Abstract
The utilization of biomass pyrolysis oils or isolated fractions of these feedstocks requires a fast overall characterization technique. Gas chromatographic techniques typically analyze only the volatile fraction (5%-50%) of underivatized oils. With proper choice of solvent and detector systems, the HPSEC on polystyrene-divinylbenzene copolymer gels of the whole oils can provide valuable information on the apparent molecular weight distributions and changes that occur upon aging or chemical fractionation. Several pyrolysis oils have been analyzed as well as fractions isolated by solvent elution chromatography. In order to understand better the observed low-molecular-weight region, a number of model substances of the main classes of compounds found in pyrolysis oils have been investigated. While hydrogen bonding between the phenolic groups and tetrahydrofuran occurs, solute-solute interactions can be kept very small by operating at very low concentrations of solute; solute-gel interactions do occur when polycyclic aromatic compounds predominate. HPSEC provides very good information on shelf life, reactivity of pyrolysis oils, and comparison of oils as a function of process conditions.
| Original language | American English |
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| Pages | 167-177 |
| Number of pages | 11 |
| State | Published - 1987 |
| Event | Production, Analysis and Upgrading of Oils from Biomass, Volume 32, No. 2 - Denver, Colorado Duration: 5 Apr 1987 → 10 Apr 1987 |
Conference
| Conference | Production, Analysis and Upgrading of Oils from Biomass, Volume 32, No. 2 |
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| City | Denver, Colorado |
| Period | 5/04/87 → 10/04/87 |
NREL Publication Number
- ACNR/CP-234-8588