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Título : | Novel ZnO-NiO-graphene-based sorbents for removal of hydrogen sulfide at intermediate temperature |
Autor : | Sanchez-Hervas, Jose Maria Maroño, Marta Ortiz, Isabel Ortiz, Raquel Fernandez, Rodolfo Gomez Mancebo, Maria Belen |
Palabras clave : | Gas cleaning Desulfurization Sorbent ZnO-NiO-rGO composite Graphene Syngas H2S Biorefinery |
Fecha de publicación : | abr-2022 |
Editorial : | Elsevier |
Citación : | J.M. Sánchez-Hervás, M. Maroño, R. Fernández-Martínez, I. Ortiz, R. Ortiz, M.B. Gómez-Mancebo, Novel ZnO-NiO-graphene-based sorbents for removal of hydrogen sulfide at intermediate temperature, Fuel, Volume 314, 2022, 122724, ISSN 0016-2361 |
Citación : | Fuel,;Volume 314, 2022, 122724 |
Resumen : | When syngas is upgraded to bio-refinery products, hydrogen sulfide removal is necessary to prevent corrosion of equipment and avoid poisoning of sulfur sensitive catalysts. Technologies relying on sorbents working in the 300–500 °C temperature range are desirable for better process integration. In this work, a new family of reduced graphene ZnO-NiO sorbents, Zn-Ni-rGO, were synthesized by non-expensive and easily replicable scalable methods and studied for the first time for hydrogen sulfide reactive adsorption. Preparation was based on the Hummers & the improved Tour methods followed by addition of Zn(NO3), Ni(NO3), hydrothermal reduction and annealing. As obtained as well as post-reaction rGO-NiO-ZnO sorbents were characterized by XRF, XRD and N2 adsorption at −196 °C. The performance of the sorbents for fixed bed desulfurization was determined at lab-scale (P = 10 bar, T = 400 °C, GHSV = 3500 h−1) on a gas stream containing 9000 ppmv of H2S/N2. The sorbents showed better hydrogen sulfide removal capacity than the commercial one studied for comparison, what makes them a potential candidate for gas cleaning in the syngas-related sectors. |
URI : | https://doi.org/10.1016/j.fuel.2021.122724. http://documenta.ciemat.es/handle/123456789/4064 |
ISSN : | 0016-2361 |
Aparece en las colecciones: | Artículos de Energía
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