| Title: | Enhancements on volatile organic compounds (VOCs) adsorption and desorption performance of ZSM-5 by fabricating hierarchical MCM-41 |
| Author(s): | Yue X; Wang S; Wang S; Ding W; |
| Address: | "College of Materials Science and Engineering, Dalian Jiaotong University, Dalian, 116028, China. Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China. Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China. wangsheng@dicp.ac.cn" |
| Journal Title: | Environ Sci Pollut Res Int |
| DOI: | 10.1007/s11356-023-29483-9 |
| ISSN/ISBN: | 1614-7499 (Electronic) 0944-1344 (Linking) |
| Abstract: | "ZSM-5 zeolite has been considered a promising adsorbent for capturing VOCs. However, its hydrophilicity and narrow micropore structure limit their practical application especially under humid atmospheres. In this study, the pure silica mesoporous molecular sieve MCM-41 was assembled on ZSM-5 zeolite with different SiO(2)/Al(2)O(3) ratios (SARs) via a surfactant-mediated recrystallization method. Then, its adsorption-desorption behaviors were investigated using n-hexane, toluene, and ethyl acetate as VOC model molecules. The results showed that the hydrophobicity of ZSM-5/MCM-41 composites and their VOC diffusion behaviors were significantly improved. Furthermore, the SARs of the ZSM-5 precursors had a remarkable influence on the adsorption performance of ZSM-5/MCM-41 composites. ZSM-5/MCM-41(130) was the optimum option, and its dynamic adsorption capacity for ethyl acetate (111.30 mg.g(-1)) was higher than that of the corresponding ZSM-5 zeolites even under statured humidity. Meanwhile, the ratios of dynamic adsorption capacities at humid and dry atmospheres (q(s,wet)/q(s,dry)) of ZSM-5/MCM-41(130) for n-hexane, toluene, and ethyl acetate were 84.89%, 61.46%, and 73.81% respectively. The results will provide guidelines for the preparation of hydrophobic adsorbents" |
| Keywords: | Silicon Dioxide/chemistry *Volatile Organic Compounds/chemistry Adsorption *Zeolites/chemistry Toluene/chemistry Adsorption behavior Desorption behavior Hydrophobicity SiO2/Al2O3 VOCs Zsm-5/mcm-41; |
| Notes: | "MedlineYue, Xu Wang, Sheng Wang, Shudong Ding, Wanyu eng 2022YFB3504200/National Key Research and Development Program of China/ U20A20132/National Natural Science Foundation of China/ 52072056/National Natural Science Foundation of China/ Germany 2023/08/30 Environ Sci Pollut Res Int. 2023 Sep; 30(45):100907-100919. doi: 10.1007/s11356-023-29483-9. Epub 2023 Aug 29" |
