2026-04-14T05:58:08Zhttps://recercat.cat/oai/request

oai:recercat.cat:10256/278422025-12-05T14:57:33Zcom_2072_452955com_2072_2054col_2072_453073

00925njm 22002777a 4500 dc Maxim, Florentina author Stoian, Giuseppe Stefan author Toma, Elena Ecaterina author Borca, Camelia Nicoleta author Müller Gubler, Elisabeth Agnes author Atkinson, Irina author Torrent Fàbrega, Laura author Ludwig, Christian author Testino, Andrea author 2025-04-24 Sulfur (S) capturing materials working at supercritical water (SCW) conditions need to be designed and developed to overcome issues related with catalyst poisoning during the hydrothermal gasification of wet biomass, an efficient and sustainable technology for alternative fuels production. Sorbent materials of zinc oxide (ZnO) deposited on porous carbon (C) support were prepared by an innovative continuous flow SCW impregnation method. Their S-adsorption performance was tested under the same supercritical conditions in the presence of sodium hydrosulfide (NaHS), as model inorganic sulfur compound. During sulfidation experiments, ZnS replaced ZnO indicating an efficient chemisorption of S with the formation of the sulfide particles by a pseudomorphic replacement mechanism. The S adsorption capacity of the ZnO/C composites reaches 1.55 molS/molZn at relatively low temperature, which is much higher than those of other reported S capturing materials employed in SCW processes. The results reported here confirm that S sorbents can be both generated and used under the continuous flow SCW conditions relevant for technological applications towards the production of hydrogen and methane from biomass wastes and residues http://hdl.handle.net/10256/27842 Química verda Green chemistry Biomassa -- Gasificació Biomass gasification Sostenibilitat Sustainability Carbon-supported ZnO materials for sulfur capturing in supercritical water