Preprint Communication Version 1 This version is not peer-reviewed

Catalytic Hot Gas Filtration for Tailoring Vapor-Phase Chemistry of Fast Pyrolysis Bio-Oils

Version 1 : Received: 14 November 2018 / Approved: 16 November 2018 / Online: 16 November 2018 (07:10:50 CET)

A peer-reviewed article of this Preprint also exists.

Lu, M.; Lepore, A.W.; Choi, J.-S.; Li, Z.; Wu, Z.; Polo-Garzon, F.; Hu, M.Z. Acetic Acid/Propionic Acid Conversion on Metal Doped Molybdenum Carbide Catalyst Beads for Catalytic Hot Gas Filtration. Catalysts 2018, 8, 643. Lu, M.; Lepore, A.W.; Choi, J.-S.; Li, Z.; Wu, Z.; Polo-Garzon, F.; Hu, M.Z. Acetic Acid/Propionic Acid Conversion on Metal Doped Molybdenum Carbide Catalyst Beads for Catalytic Hot Gas Filtration. Catalysts 2018, 8, 643.

Journal reference: Catalysts 2018, 8, 643
DOI: 10.3390/catal8120643

Abstract

Carboxylic acids such as acetic acid and propionic acid have been investigated as representative components for fast pyrolysis (FP) bio-oil upgrading. Selective catalytic conversion of carboxylic acids can enhance bio-refinery processing economics through catalyst preservation and process intensification. Various metal-doped molybdenum carbide bead catalysts have been synthesized and developed in this work.  Our aim is to enable selective conversion of carboxylic acids. In the case of acetic acid conversion, calcium doped Mo2C beads offer the highest yield of acetone ~96% at 450 °C among undoped and Ca or Ni doped catalysts. By comparing hot gas filter with and without Ca-Mo2C catalyst tested with real FP vapors, the former showed a 36.7% reduction of acetic acid, a 37.5% reduction of small ketones in aqueous phase, and a ~50% reduction of methoxies (methoxy phenols and methoxy aromatics) in organic phase. The conversion resulted in the formation of more long chain chemicals in the organic phase, which are more amendable for downstream upgrading.

Subject Areas

bio-oil; biomass conversion; carbide catalyst; ketonization; doped carbides

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