Effect of drying on yield and calorific values of extractables from leafy spurge (Euphorbia esula)
The effect of dehydration on yield and calorific values has been investigated for oils, hydrocarbons, and poly-phenols extracted from leaves of Euphorbia esula (leafy spurge). Methods of dehydration employed were with a warm oven (50 degrees C), a hot oven (105 degrees C), at room temperature (25 degrees C), and with freeze drying. Generally, dehydration resulted in a loss of yield for all extractives. Noteworthy exceptions were oil yields from the warm-oven or air-dried biomass which did not differ significantly from fresh tissue. Significant differences in calorific values (range 4643-5192 cal/g) were observed for each category of whole leafy biomass dehydrated as indicated above. Dehydration reduced the calorific value of oils (range 9483-10,095 cal/g) but tended to increase the calorific values of polyphenols (range 4178-6033 cal/g). NMR spectroscopy of the oil fraction suggested that dehydration did not grossly alter the composition of oils, despite differences in yield and calorific values.
- Research Organization:
- Dept of Natural Sciences, Eastern Montana Coll, Billings, MT 59101
- OSTI ID:
- 6646847
- Journal Information:
- Biotechnol. Bioeng.; (United States), Vol. 26:4
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
HYDROCARBONS
CALORIFIC VALUE
LEAVES
DEHYDRATION
OILS
POLYPHENOLS
DRYING
EUPHORBIA
EXPERIMENTAL DATA
SPECTROSCOPY
TEMPERATURE EFFECTS
YIELDS
AROMATICS
COMBUSTION PROPERTIES
DATA
HYDROXY COMPOUNDS
INFORMATION
NUMERICAL DATA
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
PHENOLS
PLANTS
090122* - Hydrocarbon Fuels- Preparation from Wastes or Biomass- (1976-1989)
140504 - Solar Energy Conversion- Biomass Production & Conversion- (-1989)