DETA功能化多孔颗粒吸附CO2特性研究
Study on CO2 Adsorption Characteristics of DETA Functionalized Porous Particles
王明君 1亓冠圣1
作者信息
- 1. 山东科技大学 安全与环境工程学院,山东 青岛 266590
- 折叠
摘要
为实现绿色、高效碳捕集,本研究利用生产废渣合成多孔颗粒,并通过二乙烯三胺(DETA)功能化以提高其CO2吸附性能.通过低温氮气吸附-脱附、傅里叶红外光谱等手段对新型吸附剂进行表征,利用固定床吸附装置测试了其CO2吸附特性.结果表明,DETA的持续负载未破坏颗粒的多级孔结构;多孔颗粒的最佳DETA负载量为25%,CO2吸附能力较功能化前显著提高,常温常压下CO2吸附量可达87.25 mg/g.红外测试证实了氨基甲酸酯的生成,吸附动力学显示了化学吸附的主导地位,吸附剂对CO2具备良好的吸附选择性.本研究有助于促进生产废料的综合利用以及推动碳捕集工艺持续发展.
Abstract
To achieve green and efficient carbon capture,this study synthesized porous particles from production waste and functionalized them with diethylenetriamine(DETA)to improve their CO2 adsorption performance.The novel adsorbent was characterized by low-temperature nitrogen adsorption desorption and Fourier transform infrared spectroscopy,and its CO2 adsorption characteristics were tested using a fixed bed adsorption device.The results showed that the continuous loading of DETA did not damage the multi-level pore structure of the particles;The optimal DETA loading rate for porous particles is 25%,and the CO2 adsorption capacity is significantly improved compared to before functionalization.The CO2 adsorption capacity can reach 87.25 mg/g at room temperature and pressure.Infrared testing confirmed the generation of carbamate,adsorption kinetics showed the dominant position of chemical adsorption,and the adsorbent had good adsorption selectivity for CO2.This study contributes to promoting the comprehensive utilization of production waste and promoting the sustainable development of carbon capture processes.
关键词
多孔颗粒/胺功能化/CO2/吸附Key words
porous particles/amino-functionalization/CO2/adsorption引用本文复制引用
基金项目
国家自然科学基金(52374216)
山东省自然科学基金(ZR2023ME074)
出版年
2024
NETL
NSTL
万方数据