Biomass Pyrolysis Oil Feedstocks for Phenolic Adhesives

Helena Chum, James Diebold, John Scahill, David Johnson, Stuart Black, Herbert Schroeder, Roland E. Kreibich

Research output: Contribution to conferencePaperpeer-review

49 Scopus Citations


Fast pyrolysis of pine sawdust in a small vortex reactor operating at 10 to 20 kg/h and 480 to 520 °C produces high yields of primary pyrolysis oils (over 55% by weight on a dry basis). The vortex reactor transmits very high heat fluxes to the sawdust, causing primarily depolymerization of the constituent polymers into monomers and oligomers. A preliminary scheme separates the raw oils into a carbohydrate-derived aqueous fraction and a phenolic-rich ethyl acetate (EA) soluble fraction. The EA fraction is washed with water and with aqueous sodium bicarbonate to remove acids yielding 20% to 25% of the feed as phenols and neutrals (P/N) in the EA solution. After EA evaporation, a novolak formulation with 50% phenol and 50% of the P/N fraction was successfully prepared. Gel times for the P/N fractions suitably prepared are intermediate between resorcinol and traditional phenol-formaldehyde resins. Preliminary projected amortized production costs for the P/N fraction are 10(16) cents per pound for a 1,000(250) tons per day plant ($10/dry ton feedstock, 15% interest with 20-year amortization).

Original languageAmerican English
Number of pages17
StatePublished - 1989
EventAdhesives from Renewable Resources - New Orleans, LA, USA
Duration: 4 Sep 19874 Sep 1987


ConferenceAdhesives from Renewable Resources
CityNew Orleans, LA, USA

Bibliographical note

Work performed by Solar Energy Research Institute, Golden, Colorado and Colorado State University, Fort Collins, Colorado

NREL Publication Number

  • ACNR/CH-234-11363


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