Details

Autor(en) / Beteiligte

• Yao, Jinze
• Zhao, Zhiwei
• Yu, Liang
• Huang, Jiajin
• Shen, Shigen
• Zhao, Siyao
• Wu, Ying
• Tian, Xiangyang
• Wang, Jun
• Xia, Qibin

Titel

Boosting trace SO adsorption and separation performance by the modulation of the SBU metal component of iron-based bimetal MOFs

Ist Teil von

• Journal of materials chemistry. A, Materials for energy and sustainability, 2023-07, Vol.11 (27), p.14728-14737

Erscheinungsjahr

2023

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• The development of effective adsorbents for the removal of trace SO 2 from flue gas is extremely challenging. Herein, we investigated the effect of metal modulation on the SO 2 adsorption and separation performance of MOF materials through PCN-250(Fe) (PCN stands for porous coordination network) and four bimetal PCN-250 materials, including PCN-250(Fe 2 Co), PCN-250(Fe 2 Ni), PCN-250(Fe 2 Mn) and PCN-250(Fe 2 Zn). Among the five materials, PCN-250(Fe 2 Ni) exhibited the highest SO 2 uptake of 8.64 mmol g −1 at 0.1 bar and 298 K, while PCN-250(Fe 2 Zn) showed the largest SO 2 /CO 2 IAST selectivity of 49. Dynamic breakthrough experiments revealed that PCN-250(Fe 2 Zn) exhibited the most outstanding separation performances among the five materials, even with water vapor and real flue-gas compositions. Molecular simulations indicated that PCN-250(Fe 2 Zn) possessed additional adsorption sites and captured SO 2 through multiple O δ − H δ + hydrogen bonds. Charge difference calculations showed that the non-overlapping charge distribution of Zn and O in PCN-250(Fe 2 Zn) made it more effective for SO 2 capture. The effect of metal modulation on the SO 2 adsorption and separation performance of MOF materials.