Synergistic bimetallic Ru–Pt catalysts for the low-temperature aqueous phase reforming of ethanol

Zheng Zhao, Lu Zhang, Qiaohua Tan, Feifei Yang, Jimmy Faria, Daniel Resasco* (Corresponding Author)

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

10 Citations (Scopus)
1 Downloads (Pure)

Abstract

Aqueous phase reforming (APR) of ethanol has been studied over a series of Ru and Pt catalysts supported on carbon and titania, with different metal loadings and particle sizes. This study proposed that, on both metals, ethanol is first dehydrogenated to acetaldehyde, which subsequently undergoes CC cleavage followed by different paths, depending on the catalyst used. For instance, although monometallic Pt has high selectivity toward H2 via dehydrogenation, it has a low efficiency for CC cleavage, lowering the overall H2 yield. Large Ru particles produce CH4 through methanation, which is undesirable because it consumes H2. Small Ru particles have lower activity but higher selectivity toward H2 rather than CH4. On these small particles, CO blocks low-coordination sites, inhibiting methanation. The combination of the two metals in bimetallic Ru–Pt catalysts results in improved performance, benefiting from the desirable properties of each Ru and Pt, without the negative effects of either.

Original languageEnglish
Pages (from-to)151-160
Number of pages10
JournalAIChE journal
Volume65
Issue number1
DOIs
Publication statusPublished - 1 Jan 2019

Keywords

  • aqueous phase reforming
  • C-C cleavage
  • ethanol
  • particle size effect

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