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Molecules 2018, 23(7), 1528; https://doi.org/10.3390/molecules23071528

Nickel Sulfides Decorated SiC Foam for the Low Temperature Conversion of H2S into Elemental Sulfur

1
Institute of Chemistry and Processes for Energy, Environment and Health (ICPEES), UMR 7515 CNRS-University of Strasbourg (UdS), 25, rue Becquerel, 67087 Strasbourg CEDEX 02, France
2
Ha-Noi University of Mining and Geology, 18 Pho Vien, Duc Thang, Bac Tu Liem, Ha-Noi, Vietnam
3
The University of Da-Nang, University of Science and Technology, 54, Nguyen Luong Bang, Da-Nang, Vietnam
4
Dalian National Laboratory for Clean Energy (DNL), Dalian Institute of Chemical Physics, Chinese Academy of Science, 457 Zhongshan Road, Dalian 116023, China
5
Institute of Chemistry of OrganoMetallic Compounds, ICCOM-CNR Via Madonna del Piano, Sesto F.no, 10-50019 Florence, Italy
6
Kazan Federal University, 420008 Kazan, Russia
*
Authors to whom correspondence should be addressed.
Academic Editors: Lucia D’Accolti, Angelo Nacci and Caterina Fusco
Received: 1 June 2018 / Revised: 20 June 2018 / Accepted: 23 June 2018 / Published: 25 June 2018
(This article belongs to the Special Issue Chemical Transformation of Renewable Material for Green Chemistry)
Full-Text   |   PDF [3647 KB, uploaded 26 June 2018]   |  

Abstract

The selective oxidation of H2S to elemental sulfur was carried out on a NiS2/SiCfoam catalyst under reaction temperatures between 40 and 80 °C using highly H2S enriched effluents (from 0.5 to 1 vol.%). The amphiphilic properties of SiC foam provide an ideal support for the anchoring and growth of a NiS2 active phase. The NiS2/SiC composite was employed for the desulfurization of highly H2S-rich effluents under discontinuous mode with almost complete H2S conversion (nearly 100% for 0.5 and 1 vol.% of H2S) and sulfur selectivity (from 99.6 to 96.0% at 40 and 80 °C, respectively), together with an unprecedented sulfur-storage capacity. Solid sulfur was produced in large aggregates at the outer catalyst surface and relatively high H2S conversion was maintained until sulfur deposits reached 140 wt.% of the starting catalyst weight. Notably, the spent NiS2/SiCfoam catalyst fully recovered its pristine performance (H2S conversion, selectivity and sulfur-storage capacity) upon regeneration at 320 °C under He, and thus, it is destined to become a benchmark desulfurization system for operating in discontinuous mode. View Full-Text
Keywords: silicon carbide; H2S oxidation; low-temperature; catalysis; nickel sulfide silicon carbide; H2S oxidation; low-temperature; catalysis; nickel sulfide
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Duong-Viet, C.; Nguyen-Dinh, L.; Liu, Y.; Tuci, G.; Giambastiani, G.; Pham-Huu, C. Nickel Sulfides Decorated SiC Foam for the Low Temperature Conversion of H2S into Elemental Sulfur. Molecules 2018, 23, 1528.

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