Preparation of UiO-66-type adsorbents for the separation of SO2 from flue gas

IF 3 4区工程技术 Q3 CHEMISTRY, PHYSICAL Adsorption Pub Date : 2024-03-08 DOI:10.1007/s10450-024-00438-x

Yuling Ma, Airong Li, Zhihong Wang, Cheng Wang

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Abstract

There is an urgent need to address sulfur dioxide (SO₂) from the burning of fossil fuels, which poses a serious hazard to the surrounding environment due to its emission. In this work, UiO-66-type metal–organic framework materials (MOFs) were prepared by hydrothermal method and applied to flue gas desulfurization. Through characterization analysis, it was found that UiO-66 sample had high crystallinity and good thermal stability. Besides, UiO-66 sample had a large specific surface area (1423 m²/g) and a large pore volume (0.69 cm³/g). In the desulfurization experiments of SO₂/CO₂/O₂/N₂ gas mixture (0.3/10.0/5.5/84.2 vol.%), UiO-66 had a breakthrough time of 137.6 min/g for SO₂, the high selectivity of SO₂/CO₂ (36.0), and strong acid resistance. Besides, the adsorption thermodynamic analysis can confirm that the adsorption process of UiO-66 for SO₂ was a combination of physical adsorption and chemical adsorption. At 1.0 bar and 298 K, the adsorption capacity of SO₂ on UiO-66 reached 8.12 mmol/g.

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制备用于分离烟气中二氧化硫的 UiO-66 型吸附剂

化石燃料燃烧产生的二氧化硫（SO2）会对周围环境造成严重危害，因此迫切需要解决这一问题。本研究采用水热法制备了 UiO-66 型金属有机框架材料（MOFs），并将其应用于烟气脱硫。通过表征分析发现，UiO-66 样品具有较高的结晶度和良好的热稳定性。此外，UiO-66 样品具有较大的比表面积（1423 m2/g）和较大的孔隙体积（0.69 cm3/g）。在 SO2/CO2/O2/N2 混合气体（0.3/10.0/5.5/84.2 vol.%）的脱硫实验中，UiO-66 对 SO2 的突破时间为 137.6 分钟/克，对 SO2/CO2 的选择性高（36.0），耐酸性强。此外，吸附热力学分析证实，UiO-66 对 SO2 的吸附过程是物理吸附和化学吸附相结合的过程。在 1.0 巴和 298 K 条件下，UiO-66 对 SO2 的吸附容量达到 8.12 mmol/g。

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来源期刊

Adsorption 工程技术-工程：化工

CiteScore

8.10

自引率

3.00%

发文量

审稿时长

2.4 months

期刊介绍： The journal Adsorption provides authoritative information on adsorption and allied fields to scientists, engineers, and technologists throughout the world. The information takes the form of peer-reviewed articles, R&D notes, topical review papers, tutorial papers, book reviews, meeting announcements, and news. Coverage includes fundamental and practical aspects of adsorption: mathematics, thermodynamics, chemistry, and physics, as well as processes, applications, models engineering, and equipment design. Among the topics are Adsorbents: new materials, new synthesis techniques, characterization of structure and properties, and applications; Equilibria: novel theories or semi-empirical models, experimental data, and new measurement methods; Kinetics: new models, experimental data, and measurement methods. Processes: chemical, biochemical, environmental, and other applications, purification or bulk separation, fixed bed or moving bed systems, simulations, experiments, and design procedures.