Gang Shu-Qi, Liu Zi-Yue, Wu Su-Xia, Yang Shu, Wang Ruihan, Du Jian-Long
State Key Laboratory of New Pharmaceutical Preparations and Excipients, Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of Ministry of Education, Key Laboratory of Chemical Biology of Hebei Province (No. 22567635H), College of Chemistry and Materials Science, Hebei University, Baoding 071002, China.
Hebei Normal University of Science and Technology, Qinhuangdao 066600, China.
J Hazard Mater. 2024 May 15;470:134180. doi: 10.1016/j.jhazmat.2024.134180. Epub 2024 Mar 30.
Obtaining suitable adsorbents for selective separation of SO from flue gas still remains an important issue. A stable Zr(IV)-MOF (Zr-PTBA) can be conveniently synthesized through the self-assembly of a tetracarboxylic acid ligand (HL = 4,4',4'',4'''-(1,4-phenylenebis(azanetriyl))tetrabenzoic acid) and ZrCl in the presence of trace water. It exhibits a three-dimensional porous structure. The BET surface area is 1112.72 m/g and the average pore size distribution focus on 5.9, 8.0 and 9.3 Å. Interestingly, Zr-PTBA shows selective adsorption of SO. The maximum uptake reaches 223.21 cm/g at ambient condition. While it exhibits lower adsorption uptake of CO (30.50 cm/g) and hardly adsorbs O (2.57 cm/g) and N (1.31 cm/g). Higher IAST selectivities of SO/CO (21.9), SO/N (912.7), SO/O (2269.9) and SO/CH (85.0) have been obtained, which reveal its' excellent gas separation performance. Breakthrough experiment further confirms its application for flue gas deep desulfurization both in dry and humid conditions. Furthermore, the gas adsorption results and mechanisms have also been studied by theoretical calculations.
获得用于从烟道气中选择性分离SO的合适吸附剂仍然是一个重要问题。一种稳定的Zr(IV)-MOF（Zr-PTBA）可以通过四羧酸配体（HL = 4,4',4'',4'''-(1,4-亚苯基双(氮杂三嗪基))四苯甲酸）和ZrCl在痕量水存在下的自组装方便地合成。它呈现出三维多孔结构。BET表面积为1112.72 m²/g，平均孔径分布集中在5.9、8.0和9.3 Å。有趣的是，Zr-PTBA对SO表现出选择性吸附。在环境条件下最大吸附量达到223.21 cm³/g。而它对CO的吸附量较低（30.50 cm³/g），几乎不吸附O₂（2.57 cm³/g）和N₂（1.31 cm³/g）。获得了较高的SO/CO（21.9）、SO/N₂（912.7）、SO/O₂（2269.9）和SO/CH₄（85.0）的IAST选择性，这表明其具有优异的气体分离性能。突破实验进一步证实了其在干燥和潮湿条件下用于烟道气深度脱硫的应用。此外，还通过理论计算研究了气体吸附结果和机理。
