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 (H = 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.

中文翻译：

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一种稳定的 Zr(IV)-MOF，可在干燥和潮湿条件下有效去除烟气中的痕量 SO2

获得合适的吸附剂来选择性分离烟气中的SO仍然是一个重要的问题。通过四羧酸配体 (H = 4,4',4'',4'''-(1,4-亚苯基双) 的自组装可以方便地合成稳定的 Zr(IV)-MOF (Zr-PTBA) (氮杂三基))四苯甲酸)和ZrCl在微量水存在下。它呈现出三维多孔结构。 BET比表面积为1112.72 m/g，平均孔径分布集中在5.9、8.0和9.3 Å。有趣的是，Zr-PTBA 显示出对 SO 的选择性吸附。环境条件下最大吸收量达到223.21 cm/g。虽然它对CO的吸附量较低（30.50 cm/g），但几乎不吸附O（2.57 cm/g）和N（1.31 cm/g）。获得了较高的SO/CO（21.9）、SO/N（912.7）、SO/O（2269.9）和SO/CH（85.0）的IAST选择性，显示了其优异的气体分离性能。突破性实验进一步证实了其在干燥和潮湿条件下烟气深度脱硫的应用。此外，还通过理论计算研究了气体吸附结果和机理。