title: Impact of the lignocellulosic material on fast pyrolysis yields and product quality.
abstract: The paper describes the fast pyrolysis conversion of lignocellulosic materials inside a bubbling fluidized bed. The impact of biopolymers distribution in the biomass feed, namely hemicelluloses, cellulose and lignin, on the yields and properties of pyrolytic bio-oils and chars was investigated. Although it is not possible to deconvoluate chemical phenomena from transfer phenomena using bubbling fluidized bed reactors, the key role of hemicelluloses in biomass feedstocks was illustrated by: (i) its influence on the production of pyrolytic water, (ii) its impact on the production of organics, apparently due to its bonding relationship with the lignin and (iii) its ability to inhibit the development of chars porosity, while the cellulose appeared to be the precursor for the microporous character of the biochars. These results are of interest for the selection of suitable feedstocks aimed at producing bio-oil and char as fuels and soil amendment, respectively.
authors.affiliation: Department of Process Engineering, University of Stellenbosch, Private Bag X1, Matieland 7602, South Africa. Electronic address: carrier@sun.ac.za.
authors.forename: Marion
authors.initials: M
authors.lastname: Carrier
authors.forename: Jan-Erns
authors.initials: JE
authors.lastname: Joubert
authors.forename: Stephen
authors.initials: S
authors.lastname: Danje
authors.forename: Thomas
authors.initials: T
authors.lastname: Hugo
authors.forename: Johann
authors.initials: J
authors.lastname: Görgens
authors.forename: Johannes Hansie
authors.initials: JH
authors.lastname: Knoetze
mesh_terms: D056804:Biofuels; D001709:Biotechnology / Q000379:methods*; D002482:Cellulose / Q000737:chemistry; D002606:Charcoal / Q000737:chemistry; D005052:Eucalyptus / Q000737:chemistry; D006358:Hot Temperature; D008031:Lignin / Q000494:pharmacology*; D009821:Oils / Q000737:chemistry; D016062:Porosity; D031786:Saccharum / Q000737:chemistry; D013818:Thermogravimetry; D014197:Trees / Q000737:chemistry
chemical_list: D056804:Biofuels; D009821:Oils; C540010:biochar; C036909:lignocellulose; D002606:Charcoal; D002482:Cellulose; D008031:Lignin; C027433:bagasse
keywords: Bio-oil; Biochar; Fast pyrolysis; Lignocellulose; Thermodynamic regime