Chen Yilan, Wu Junjie, Wang Xin, Liu Minyi, Liu Yamin
School of Ecological Environment and Urban Construction, Fujian University of Technology, Fuzhou 350118, China.
Fuzhou Smart Environmental Industry Technology Innovation Center, Fuzhou 350118, China.
Molecules. 2022 May 26;27(11):3429. doi: 10.3390/molecules27113429.
An efficient CO adsorbent with a hierarchically micro-mesoporous structure and a large number of amine groups was fabricated by a two-step synthesis technique. Its structural properties, surface groups, thermal stability and CO adsorption performance were fully investigated. The analysis results show that the prepared CO adsorbent has a specific hierarchically micro-mesoporous structure and highly uniformly dispersed amine groups that are favorable for the adsorption of CO. At the same time, the CO adsorption capacity of the prepared adsorbent can reach a maximum of 3.32 mmol-CO/g-adsorbent in the actual flue gas temperature range of 303-343 K. In addition, the kinetic analysis results indicate that both the adsorption process and the desorption process have rapid adsorption/desorption rates. Finally, the fitting of the CO adsorption/desorption experimental data by Avrami's fractional kinetic model shows that the CO adsorption rate is mainly controlled by the intra-particle diffusion rate, and the temperature has little effect on the adsorption rate.
通过两步合成技术制备了一种具有分级微介孔结构和大量胺基的高效CO吸附剂。对其结构性质、表面基团、热稳定性和CO吸附性能进行了全面研究。分析结果表明，所制备的CO吸附剂具有特定的分级微介孔结构和高度均匀分散的胺基，有利于CO的吸附。同时，在所制备的吸附剂在303-343K的实际烟气温度范围内，CO吸附容量最高可达3.32 mmol-CO/g-吸附剂。此外，动力学分析结果表明，吸附过程和解吸过程均具有快速的吸附/解吸速率。最后，用Avrami分数动力学模型对CO吸附/解吸实验数据进行拟合，结果表明CO吸附速率主要受颗粒内扩散速率控制，温度对吸附速率影响较小。
