School of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, China.
School of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, China.
J Hazard Mater. 2021 Feb 15;404(Pt A):124101. doi: 10.1016/j.jhazmat.2020.124101. Epub 2020 Oct 1.
A novel class of hybrid solvents (mEIP:Tetz) comprising of N-methylated ethylene imine polymer (mEIP) and 1-ethyl-3-methylimidazolium tetrazolate ([Emim][Tetz]) were developed for the highly efficient and reversible capture of SO. The synergistic interactions rather than simple mixing between mEIP and [Emim][Tetz] were confirmed by Fourier transform infrared spectroscopy (FTIR), nuclear magnetic resonance (NMR) and density functional theory (DFT) calculations. Besides, it was experimentally demonstrated that mEIP:Tetz mixtures exhibited improved kinetics for SO absorption, and the production of viscous solids were completely eliminated, compared with using mEIP alone. More significantly, an exceedingly high solubility of 0.308 g SO·g absorbent in 2mEIP:8Tetz was received for trapping SO from simulated flue gas containing 2000 ppm SO, which was much higher than most of the results reported in previous literatures under the same conditions. Finally, the absorption and desorption mechanisms were proposed according to the results of FTIR and H NMR analysis.
开发了一类新型的混合溶剂（mEIP:Tetz），包含 N-甲基化乙撑亚胺聚合物（mEIP）和 1-乙基-3-甲基咪唑四唑盐（[Emim][Tetz]），用于高效且可重复地捕获 SO。傅里叶变换红外光谱（FTIR）、核磁共振（NMR）和密度泛函理论（DFT）计算证实了 mEIP 和 [Emim][Tetz] 之间的协同相互作用，而不是简单的混合。此外，实验表明，与单独使用 mEIP 相比，mEIP:Tetz 混合物对 SO 的吸收具有更快的动力学，并且完全消除了粘性固体的生成。更重要的是，在模拟烟道气中含有 2000ppm SO 的情况下，从 2mEIP:8Tetz 中获得了 0.308g SO·g 吸收剂的极高溶解度，这比在相同条件下之前文献中的大多数结果都要高。最后，根据 FTIR 和 H NMR 分析的结果，提出了吸收和解吸机制。
