Production of renewable phenolic resins by thermochemical conversion of biomass: a review

This review covers the production and utilisation of liquids from the thermal processing of biomass and related materials to substitute for synthetic phenol and formaldehyde in phenol formaldehyde resins. These resins are primarily employed in the manufacture of wood panels such as plywood, MDF, particle-board and OSB. The most important thermal conversion methods for this purpose are fast pyrolysis and vacuum pyrolysis, pressure liquefaction and phenolysis. Many feedstocks have been tested for their suitability as sources of phenolics including hard and softwoods, bark and residual lignins. Resins have been prepared utilising either the whole liquid product, or a phenolics enriched fraction obtained after fractional condensation or further processing, such as solvent extraction. None of the phenolics production and fractionation techniques covered in this review are believed to allow substitution of 100% of the phenol content of the resin without impacting its effectiveness compared to commercial formulations based on petroleum derived phenol. This survey shows that considerable progress has been made towards reaching the goal of a price competitive renewable resin, but that further research is required to meet the twin challenges of low renewable resin cost and satisfactory quality requirements. Particular areas of concern are wood panel press times, variability of renewable resin properties, odour, lack of reactive sites compared to phenol and potential for increased emissions of volatile organic compounds.

[1]  Dietrich Meier,et al.  Characterization of the water-insoluble fraction from pyrolysis oil (pyrolytic lignin). Part I. PY–GC/MS, FTIR, and functional groups , 2001 .

[2]  C. Roy,et al.  Softwood Bark Pyrolysis Oil-PF Resols. Part 2. Thermal Analysis by DSC and TG , 2002 .

[3]  C. Hse,et al.  Liquefaction of the Used Creosote-Treated Wood in the Presence of Phenol and Its Application to Phenolic Resin , 2000 .

[4]  A. Chaala,et al.  Colloidal Properties of Bio-oils Obtained by Vacuum Pyrolysis of Softwood Bark. Characterization of Water-Soluble and Water-Insoluble Fractions , 2004 .

[5]  Seung‐Hwan Lee.  Phenolic resol resin from phenolated corn bran and its characteristics , 2003 .

[6]  A. Corma,et al.  Synthesis of transportation fuels from biomass: chemistry, catalysts, and engineering. , 2006, Chemical reviews.

[7]  M. Alma,et al.  Cocondensation of NaOH-catalyzed liquefied wood wastes, phenol, and formaldehyde for the production of resol-type adhesives , 2001 .

[8]  C. Roy,et al.  Performance of pyrolysis oil-based wood adhesives in OSB , 2002 .

[9]  F. Rodríguez,et al.  Modification of ammonium lignosulfonate by phenolation for use in phenolic resins. , 2005, Bioresource technology.

[10]  C. Roy,et al.  Production of monomeric phenols by thermochemical conversion of biomass: a review. , 2001, Bioresource technology.

[11]  C. Roy,et al.  Softwood Bark Pyrolysis Oil-PF Resols. Part 1. Resin Synthesis and OSB Mechanical Properties , 2002 .

[12]  D. Meier,et al.  Characterization of the water-insoluble fraction from fast pyrolysis liquids (pyrolytic lignin) , 2001 .

[13]  D. Maldas,et al.  Liquefaction of biomass in the presence of phenol and H2O using alkalies and salts as the catalyst , 1997 .

[14]  Anja Oasmaa,et al.  Fast Pyrolysis of Forestry Residue. 1. Effect of Extractives on Phase Separation of Pyrolysis Liquids , 2003 .

[15]  Seung‐Hwan Lee,et al.  Acid‐catalyzed liquefaction of waste paper in the presence of phenol and its application to Novolak‐type phenolic resin , 2002 .

[16]  Anthony V. Bridgwater,et al.  Research in thermochemical biomass conversion. , 1988 .

[17]  S. Ashraf,et al.  Development and characterization of a wood adhesive using bagasse lignin , 2004 .

[18]  N. Özmen,et al.  Use of organosolv lignin in phenol–formaldehyde resins for particleboard production: I. Organosolv lignin modified resins , 2002 .

[19]  A. Bridgwater,et al.  Overview of Applications of Biomass Fast Pyrolysis Oil , 2004 .

[20]  David K. Johnson,et al.  Use of Biomass Pyrolysis Oils for Preparation of Modified Phenol Formaldehyde Resins , 1997 .

[21]  J. P. Diebold,et al.  A review of the chemical and physical mechanisms of the storage stability of fast pyrolysis bio-oils , 1999 .

[22]  Dietrich Meier,et al.  Norms and standards for fast pyrolysis liquids: 1. Round robin test , 2005 .

[23]  N. Özmen,et al.  Use of organosolv lignin in phenol-formaldehyde resins for particleboard production. II. Particleboard production and properties , 2002 .

[24]  Anthony V. Bridgwater,et al.  Developments in thermochemical biomass conversion , 1997 .

[25]  R. Alén,et al.  Formation of the main degradation compound groups from wood and its components during pyrolysis , 1996 .

[26]  K. Motohashi,et al.  Adhesives from Waste Paper by Means of Phenolation , 1996 .

[27]  D. Meier,et al.  State of the art of applied fast pyrolysis of lignocellulosic materials - a review , 1999 .

[28]  I. Vasalos,et al.  Biomass Pyrolysis for Maximizing Phenolic Liquids , 1988 .

[29]  Asri Gani,et al.  Effect of cellulose and lignin content on pyrolysis and combustion characteristics for several types of biomass. , 2007 .

[30]  M.J.A. van den Oever,et al.  Process for production of high density/high performance binderless boards from whole coconut husk: Part 1: Lignin as intrinsic thermosetting binder resin , 2004 .

[31]  A. Bridgwater,et al.  Fast pyrolysis processes for biomass , 2000 .

[32]  David K. Johnson,et al.  Biomass pyrolysis oil feedstocks for phenolic adhesives. , 1989 .

[33]  D. Mohan,et al.  Pyrolysis of Wood/Biomass for Bio-oil: A Critical Review , 2006 .

[34]  S. H. Lee,et al.  Rapid wood liquefaction by supercritical phenol , 2003, Wood Science and Technology.

[35]  C. Roy,et al.  Phenolic compounds from vacuum pyrolysis of wood wastes , 1997 .

[36]  C. Roy,et al.  Softwood Bark Pyrolysis Oil-PF Resols. Part 3. Use of Propylene Carbonate as Resin Cure Accelerator , 2002 .