Photocatalytic hydrogen production in a solar pilot plant using a Au/TiO <inf>2</inf> photo catalyst

Sandra Yazmin Arzate Salgado, Rosa María Ramírez Zamora, Rodolfo Zanella, José Peral, Sixto Malato, Manuel I. Maldonado

Research output: Contribution to journalArticleResearchpeer-review

30 Citations (Scopus)

Abstract

© 2016 Hydrogen Energy Publications LLC The purpose of the present work was to study the efficiency of an Au/TiO 2 photocatalyst for the simultaneous hydrogen production and organic pollutant removal from aqueous solutions, under direct solar irradiation, and at pilot-plant scale. Several sacrificial agents (pollutants) like alcohols, organic acids, and the organic content of municipal and industrial wastewaters at acid pH were tested. Also, the effect of salt concentration and ionic strength was checked. The experiments were performed in a Compound Parabolic Collector (CPC) at the Plataforma Solar de Almería (PSA). The Au/TiO 2 catalyst showed a remarkable activity towards hydrogen production. Indeed, 6500 μmol H 2 ·L −1 were generated after 5 h, with an accumulated radiation energy of 100 kJ·L −1 , and a catalyst concentration of 0.2 g·L −1 . The dissolved organic carbon (DOC) concentration showed a positive influence towards the hydrogen production, while the ionic strength showed a clear negative effect. The highest rate of photocatalytic hydrogen production was attained using formic acid as sacrificial agent.
Original languageEnglish
Pages (from-to)11933-11940
JournalInternational Journal of Hydrogen Energy
Volume41
Issue number28
DOIs
Publication statusPublished - 27 Jul 2016

Keywords

  • Compound parabolic collector (CPC)
  • Solar hydrogen
  • Wastewater as sacrificial agent

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