雷嗣远,王思源,何川,张伟,王乐乐,汪华,刘鹏,陈宝康,周长松

• 1:西安热工研究院有限公司苏州分公司
• 2:华能重庆两江燃机发电有限责任公司
• 3:南京师范大学能源与机械工程学院

摘要(Abstract)：

利用不同质量的K_2CO_3和PEI将TiO_2表面功能化并深入研究CO_2的吸附性能和机理；通过超声浸渍法，以K_2CO_3和聚乙烯亚胺（PEI）为功能化材料，以商用选择性催化还原（SCR）催化剂白胚（多孔型TiO_2）为载体成功制备CO_2低温吸附剂；利用XRD、DTG、FTIR和XPS表征测试改性吸附剂的理化特性。结果表明：K_2CO_3和PEI可活化多孔型TiO_2孔隙结构，并提高表面碱性活性中心的密度，不仅有助于提升PEI和K_2CO_3的容纳能力，还有利于吸附活性位点的暴露以及CO_2的扩散与吸附；PEI负载可引入大量活性官能团和碱性胺位点，对CO_2的吸附容量可达2.11 mmol/g。通过测量50%PEI@TiO_2吸附剂对CO_2的吸附量以及Langmuir、Freundlich吸附等温线模型的拟合发现，CO_2以物理吸附为主，吸附时范德华力起主要作用；CO_2最佳吸、脱附温度分别为50℃和110℃。循环实验表明，与PEI相比，K_2CO_3负载Ti O_2更稳定，30次循环后CO_2吸附容量下降不超过10%，表明以商用SCR催化剂白胚为载体的功能化材料有望应用于烟气CO_2低温捕集。

关键词(KeyWords)： 碳捕集;低温吸附;功能化;TiO_2载体;循环利用

Abstract:

Keywords:

基金项目(Foundation): 国家重点研发计划项目（2023YFB4104000）;; 西安热工研究院有限公司院自立科技项目（GU-23-TYK20）~~

作者(Author): 雷嗣远,王思源,何川,张伟,王乐乐,汪华,刘鹏,陈宝康,周长松

DOI: 10.19666/j.rlfd.202412190

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