ZnO/SBA-15 composites for mid-temperature removal of H

M. Mureddu, I. Ferino, E. Rombi, M.G. Cutrufello, P. Deiana, A. Ardu, A. Musinu, G. Piccaluga, C. Cannas

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Abstract

ZnO/SBA-15 composites for mid-temperature H2S removal were prepared by both conventional Incipient Wetness and Two-Solvents impregnation techniques. The composites, differing as to the ZnO loading and the calcination treatment, were characterised by X-ray diffraction, transmission electron microscopy (also in the high resolution mode) and N2physisorption. Characterisation techniques revealed that zinc oxide was highly dispersed into/over the well-ordered mesoporous channels. In all the composites the mesostructure of the support was still retained together with a high surface area, large pore volume and uniform pore size. The sorbent performance for H2S removal from a H2S/He stream was investigated and compared with a commercial ZnO sorbent. The confinement of the active phase in the SBA-15 structure enhances its ability to interact with hydrogen sulphide, which results in improved performance. Temperature-programmed experiments were carried out for selecting appropriate regeneration conditions. The regenerated sorbent showed a sorption capacity even higher than that of the fresh ones. Such behaviour is maintained in repeated sorption/regeneration cycles. © 2012 Elsevier Ltd. All rights reserved.
Original languageEnglish
Pages (from-to)691 - 700
Number of pages10
JournalFuel
Volume102
DOIs
Publication statusPublished - Dec 2012

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All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)
  • Fuel Technology
  • Energy Engineering and Power Technology
  • Organic Chemistry

Cite this

Mureddu, M., Ferino, I., Rombi, E., Cutrufello, M. G., Deiana, P., Ardu, A., ... Cannas, C. (2012). ZnO/SBA-15 composites for mid-temperature removal of H. Fuel, 102, 691 - 700. https://doi.org/10.1016/j.fuel.2012.05.013