Jump to main content
Jump to site search

Issue 20, 2016
Previous Article Next Article

Supported molybdenum oxides as effective catalysts for the catalytic fast pyrolysis of lignocellulosic biomass

Author affiliations

Abstract

The catalytic fast pyrolysis (CFP) of pine was investigated over 10 wt% MoO3/TiO2 and MoO3/ZrO2 at 500 °C and H2 pressures ≤0.75 bar. The product distributions were monitored in real time using a molecular beam mass spectrometer (MBMS). Both supported MoO3 catalysts show different levels of deoxygenation based on the cumulative biomass to MoO3 mass ratio exposed to the catalytic bed. For biomass to MoO3 mass ratios <1.5, predominantly olefinic and aromatic hydrocarbons are produced with no detectable oxygen-containing species. For ratios ≥1.5, partially deoxygenated species comprised of furans and phenols are observed, with a concomitant decrease of olefinic and aromatic hydrocarbons. For ratios ≥5, primary pyrolysis vapours break through the bed, indicating the onset of catalyst deactivation. Product quantification with a tandem micropyrolyzer–GCMS setup shows that fresh supported MoO3 catalysts convert ca. 27 mol% of the original carbon into hydrocarbons comprised predominantly of aromatics (7 C%), olefins (18 C%) and paraffins (2 C%), comparable to the total hydrocarbon yield obtained with HZSM-5 operated under similar reaction conditions. Post-reaction XPS analysis on supported MoO3/ZrO2 and MoO3/TiO2 catalysts reveal that ca. 50% of Mo surface species exist in their partially reduced forms (i.e., Mo5+ and Mo3+), and that catalyst deactivation is likely associated to coking.

Graphical abstract: Supported molybdenum oxides as effective catalysts for the catalytic fast pyrolysis of lignocellulosic biomass

Back to tab navigation

Supplementary files

Publication details

The article was received on 27 Apr 2016, accepted on 12 Jul 2016 and first published on 12 Jul 2016


Article type: Paper
DOI: 10.1039/C6GC01189F
Citation: Green Chem., 2016,18, 5548-5557
  • Open access: Creative Commons BY license
  •   Request permissions

    Supported molybdenum oxides as effective catalysts for the catalytic fast pyrolysis of lignocellulosic biomass

    K. Murugappan, C. Mukarakate, S. Budhi, M. Shetty, M. R. Nimlos and Y. Román-Leshkov, Green Chem., 2016, 18, 5548
    DOI: 10.1039/C6GC01189F

    This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. Material from this article can be used in other publications provided that the correct acknowledgement is given with the reproduced material.

    Reproduced material should be attributed as follows:

    • For reproduction of material from NJC:
      [Original citation] - Published by The Royal Society of Chemistry (RSC) on behalf of the Centre National de la Recherche Scientifique (CNRS) and the RSC.
    • For reproduction of material from PCCP:
      [Original citation] - Published by the PCCP Owner Societies.
    • For reproduction of material from PPS:
      [Original citation] - Published by The Royal Society of Chemistry (RSC) on behalf of the European Society for Photobiology, the European Photochemistry Association, and RSC.
    • For reproduction of material from all other RSC journals:
      [Original citation] - Published by The Royal Society of Chemistry.

    Information about reproducing material from RSC articles with different licences is available on our Permission Requests page.

Search articles by author

Spotlight

Advertisements