^5.山东国舜建设集团有限公司，山东济南 250300

收稿日期:2021-03-19 修回日期:2021-04-24 出版日期:2021-11-12 发布日期:2021-11-12
通讯作者: 王鲁元
作者简介:金春江（1994—），男，硕士研究生，研究方向为VOCs环保治理及炭材料制备。E-mail：1215414480@qq.com。

Pore forming mechanism and ethyl acetate adsorption performance of coal-biomass based activated carbon

JIN Chunjiang¹^,²^,³(), WANG Luyuan¹^,²(), CHEN Huimin³, CHENG Xingxing⁴, ZHANG Xingyu², SUN Rongfeng¹^,², GENG Wenguang¹^,², QIU Hongbo⁵

^1.Energy Research Institute of Shandong Academy of Sciences, Ji’nan 250014, Shandong, China
^2.School of Energy and Power Engineering, Qilu University of Technology, Ji’nan 250014, Shandong, China
^3.Changji University, Changji 831100, Xinjiang, China
^4.School of Energy and Power Engineering, Shandong University, Ji’nan 250061, Shandong, China
^5.Shandong Guoshun Construction Group Co. , Ltd. , Ji’nan 250300, Shandong, China

Received:2021-03-19 Revised:2021-04-24 Online:2021-11-12 Published:2021-11-12
Contact: WANG Luyuan

摘要/Abstract

摘要：

以CO₂为活化气氛，通过一步快速热解活化法从黑山煤粉与生物质混合物中制取活性炭。讨论了不同质量比率、活化温度和CO₂浓度对活性炭比表面积的影响。通过N₂吸附（BET）、扫描电镜（SEM）、拉曼光谱（Raman）和红外光谱（FTIR）对活性炭的性能进行了表征。确定了制备活性炭的最佳条件为活化温度900℃、质量比1、CO₂体积分数30%、活化时间120min时，活性炭的比表面积和孔容最大，分别为901m²/g和0.39cm³/g。最后，用乙酸乙酯吸附量验证了其吸附性能，最大累积吸附量为766.51mg/g。

关键词: 煤, 生物质, 活化, 活性炭, 吸附

Abstract:

Activated carbon was prepared from the mixture of Heishan coal powder and biomass by one step rapid pyrolysis activation method with CO₂ as activation atmosphere. The effects of different mass ratio, activation temperature and CO₂ concentration on the specific surface area of activated carbon were discussed. The properties of activated carbon were characterized by N₂ adsorption (BET), scanning electron microscopy (SEM), Raman spectroscopy (Raman) and infrared spectroscopy (FTIR). The optimum conditions for preparation of activated carbon were determined as follows: when the activation temperature was 900℃, the mass ratio was 1, the concentration of CO₂ was 30%, and the activation time was 120min, the specific surface area and pore volume of activated carbon were the largest, which were 910m²/g and 0.39cm³/g, respectively. The adsorption capacity of activated carbon was verified by the adsorption capacity of ethyl acetate, and the maximum cumulative adsorption capacity was 766.51mg/g.

Key words: coal, biomass, activation, activated carbon, adsorption

中图分类号:

金春江, 王鲁元, 陈惠敏, 程星星, 张兴宇, 孙荣峰, 耿文广, 仇洪波. 煤-生物质基活性炭成孔机制及其吸附乙酸乙酯的性能[J]. 化工进展, 2021, 40(S2): 162-175.

JIN Chunjiang, WANG Luyuan, CHEN Huimin, CHENG Xingxing, ZHANG Xingyu, SUN Rongfeng, GENG Wenguang, QIU Hongbo. Pore forming mechanism and ethyl acetate adsorption performance of coal-biomass based activated carbon[J]. Chemical Industry and Engineering Progress, 2021, 40(S2): 162-175.

图/表 21

表1 黑山煤和野生桃核的工业分析和元素分析

原料	工业分析/%				元素分析/%
原料	水分	灰分	挥发分	固定碳	碳	氢	氮	硫	氧	水分
黑山煤	3.68	35.32	38.83	5.36	83.46	54.10	4.84	30.7	0.53	0.79
野生桃核	6.84	71.43	80.32	4.23	17.5	44.7	5.08	37.74	0.88	0.53

表2 设计对比试验条件

可变条件	取值
煤与生物质质量比	0.2	0.5	1	1.5
温度/℃	600	700	800	900
CO₂含量/%	10	20	30

图1 不同煤粉/生物质质量比下制备的ACs的氮吸附-解吸等温线和QSDFT孔径分布

图2 不同煤粉/生物质粉比例下制备的ACs比表面积，孔容和孔径

图3 不同煤粉/生物质质量比下的SEM图

图4 不同煤粉/生物质质量比下的FTIR光谱图（插图为局部放大图）

图5 活性炭的Raman光谱

图6 不同温度下ACs的氮吸附-解吸等温线和QSDFT孔径分布

图7 不同温度下制备的ACs的比表面积、孔体积和孔径

图8 不同温度下制备的ACs的SEM形貌

图9 不同温度下的FTIR光谱图（插图为局部放大图）

图10 不同温度下的Raman光谱

图11 氮气吸附-解吸等温线和不同CO2浓度下制备的ACs的QSDFT孔径分布

图12 不同CO2体积分数下制备的ACs的比表面积、孔体积和孔径

图13 不同CO2体积分数下制备的ACs的扫描电镜形貌

图14 不同CO2浓度下制备的ACs的FTIR光谱图（插图为局部放大图）

图15 不同CO2含量下制备的ACs的Raman光谱

图16 900℃，20% CO2，煤与生物质的质量比为1∶1时孔隙结构构造示意图

图17 乙酸乙酯在不同条件下制备的ACs吸附穿透曲线

图18 乙酸乙酯在不同条件下制备的ACs累积吸附量曲线

图19 ACs吸附机理图

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煤-生物质基活性炭成孔机制及其吸附乙酸乙酯的性能

Pore forming mechanism and ethyl acetate adsorption performance of coal-biomass based activated carbon

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