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Energy Yield of Black Locust Biomass Fuel

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Detailed analysis of 2- to 10-year-old black locust (Robinia pseudoacacia L.) biomass components provided an accurate energy content and energy yield determination as well as an index defining a relative ceiling on the delivered cost for black locust biomass in comparison with other fuels such as coal and forest residues. Total energy content of individual biomass components ranged from 20.97 x 106 J kg-1 for leaf tissue to 19.23 x 106 J kg-1 for current years' growth. Annual total energy yields ranged from 33.75 to 76.79 x 109 J ha-1 yr-1 for 3- and 9-year-old stands, respectively. Nine-year-old stands also exhibited the highest annual net whole-tree and woody biomass (whole-tree less foliage) energy yields of 32.71 and 30.73 x 109 J ha-1 yr-1. The net annual energy yields were consistently greater for whole-tree biomass compared with woody biomass due to the foliage included in the whole-tree biomass. The relative cost indices maintained a high degree of variability between comparison fuels. Bituminous coal and forest residues were lowest with an overall mean cost index for woody biomass of $13.28 mt-1 and $13.72 mt-1, respectively. Woody biomass maintained a greater relative index than whole-tree biomass over all age classes due to its inherently higher conversion efficiency. Forest Sci. 32:1049-1057.
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Document Type: Journal Article

Affiliations: Associate Professor, Department of Forestry, University of Kentucky, Lexington, KY 40546-0073

Publication date: 1986-12-01

More about this publication?
  • Forest Science is a peer-reviewed journal publishing fundamental and applied research that explores all aspects of natural and social sciences as they apply to the function and management of the forested ecosystems of the world. Topics include silviculture, forest management, biometrics, economics, entomology & pathology, fire & fuels management, forest ecology, genetics & tree improvement, geospatial technologies, harvesting & utilization, landscape ecology, operations research, forest policy, physiology, recreation, social sciences, soils & hydrology, and wildlife management.
    Forest Science is published bimonthly in February, April, June, August, October, and December.

    2016 Impact Factor: 1.782 (Rank 17/64 in forestry)

    Average time from submission to first decision: 62.5 days*
    June 1, 2016 to Feb. 28, 2017

    Also published by SAF:
    Journal of Forestry
    Other SAF Publications
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