title: Valorisation of forestry waste by pyrolysis in an auger reactor.
abstract: Pyrolysis of forestry waste has been carried out in an auger reactor to study the influence of operational variables on the reactor performance and the properties of the related products. Pine woodchips were used for the first time as raw material and fed continuously into the reactor. Ten experiments were carried out under inert atmosphere at: (i) different reaction temperature (1073, 973, 873, 823 and 773 K); (ii) different solid residence time (5, 3, 2 and 1.5 min); and (iii) different biomass flow rate (3.9, 4.8 and 6.9 kg/h). Results show that the greatest yields for liquid production (59%) and optimum product characterisation were obtained at the lowest temperature studied (773 K) and applying solid residence times longer than 2 min. Regarding bio-oil properties, GC/MS qualitative identification show that the most abundant compounds are volatile polar compounds, phenols and benzenediols; and very few differences can be observed among the samples regardless of the pyrolysis operating conditions. On the whole, experimental results demonstrate that complete reaction of forest woodchips can be achieved in an auger reactor in most of the experimental conditions tested. Moreover, this study presents the initial steps for the future scaling up of the auger reactor with the aim of converting it into a mobile plant which will be able to remotely process biomass such as energy crops, forestry and agricultural wastes to obtain bio-oil that, in turn, can be used as energy vector to avoid high transport costs.
authors.affiliation: Institute of Environmental Science and Technology (ICTA), Universitat Autònoma de Barcelona, Edifici Cn - Campus de la UAB, 08193 Cerdanyola del Vallès, Barcelona, Spain. neus.puy@uab.cat
authors.forename: Neus
authors.initials: N
authors.lastname: Puy
authors.forename: Ramón
authors.initials: R
authors.lastname: Murillo
authors.forename: María V
authors.initials: MV
authors.lastname: Navarro
authors.forename: José M
authors.initials: JM
authors.lastname: López
authors.forename: Joan
authors.initials: J
authors.lastname: Rieradevall
authors.forename: G
authors.initials: G
authors.lastname: Fowler
authors.forename: Ignacio
authors.initials: I
authors.lastname: Aranguren
authors.forename: Tomás
authors.initials: T
authors.lastname: García
authors.forename: Jordi
authors.initials: J
authors.lastname: Bartrolí
authors.forename: Ana M
authors.initials: AM
authors.lastname: Mastral
mesh_terms: D001555:Benzene Derivatives / Q000032:analysis; D016468:Forestry; D008401:Gas Chromatography-Mass Spectrometry; D017745:Incineration; D010636:Phenols / Q000032:analysis; D012037:Refuse Disposal / Q000295:instrumentation / Q000379:methods*; D013696:Temperature; D013818:Thermogravimetry; D013997:Time Factors; D014866:Waste Products / Q000032:analysis*
chemical_list: D001555:Benzene Derivatives; D010636:Phenols; D014866:Waste Products