Xie Yucong, Zheng Chao, Lan Liang, Song Hua, Kang Jian, Kang Kai, Bai Shupei
School of Light Industry and Engineering, South China University of Technology, Guangzhou 510640, China.
State Key Laboratory of NBC Protection for Civilian, Beijing 102205, China.
Nanomaterials (Basel). 2023 Sep 28;13(19):2661. doi: 10.3390/nano13192661.
Granular activated carbon (GAC) has proven to be an effective adsorbent for removing the chemical warfare agent sarin (GB) and simulants like Dimethyl methylphosphonate (DMMP). However, it comes with certain limitations, including inadequate contact efficiency, notable mass transfer resistance, and lower bed utilization efficiency. This study synthesized steel fiber-entrapped activated carbon composites (SFEACs), which exhibited a maximum adsorption capacity of 285.3 mg/g at 303 K. Compared with the packed bed (PB) filled with GAC, while the adsorption capacity of SFEACS decreased, there was a substantial increase in the adsorption mass transfer rate. These SFEACs were combined with GAC to create a structural fixed bed (SFB), which demonstrated excellent performance in DMMP removal. Under identical experimental conditions, the DMMP breakthrough curve of SFB exhibited a steeper profile compared to the packed bed (PB) filled with GAC at the same bed height, and the breakthrough time against DMMP vapor could be extended by 13.8%. Furthermore, the adsorption rate constant of the Yoon-Nelson model increased by more than 17.6%, and the unused bed length, according to the Wheeler-Jonas model, decreased by more than 14%.
颗粒活性炭（GAC）已被证明是一种有效的吸附剂，可用于去除化学战剂沙林（GB）和类似甲基膦酸二甲酯（DMMP）的模拟剂。然而，它存在一定的局限性，包括接触效率不足、显著的传质阻力和较低的床层利用效率。本研究合成了钢纤维包裹活性炭复合材料（SFEACs），其在303 K时表现出最大吸附容量为285.3 mg/g。与填充GAC的填充床（PB）相比，虽然SFEACS的吸附容量有所下降，但吸附传质速率大幅提高。这些SFEACs与GAC结合形成了结构固定床（SFB），在去除DMMP方面表现出优异的性能。在相同的实验条件下，SFB的DMMP穿透曲线与相同床层高度下填充GAC的填充床（PB）相比更为陡峭，并且针对DMMP蒸汽的穿透时间可延长13.8%。此外，Yoon-Nelson模型的吸附速率常数增加了超过17.6%，根据Wheeler-Jonas模型，未使用床层长度减少了超过14%。
