Chemical Industry and Engineering Progress ›› 2023, Vol. 42 ›› Issue (9): 5011-5018.DOI: 10.16085/j.issn.1000-6613.2022-1851

• Resources and environmental engineering • Previous Articles     Next Articles

Coal tar phenol-based carbon nanosphere prepared by Stöber method for adsorption of CO2

YANG Ying1(), HOU Haojie2,3, HUANG Rui2,3, CUI Yu1, WANG Bing2,3(), LIU Jian4, BAO Weiren2,3, CHANG Liping2,3, WANG Jiancheng2,3, HAN Lina1()   

  1. 1.College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China
    2.State Key Laboratory of Clean and Efficient Coal Utilization, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China
    3.Key Laboratory of Coal Science and Technology, Ministry of Education, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China
    4.Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning, China
  • Received:2022-10-08 Revised:2022-11-24 Online:2023-09-28 Published:2023-09-15
  • Contact: WANG Bing, HAN Lina

利用煤焦油中酚类物质Stöber法制备碳纳米球用于CO2吸附

杨莹1(), 侯豪杰2,3, 黄瑞2,3, 崔煜1, 王兵2,3(), 刘健4, 鲍卫仁2,3, 常丽萍2,3, 王建成2,3, 韩丽娜1()   

  1. 1.太原理工大学材料科学与工程学院,山西 太原 030024
    2.太原理工大学省部共建煤基能源清洁高效利用国家重点实验室,山西 太原 030024
    3.太原理工大学煤科学与技术教育部重点实验室,山西 太原 030024
    4.中国科学院大连化学物理研究所,辽宁 大连 116023
  • 通讯作者: 王兵,韩丽娜
  • 作者简介:杨莹(1998—),女,硕士研究生,研究方向为大气污染物化学和分子筛催化材料。E-mail:yang_ying996@163.com
  • 基金资助:
    国家自然科学基金联合基金(U1710107);晋中市科技重点研发计划(Y201002)

Abstract:

Emission and direct utilization of coal tar caused severe environmental pollution. Thus, developing a green synthesis method and application of high-valued materials is critical to the utilization of coal tar. Herein, we successfully fabricated porous carbon nanosphere as CO2 adsorbent using resorcinol and medium- and low-temperature coal tar as carbon sources to polymerize with formaldehyde via the Stöber method. The samples were tested and analyzed by scanning electron microscopy, N2 adsorption-desorption, Fourier transform infrared absorption spectroscopy, and X-ray diffraction. We investigated the effects of pre-polymerization temperature, hydrothermal temperature, and coal tar ratio on the pore structure and adsorption performance of CO2. When the pre-polymerization and hydrothermal temperatures were 60℃ and 200℃, respectively, the product had the highest specific surface and CO2 adsorption capacity. The specific surface area of the C1-R1-RT-200 adsorbent was 787m2/g with the CO2 adsorption capacity of 4.64mmol/g. The product had better CO2 adsorption capacity when the mass fraction of coal tar was 50%—76%, which was much higher than that synthesized using the pure resorcinol model compounds. The CO2 adsorption isotherm of the prepared porous carbon nanospheres matched well with the Langmuir isotherm model, indicating that the CO2 adsorption of the porous carbon nanospheres was a monolayer adsorption. Our work could contribute to developing the green synthesis method for coal tar-based CO2 adsorbents.

Key words: CO2 capture, adsorption, nanomaterials, carbon nanospheres, St?ber method, medium- and low-temperature coal tar

摘要:

煤焦油的排放和直接利用会造成严重的环境污染,开发高附加值材料的绿色合成方法及应用是煤焦油利用的关键。本文采用Stöber法以间苯二酚和中低温煤焦油为碳源与甲醛聚合制备了多孔碳纳米球CO2吸附剂,通过扫描电子显微镜、N2吸附-脱附测试、傅里叶变换红外吸收光谱、X射线衍射等手段对样品进行测试和分析。考察了预聚温度、水热温度和煤焦油添加量对碳纳米球的孔结构和CO2吸附性能的影响。预聚温度为60℃、水热温度为200℃时,产物具有最优异的比表面积和CO2吸附性能。C1-R1-RT-200吸附剂的比表面积达到787m2/g,CO2最大吸附量为4.64mmol/g。当煤焦油占总投料质量的50%~76%时,产物的CO2吸附性能较好,优于纯的间苯二酚模型化合物。所制备的多孔碳纳米球的CO2吸附等温线可以很好地吻合Langmuir等温线模型,说明多孔碳纳米球对CO2的吸附为单分子层吸附。

关键词: CO2捕集, 吸附, 纳米材料, 碳纳米球, St?ber法, 中低温煤焦油

CLC Number: 

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