Ultralow Emissions of Low-Concentration SO2 in Flue Gas Using Azole-Based Ionic Liquids

IF 3.8 3区工程技术 Q2 ENGINEERING, CHEMICAL

Industrial & Engineering Chemistry Research Pub Date : 2024-12-03 DOI:10.1021/acs.iecr.4c03797

Lili Jiang, Zhenyu Zhao, Kaili Wang, Zhaowei Zhang, Wenjun Lin, Haoran Li, Congmin Wang

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Abstract

In recent years, ultralow emissions (ULE) have attracted more attention due to the stricter environmental pollution standards. Developing desulfurizers to meet the needs of ultralow emissions standards is pressingly needed. Herein, various ionic liquids (ILs) were designed using the basicity-tunable and cation-tunable strategies for the capture of 2000 ppm of SO₂ in flue gas. Furthermore, NMR spectra, FT-IR spectra, and DFT calculations, including noncovalent interaction (NCI) and reduced density gradient (RDG) analysis, were used to testify the absorption mechanism. Anions of ILs were proved to play a vital role in ultralow emissions, and [Bentriz] was regarded as an ideal anion for the ultralow emission in this work, while cations of ILs had little effect on ultralow emissions performance. [P₄₄₄₂][Bentriz] exhibited excellent ability of ultralow emissions (5 ppm), splendid removal efficiency (>99%), outstanding absorption capacity (1.03 mol SO₂/mol IL), and good reversibility (6 cycles).

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来源期刊

Industrial & Engineering Chemistry Research 工程技术-工程：化工

CiteScore

7.40

自引率

7.10%

发文量

1467

审稿时长

2.8 months

期刊介绍： ndustrial & Engineering Chemistry, with variations in title and format, has been published since 1909 by the American Chemical Society. Industrial & Engineering Chemistry Research is a weekly publication that reports industrial and academic research in the broad fields of applied chemistry and chemical engineering with special focus on fundamentals, processes, and products.