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  1. Using life-cycle assessment to evaluate environmental impacts of briquette production from forest residues

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    Author(s): Sevda Alanya-Rosenbaum; Richard Bergman
    Date: 2018
    Source: Gen. Tech. Rep. FPL-GTR-262. Madison, WI: U.S. Department of Agriculture, Forest Service, Forest Products Laboratory. 1-24.
    Publication Series: General Technical Report (GTR)
    Station: Forest Products Laboratory
    DOI: https://doi.org/10.2737/FPL-GTR-262
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    Description

    This report presents a life-cycle impact assessment analysis of near-woods processing of post-harvest forest residues into wood briquettes as an alternative to other fuels such as propane in residential heating systems. The study was part of the Waste to Wisdom project with a broader goal of evaluating the feasibility of using semimobile biomass conversion technologies to overcome the barriers of valorizing woody biomass residues for renewable energy and material production. The cradle-to-grave system boundary included feedstock procurement, hauling, feedstock preparation, production of briquetted biomass from forest residues, briquette transportation (distribution), and heat generation at the residential wood stove (use phase) life-cycle stages. The feedstock preparation stage contributed the most to the global warming (GW) impact of the near-woods wood briquette production supply chain. This was because of the drying process, which contributed 72% of the overall GW impact. Near-woods biomass conversion using wood gasifier as the power source was favorable compared with the other scenarios, which included diesel power and in-town processing of forest residues using grid electricity. The overall decrease in GW impact was 33%, after taking into account the avoided pile and burn emissions. Thus, substituting propane with wood briquettes in heating systems provided greenhouse gas reduction while aiding forest restoration activities.

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    Citation

    Alanya-Rosenbaum, Sevda; Bergman, Richard. 2018. Using life-cycle assessment to evaluate environmental impacts of briquette production from forest residues. Gen. Tech. Rep. FPL-GTR-262. Madison, WI: U.S. Department of Agriculture, Forest Service, Forest Products Laboratory. 1-24.

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    Keywords

    Bioenergy, biomass densification, briquette, post-harvest forest residues, life-cycle assessment

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