Xiaoyu Zhou1, Xiaoning Pei1, Rui Wang This email address is being protected from spambots. You need JavaScript enabled to view it.1, Tiansheng Zhao2

1 School of Environmental Science and Engineering, Shandong University, Qingdao 266237, China
2 State Key Laboratory of High-Efficiency Utilization of Coal and Green Chemical Engineering, Yinchuan 750021, China


Received: April 12, 2021
Revised: July 7, 2021
Accepted: July 10, 2021

 Copyright The Author(s). This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are cited.


Download Citation: ||https://doi.org/10.4209/aaqr.210065  

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Cite this article:

Zhou, X., Pei, X., Wang, R., Zhao, T. (2021). Catalytic Conversion for Hydrogen Sulfide. Aerosol Air Qual. Res. https://doi.org/10.4209/aaqr.210065


HIGHLIGHTS

  • Transition metal mono-substituted heteropoly compounds were prepared to remove H2.
  • H7PMo11CoO39 had the remarkable desulfurization and regeneration capabilities.
  • Optimal conditions for desulfurization were obtained.
  • The desulfurization products were confirmed to be S and SO42–.
 

ABSTRACT


In this study, a series of transition metal mono-substituted heteropoly compounds H7PMo11MO39 (M=Co2+, Mn2+, Ni2+ and Zn2+) (HPMo11M) and single-absent heteropoly compounds H3PMo11O39 (HPMo11) were prepared for highly effective removal of hydrogen sulfide (H2S) from gas stream. The heteropoly compounds were characterized Fourier transform infrared spectroscopy (FT-IR), elemental analysis and scanning electron microscopy (SEM). The results confirmed that the transition metal ions successfully replaced the Mo atom. H7PMo11CoO39 showed that the outstanding desulfurization capacity and the H2S removal efficiency can reach more than 90% for 3 h. Besides, after regeneration, the desulfurization capacity of H7PMo11CoO39 towards H2S only a drop of 5.11% of the initial desulfurization capacity. Optimization experiments demonstrated that H7PMo11CoO39 had the ideal desulfurization performance under the condition of low H2S concentration or high dosage of H7PMo11CoO39. An appropriate temperature of 25°C is necessary for high removal efficiency. The optimum pH value for desulfurization is 5. The kinetic data can be well described by pseudo-first-order kinetic model. The desulfurization products were proved to be S and SO42– based on X-ray photoelectron spectroscopy (XPS) characterization results.


Keywords: Transition metal ions, Heteropoly compound, H2S, Desulfurization




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