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<p>Hydrogen sulfide (H<sub>2</sub>S), recognized for its highly irritating odor and toxic characteristics, can cause significant damage to natural gas and petroleum transport pipelines even at low concentrations. In this study, an iron-rich Limonite mineral filler was incorporated into polyethersulfone (PES) fibers through a wet-spinning process utilizing the phase-inversion method to prepare the mesoporous limonite composite fiber (LC) applied for the adsorption of H<sub>2</sub>S. Increasing the addition of limonite from 20 to 60 wt% in the composite fiber enhanced surface area and reduced the BJH pore volume, with values ranging from 14.2 m<sup>2</sup>.g<sup>-1</sup> and 0.022 cm<sup>3</sup>.g<sup>-1</sup> for LC20 to 30 m<sup>2</sup>.g<sup>-1</sup> and 0.050 cm<sup>3</sup>.g<sup>-1</sup> for LC60. Consequently, the maximum H<sub>2</sub>S adsorption capacity in batch model, which was followed the Langmuir model, reached 79.8&#xa0;mmol.g<sup>-1</sup>. In the fixed-bed column system, the lower packing volume of the LC60 composite fiber increased the diffusion rate leading to achieve higher values of saturation concentration N<sub>0</sub>. Spectroscopic studies confirmed that H<sub>2</sub>S adsorption occurred primarily on Brønsted and Lewis acid sites presenting on the surface. This study suggested that the natural-limonite based composite fiber was a promsing adsorbent for the treatment of H<sub>2</sub>S.</p>

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Fe-rich mineral-based composite fiber as mesoporous adsorbent towards hydrogen-sulfide treatment

  • 期刊论文

  • 发表日期：

    2025年6月21日

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  • Khoa Dang Nguyen,
  • Takaomi Kobayashi,
  • Li Yuze,
  • Anh Phuong Le Thi,
  • Ngan Thi Thu Phan,
  • Trang Thi Cam Truong

摘要

Hydrogen sulfide (H2S), recognized for its highly irritating odor and toxic characteristics, can cause significant damage to natural gas and petroleum transport pipelines even at low concentrations. In this study, an iron-rich Limonite mineral filler was incorporated into polyethersulfone (PES) fibers through a wet-spinning process utilizing the phase-inversion method to prepare the mesoporous limonite composite fiber (LC) applied for the adsorption of H2S. Increasing the addition of limonite from 20 to 60 wt% in the composite fiber enhanced surface area and reduced the BJH pore volume, with values ranging from 14.2 m2.g-1 and 0.022 cm3.g-1 for LC20 to 30 m2.g-1 and 0.050 cm3.g-1 for LC60. Consequently, the maximum H2S adsorption capacity in batch model, which was followed the Langmuir model, reached 79.8 mmol.g-1. In the fixed-bed column system, the lower packing volume of the LC60 composite fiber increased the diffusion rate leading to achieve higher values of saturation concentration N0. Spectroscopic studies confirmed that H2S adsorption occurred primarily on Brønsted and Lewis acid sites presenting on the surface. This study suggested that the natural-limonite based composite fiber was a promsing adsorbent for the treatment of H2S.