Skip to Main Content
Analysis of the fly ash from the processing of wood chips in a pilot-scale downdraft gasifier: Comparison of inorganic constituents determined by PIXE and ICP-AESAuthor(s): Thomas L Eberhardt; Hui Pan
Source: Biomass and Bioenergy 51:163-168
Publication Series: Scientific Journal (JRNL)
Station: Southern Research Station
View PDF (215.08 KB)
DescriptionGasification of biomass ultimately generates at least one solid byproduct in which the inorganic constituents of the biomass are concentrated. Given the potential for utilization, or issues with disposal, facile methods are needed for determining the compositions of the fly ashes from recently-available gasifier-based bioenergy systems. Proton induced x-ray emission spectroscopy (PIXE) and inductively coupled plasma atomic emission spectroscopy (ICP-AES) were used to characterize the fly ash recovered from a pilot-scale (25 kW) modular bioenergy system operated with wood chips as the feedstock. The composition of the fly ash from the downdraft gasifier showed some similarities to compositions reported for boiler wood ashes, apart from one half of the material being unburned carbon. Although ICP-AES showed greater sensitivity for the analysis of the fly ash, especially for small amounts of heavy metal contaminants, PIXE proved to be a powerful analytical tool for screening of elements from sodium to uranium. Such broad spectrum screenings could prevent the inadvertent land application of unsuspected pollutant elements. Fly ashes from biomass gasification appear to be suitable for use as ash-based fertilizers for forest lands; however, combustion to remove unburned carbon may be advisable.
- You may send email to firstname.lastname@example.org to request a hard copy of this publication.
- (Please specify exactly which publication you are requesting and your mailing address.)
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
CitationEberhardt, Thomas L, Pan Hui. 2013. Analysis of the fly ash from the processing of wood chips in a pilot-scale downdraft gasifier: Comparison of inorganic constituents determined by PIXE and ICP-AES. Biomass and Bioenergy 51:163-168.
KeywordsBioenergy, Gasification, Heavy metals, Fertilizer, Waste disposal
- Elemental analyses of chars isolated from a biomass gasifier fly ash
- Characterization of fly ash from the gasification of wood and assessment for its application as a soil amendment
- Chemistry of burning the forest floor during the FROSTFIRE experimental burn, interior Alaska, 1999.
XML: View XML