Analysis of medium-BTU gasification condensates, June 1985-June 1986
This report provides the final results of chemical and physical analysis of condensates from biomass gasification systems which are part of the US Department of Energy Biomass Thermochemical Conversion Program. The work described in detail in this report involves extensive analysis of condensates from four medium-BTU gasifiers. The analyses include elemental analysis, ash, moisture, heating value, density, specific chemical analysis, ash, moisture, heating value, density, specific chemical analysis (gas chromatography/mass spectrometry, infrared spectrophotometry, Carbon-13 nuclear magnetic resonance spectrometry) and Ames Assay. This work was an extension of a broader study earlier completed of the condensates of all the gasifers and pyrolyzers in the Biomass Thermochemical Conversion Program. The analytical data demonstrates the wide range of chemical composition of the organics recoverd in the condensates and suggests a direct relationship between operating temperature and chemical composition of the condensates. A continuous pathway of thermal degradation of the tar components as a function of temperature is proposed. Variations in the chemical composition of the organic in the tars are reflected in the physical properties of tars and phase stability in relation to water in the condensate. The biological activity appears to be limited to the tars produced at high temperatures as a result of formation of polycyclic aromatic hydrocarbons in high concentrations. Future studies of the time/temperature relationship to tar composition and the effect of processing atmosphere should be undertaken. Further processing of the condensates either as wastewater treatment or upgrading of the organics to useful products is also recommended. 15 refs., 4 figs., 4 tabs.
- Research Organization:
- Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
- DOE Contract Number:
- AC06-76RL01830
- OSTI ID:
- 6466752
- Report Number(s):
- PNL-5979; ON: DE87011107
- Resource Relation:
- Other Information: Portions of this document are illegible in microfiche products. Original copy available until stock is exhausted
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
09 BIOMASS FUELS
TAR
CALORIFIC VALUE
CHEMICAL COMPOSITION
MUTAGENESIS
ALDEHYDES
ALKYLATED AROMATICS
ASHES
BCL PROCESS
BIOTHERMGAS PROCESS
CONDENSED AROMATICS
FURANS
NUCLEAR MAGNETIC RESONANCE
PHENOLS
POLYCYCLIC AROMATIC HYDROCARBONS
SPECTROSCOPY
AROMATICS
COAL LIQUEFACTION
COMBUSTION PROPERTIES
GASIFICATION
HETEROCYCLIC COMPOUNDS
HYDROCARBONS
HYDROXY COMPOUNDS
LIQUEFACTION
MAGNETIC RESONANCE
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
OTHER ORGANIC COMPOUNDS
RESIDUES
RESONANCE
THERMOCHEMICAL PROCESSES
560300* - Chemicals Metabolism & Toxicology
090122 - Hydrocarbon Fuels- Preparation from Wastes or Biomass- (1976-1989)