Aqueous-phase reforming of bio-oil aqueous fraction over nickel-based catalysts

Research output: Contribution to journalArticleScientificpeer-review

Researchers

Research units

  • University of the Basque Country
  • VTT Technical Research Centre of Finland

Abstract

Aqueous-phase reforming (APR)is a quite new technology for the production of hydrogen and light hydrocarbons from aqueous-organic mixtures in a single-stage process. This manuscript analyzes the APR of representative model compounds of bio-oil aqueous fraction, including acetic acid, ethanol, 1-hydroxypropan-2-one (acetol)and benzene-1,2-diol (catechol), as well as a mixture of all of them. The APR experiments were conducted at 230 °C and 3.2 MPa over three different Ni-based catalysts, including spinel NiAl 2 O 4 , and supported Ni/CeO 2 -γAl 2 O 3 and Ni/La 2 O 3 -αAl 2 O 3 . The reactivity of the model compounds varied largely in the order: acetol > ethanol > catechol > acetic acid, whereas the H 2 production decreased in the following order: ethanol ≫> acetol > acetic acid > catechol. Based on the product distribution obtained, the reaction pathways in the APR of each model compound have been proposed. In the APR of the mixture, the Ni/La 2 O 3 -αAl 2 O 3 led to the highest H 2 yield but was affected by Ni leaching, whereas spinel NiAl 2 O 4 showed a much higher stability. Therefore, the Ni-spinel catalyst showed a good potential for H 2 production by APR of bio-oil aqueous fraction.

Details

Original languageEnglish
Pages (from-to)13157-13168
Number of pages12
JournalInternational Journal of Hydrogen Energy
Volume44
Issue number26
Publication statusPublished - 21 May 2019
MoE publication typeA1 Journal article-refereed

    Research areas

  • Aqueous-phase reforming, Bio-oil, Hydrogen, Ni-based catalysts

ID: 34747584