Fast pyrolysis oils, provided by four different industrial-scale plants, and conventional pyrolysis oils obtained for several heating temperatures, have been characterized by means of GC/MS. About ninety compounds have been identified and forty compounds have been quantified. Apart from water (16-30%), the main contributors of fast pyrolysis oils are: hydroxyacetaldehyde (3-7%), acetic acid (2-5%), levoglucosan (3-4.5%) and hydroxypropanone (1-4%). A reduction in the heating rate (conventional versus fast pyrolysis) enhances the formation of carboxylic acids and water with a diminution in levoglucosan and hydroxyacetaldehyde. Combustion, studied under thermogravimetric conditions, is a two-stage process. The evaporation of the liquid fuel, with homogeneous combustion of released vapors, is followed by the heterogeneous oxidation of secondary char.
CHEMICAL CHARACTERIZATION OF LIQUID PRODUCTS OF BIOMASS PYROLYSIS AND GASIFICATION
Carmen Branca;
2004
Abstract
Fast pyrolysis oils, provided by four different industrial-scale plants, and conventional pyrolysis oils obtained for several heating temperatures, have been characterized by means of GC/MS. About ninety compounds have been identified and forty compounds have been quantified. Apart from water (16-30%), the main contributors of fast pyrolysis oils are: hydroxyacetaldehyde (3-7%), acetic acid (2-5%), levoglucosan (3-4.5%) and hydroxypropanone (1-4%). A reduction in the heating rate (conventional versus fast pyrolysis) enhances the formation of carboxylic acids and water with a diminution in levoglucosan and hydroxyacetaldehyde. Combustion, studied under thermogravimetric conditions, is a two-stage process. The evaporation of the liquid fuel, with homogeneous combustion of released vapors, is followed by the heterogeneous oxidation of secondary char.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
