Hydrogenation of biomass-derived levulinic acid to Γ-valerolactone catalyzed by mesoporous supported dendrimer-derived Ru and Pt catalysts: An alternative method for the production of renewable biofuels

Mulisa Nemanashi, Ji Hyang Noh, Reinout Meijboom

Research output: Contribution to journalArticlepeer-review

61 Citations (Scopus)

Abstract

Generation 4 PAMAM-OH dendrimers were employed as templating agent for the synthesis of dendrimer-encapsulated Ru and Pt nanoparticles (Ru- or Pt-DENs). These DEN catalysts were then immobilized onto preformed mesoporous support materials (TiO2 and SiO2) using wet-impregnation method to produce heterogeneous catalysts. Ru- and Pt-DENs were characterized prior to immobilization using UV–vis (UV-vis) spectroscopy and high-resolution transmission microscopy (HRTEM). The average particle sizes for Ru- and Pt-DENs were determined to be 1.4 ± 0.2 and 1.7 ± 0.3 nm, respectively. Supported solid catalysts were characterized using various techniques such N2 adsorption-desorption physisorption, powder X-ray diffraction (PXRD), Fourier transform infrared (FTIR) and HRTEM. Inductive coupled plasma-optical emission spectroscopy (ICP-OES) was used for the determination of metal loading on the support. The catalytic performance of these catalysts was investigated in the selective hydrogenation of levulinic acid (LA) to produce γ-valerolactone (GVL). The highest conversion was observed when unsupported catalysts (Ru-DENs and Pt-DENs) were used for all systems studied. The Ru catalyst displayed excellent activity as compared to Pt catalysts. All catalysts showed selectivity to γ-valerolactone up to 100%.

Original languageEnglish
Pages (from-to)77-89
Number of pages13
JournalApplied Catalysis A: General
Volume550
DOIs
Publication statusPublished - 25 Jan 2018

Keywords

  • Hydrogenation
  • Levulinic acid
  • Mesoporous materials
  • PAMAM dendrimers
  • Silica
  • Titania

ASJC Scopus subject areas

  • Catalysis
  • Process Chemistry and Technology

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