一步快速活化法制备生物质活性炭及其对乙酸乙酯的吸附再生

doi:10.16085/j.issn.1000-6613.2020-2359

化工进展 ›› 2021, Vol. 40 ›› Issue (S1): 446-455.DOI: 10.16085/j.issn.1000-6613.2020-2359

一步快速活化法制备生物质活性炭及其对乙酸乙酯的吸附再生

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

^1.山东省科学院能源研究所，山东济南 250014
^2.齐鲁工业大学（山东科学院）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

收稿日期:2020-11-25 修回日期:2021-02-21 出版日期:2021-10-25 发布日期:2021-11-09
通讯作者: 王鲁元
作者简介:金春江（1994—），硕士研究生，主要研究方向为挥发性有机化合物（VOCs）环保治理及炭材料制备。E-mail：1215414480@qq.com。
基金资助:
国家自然科学基金(51906130);山东省自然科学基金(ZR2019BEE053);山东省重点实验室能源碳减排技术与资源化利用实验室(ECRRU201804)

Preparation of biomass activated carbon by one step rapid activation and its adsorption regeneration for ethyl acetate

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

^1.Energy Research Institute of Shandong Academy of Sciences, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250014, Shandong, China
^2.School of Energy and Power Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250014, Shandong, China
^3.Changji University, Changji 831100, Xinjiang, China
^4.School of Energy and Power Engineering, Shandong University, Jinan 250061, Shandong, China

Received:2020-11-25 Revised:2021-02-21 Online:2021-10-25 Published:2021-11-09
Contact: WANG Luyuan

摘要/Abstract

摘要：

活性炭吸附法因技术成熟、简单易行、吸附效率高等优点而被广泛应用于挥发性有机化合物（VOCs）的处理中。本文以山林废弃物的野山桃核为原料，烟道废气及硝酸铁为活化剂，制备了一系列生物质活性炭，并利用固定床吸附装置对其吸附、再生性能进行了研究。利用二氧化碳和水蒸气模拟烟气，在固定流量的烟气活化氛围中进行活化，并探讨了不同硝酸铁的量对活性炭的孔隙结构及其吸附再生性能的影响。利用N₂吸附-脱附实验、扫描电镜、拉曼光谱和红外光谱等技术研究了活性炭详细特征。结果表明：当硝酸铁的质量分数为0.2% 时，所制备的活性炭AC-3具有最大的比表面积和平均孔径，分别为923m2/g及2.57nm。其对乙酸乙酯的饱和吸附量也最大，为973.04mg/g。利用烟气对AC-3活性炭进行活化再生处理，经过3次重复吸附-解吸再生实验，其饱和吸附能力仍可达91.5％以上，实现了废弃烟气资源化利用及活性炭的循环回收，从而达到废气治理的目标。

关键词: 生物质, 活性炭, 吸附, 再生

Abstract:

Volatile organic compounds (VOCs) are important precursors of photochemical smog, which have a great impact on the formation of tropospheric ozone and secondary fine particle pollutants, and are the focus of current atmospheric environmental pollution research. At present, activated carbon adsorption method is widely used in the treatment of VOCs because of its mature technology, simple operation and high adsorption efficiency. In this paper, a series of activated carbons were prepared from wild hickory as raw materials, flue gas and ferric nitrate as activators, and their adsorption and regeneration properties were studied by fixed bed adsorption device. Carbon dioxide and water vapor were used to simulate flue gas and activated in a fixed flow flue gas activation atmosphere. The effects of carbon dioxide and water vapor in flue gas and different amounts of ferric nitrate on pore structure and adsorption regeneration performance of activated carbon were discussed. The detailed characteristics of activated carbon were studied by N₂ adsorption desorption experiment, SEM, Raman and FTIR. The results show that when the mass fraction of ferric nitrate is 0.2%, the AC-3 has the largest specific surface area and average pore volume, which are 923m²/g and 2.57nm, respectively. Its saturated adsorption capacity for VOCs ethyl acetate was 973.04mg/g. In this experiment, AC-3 activated carbon was activated and regenerated by flue gas. After three repeated adsorption desorption regeneration experiments, the saturated adsorption capacity of AC-3 activated carbon was still above 91.5%. The waste flue gas resource utilization and activated carbon recycling were realized, so as to achieve the goal of waste gas pollution adsorption treatment.

Key words: biomass, activated carbon, adsorption, regeneration

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. 一步快速活化法制备生物质活性炭及其对乙酸乙酯的吸附再生[J]. 化工进展, 2021, 40(S1): 446-455.

JIN Chunjiang, WANG Luyuan, CHEN Huimin, CHENG Xingxing, ZHANG Xingyu, SUN Rongfeng, GENG Wenguang. Preparation of biomass activated carbon by one step rapid activation and its adsorption regeneration for ethyl acetate[J]. Chemical Industry and Engineering Progress, 2021, 40(S1): 446-455.

图/表 12

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工业分析/%（空干基）					元素分析/%（干燥无灰基）
水分	灰分	挥发分	固定碳		碳	氢	氮	硫	氧
2.15	4.41	80.24	13.00		50.67	4.811	0.56	0.098	37.149

工业分析/%（空干基）					元素分析/%（干燥无灰基）
水分	灰分	挥发分	固定碳		碳	氢	氮	硫	氧
2.15	4.41	80.24	13.00		50.67	4.811	0.56	0.098	37.149

ACs样品	比表面积 /m2 · g^-1	微孔比表面积/m2 · g^-1	总孔容 /cm³ · g^-1	微孔孔容 /cm³ · g^-1	平均孔径/nm
AC	388	358.34	0.27	0.21	2.74
AC-1	657	573.63	0.29	0.25	1.70
AC-2	679	593.63	0.40	0.33	2.50
AC-3	923	792.16	0.59	0.46	2.57
AC-4	631	559.12	0.37	0.32	2.34

ACs样品	比表面积 /m2 · g^-1	微孔比表面积/m2 · g^-1	总孔容 /cm³ · g^-1	微孔孔容 /cm³ · g^-1	平均孔径/nm
AC	388	358.34	0.27	0.21	2.74
AC-1	657	573.63	0.29	0.25	1.70
AC-2	679	593.63	0.40	0.33	2.50
AC-3	923	792.16	0.59	0.46	2.57
AC-4	631	559.12	0.37	0.32	2.34

AC	q_e/mg · g^-1	K	n	R²
AC	504.427	0.062	1.19	0.993
AC-1	682.853	0.0036	1.20	0.984
AC-2	713.628	0.0104	1.05	0.987
AC-3	1008.923	0.0023	1.17	0.985
AC-4	498.524	0.0055	1.09	0.997

一步快速活化法制备生物质活性炭及其对乙酸乙酯的吸附再生

Preparation of biomass activated carbon by one step rapid activation and its adsorption regeneration for ethyl acetate

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