化工进展 ›› 2023, Vol. 42 ›› Issue (3): 1540-1550.DOI: 10.16085/j.issn.1000-6613.2022-2305

• 材料科学与技术 • 上一篇    下一篇

基于超交联聚合物前体的碳载钾基CO2吸附剂制备和性能

陈崇明1(), 曾四鸣1, 罗小娜2, 宋国升1, 韩忠阁1, 郁金星3(), 孙楠楠2   

  1. 1.国网河北省电力有限公司电力科学研究院,河北 石家庄 050021
    2.中国科学院上海高等研究院,上海 201210
    3.国网河北能源技术服务有限公司,河北 石家庄 050021
  • 收稿日期:2022-12-11 修回日期:2023-02-09 出版日期:2023-03-15 发布日期:2023-04-10
  • 通讯作者: 郁金星
  • 作者简介:陈崇明(1983—),男,高级工程师,研究方向为烟气污染物治理技术。E-mail:dyy_chencm@163.com
  • 基金资助:
    国网河北能源技术服务有限公司自主项目(TSS2021-06)

Preparation and performance of carbon supported potassium-based CO2 adsorbent derived from hyper-cross linked polymers

CHEN Chongming1(), ZENG Siming1, LUO Xiaona2, SONG Guosheng1, HAN Zhongge1, YU Jinxing3(), SUN Nannan2   

  1. 1.State Grid Hebei Electric Power Research Institute, Shijiazhuang 050021, Hebei, China
    2.Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201210, China
    3.State Grid Hebei Energy Technology Service Co. , Ltd. , Shijiazhuang 050021, Hebei, China
  • Received:2022-12-11 Revised:2023-02-09 Online:2023-03-15 Published:2023-04-10
  • Contact: YU Jinxing

摘要:

面向降低碳捕集技术成本的重大需求,针对高性能吸附剂开发这一关键问题,以廉价的苯为原料,基于Friedel-Crafts烷基化反应,以二甲醇缩甲醛为交联剂合成了聚合物材料,将其作为前体制备了一种新的碳载钾基CO2吸附剂。通过固体核磁、红外光谱、电子显微镜、X射线粉末衍射、N2物理吸附等表征手段,发现所合成的聚合物前体具有超交联多孔结构,通过表面氧化改性的方法可实现多种含氧官能团的修饰,这些含氧官能团具有锚定钾离子的作用,因此可通过离子交换的方式实现表面的钾改性。经过进一步的高温炭化后,可获取全新的碳载钾基CO2吸附剂。该类吸附剂上的含钾位点具有较好的分散性,能够与CO2发生可逆化学反应,其在模拟烟气下的CO2吸附量达到了1.63mmol/g,且循环稳定性良好,具有一定的应用潜力。

关键词: 二氧化碳, 捕集, 碳材料, 减排, 碳中和

Abstract:

In view of the significant demand for reducing the cost of carbon capture and the key problem of developing high-performance adsorbents, a new carbon supported potassium-based CO2 adsorbent was prepared from a polymer precursor derived from Friedel Crafts alkylation between benzene and dimethyl acetal. By means of solid nuclear magnetic resonance, infrared spectroscopy, electron microscopy, X-ray powder diffraction, N2 physical adsorption and other characterization methods, it was found that the synthesized polymer precursor had a hyper-crosslinked porous structure, and the modification of a variety of oxygen-containing functional groups could be achieved by surface oxidation modification. These oxygen-containing functional groups had the function of anchoring potassium ions, and thus the surface potassium modification can be achieved by ion exchange. After further high-temperature carbonization, a new carbon supported potassium-based CO2 adsorbent can be obtained. The potassium sites on the adsorbent had good dispersibility and could react reversibly with CO2. The CO2 adsorption capacity of the adsorbent under the simulated flue gas reached 1.63mmol/g with good cyclic stability, which endowed the adsorbent with promising application potential.

Key words: carbon dioxide, capture, carbon materials, emission reduction, carbon neutrality

中图分类号: 

京ICP备12046843号-2;京公网安备 11010102001994号
版权所有 © 《化工进展》编辑部
地址:北京市东城区青年湖南街13号 邮编:100011
电子信箱:hgjz@cip.com.cn
本系统由北京玛格泰克科技发展有限公司设计开发 技术支持:support@magtech.com.cn