Hybrid LCA of a design for disassembly technology: Active disassembling fasteners of hydrogen storage alloys for home appliances

Shinichiro Nakamura, Eiji Yamasue

    Research output: Contribution to journalArticle

    9 Citations (Scopus)

    Abstract

    In the current recycling system of end-of-life (EoL) appliances, which is based on shredding, alloying elements tend to end up in the scrap of base metals. The uncontrolled mixing of alloying elements contaminates secondary metals and calls for dilution with primary metals. Active disassembling fastener (ADF) is a design for disassembly (DfD) technology that is expected to solve this problem by significantly reducing the extent of mixing. This paper deals with a life cycle assessment (LCA) based on the waste input-output (WIO) model of an ADF developed using hydrogen storage alloys. Special attention is paid to the issue of dilution of mixed iron scrap using pig iron in an electric arc furnace (EAF). The results for Japanese electrical and electronic appliances indicate superiority of the recycling system based on the ADF over the current system in terms of reduced emissions of CO2. The superiority of ADF was found to increase with an increase in the requirement for dilution of scrap.

    Original languageEnglish
    Pages (from-to)4402-4408
    Number of pages7
    JournalEnvironmental Science and Technology
    Volume44
    Issue number12
    DOIs
    Publication statusPublished - 2010 Jun 15

    Fingerprint

    Hydrogen storage alloys
    Domestic appliances
    Fasteners
    Life cycle
    dilution
    life cycle
    hydrogen
    Dilution
    Metals
    Alloying elements
    recycling
    Recycling
    Iron scrap
    metal
    base metal
    Pig iron
    pig
    Electric arcs
    iron
    Furnaces

    ASJC Scopus subject areas

    • Chemistry(all)
    • Environmental Chemistry

    Cite this

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    abstract = "In the current recycling system of end-of-life (EoL) appliances, which is based on shredding, alloying elements tend to end up in the scrap of base metals. The uncontrolled mixing of alloying elements contaminates secondary metals and calls for dilution with primary metals. Active disassembling fastener (ADF) is a design for disassembly (DfD) technology that is expected to solve this problem by significantly reducing the extent of mixing. This paper deals with a life cycle assessment (LCA) based on the waste input-output (WIO) model of an ADF developed using hydrogen storage alloys. Special attention is paid to the issue of dilution of mixed iron scrap using pig iron in an electric arc furnace (EAF). The results for Japanese electrical and electronic appliances indicate superiority of the recycling system based on the ADF over the current system in terms of reduced emissions of CO2. The superiority of ADF was found to increase with an increase in the requirement for dilution of scrap.",
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