Reaction conditions effect and pathways in the oxidative steam reforming of raw bio-oil on a Rh/CeO2–ZrO2 catalyst in a fluidized bed reactor

A. Arandia, A. Remiro (Corresponding Author), L. Oar-Arteta, J. Bilbao, A.G. Gayubo

Research output: Contribution to journalArticleScientificpeer-review

26 Citations (Scopus)

Abstract

A reaction scheme has been proposed for the oxidative steam reforming (OSR) of raw bio-oil on a Rh/CeO 2-ZrO 2 catalyst, based on the study of the effect reaction conditions (temperature, space time, oxygen/carbon ratio and steam/carbon ratio) have on product yields (H 2, CO, CO 2, CH 4, hydrocarbons). The runs were performed in a two-step system, with separation of pyrolytic lignin (first step) followed by catalytic reforming in a fluidized bed reactor (second step), under a wide range of reaction conditions (600–750 °C; space time, 0.15–0.6 g catalysth/g bio-oil; oxygen to carbon molar ratio (O/C), 0–0.67; steam to carbon molar ratio (S/C), 3–9). The catalyst is very active for bio-oil reforming, and produces high H 2 yield (between 0.57 and 0.92), with low CO yield (0.035–0.175) and CH 4 yield (below 0.045) and insignificant light hydrocarbons formation. The proposed reaction scheme considers the catalyzed reactions (reforming, water gas shift (WGS) and combustion) and the thermal routes (decomposition/cracking and combustion). The deactivation of the catalyst affects progressively the reactions in the following order: CH 4 reforming, hydrocarbons reforming, oxygenates reforming, combustion and WGS.

Original languageEnglish
Pages (from-to)29175-29185
JournalInternational Journal of Hydrogen Energy
Volume42
Issue number49
DOIs
Publication statusPublished - 2017
MoE publication typeA1 Journal article-refereed

Keywords

  • Bio-oil
  • Hydrogen
  • Oxidative steam reforming
  • Reaction scheme
  • Rh catalyst

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