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http://dx.doi.org/10.7464/ksct.2021.27.2.107

Material Life Cycle Assessment on Mg2NiHx-5 wt% CaO Hydrogen Storage Composites  

Shin, Hyo-Won (Department of Materials Science & Engineering, Korea National University of Transportation)
Hwang, June-Hyeon (Department of Materials Science & Engineering, Korea National University of Transportation)
Kim, Eun-A (Department of Materials Science & Engineering, Korea National University of Transportation)
Hong, Tae-Whan (Department of Materials Science & Engineering, Korea National University of Transportation)
Publication Information
Clean Technology / v.27, no.2, 2021 , pp. 107-114 More about this Journal
Abstract
Material Life Cycle Assessment (MLCA) was performed to analyze the environmental impact characteristics of the Mg2NiHx-5 wt% CaO hydrogen storage composites' manufacturing process. The MLCA was carried out by Gabi software. It was based on Eco-Indicator 99' (EI99) and CML 2001 methodology. The Mg2NiHx-5 wt% CaO composites were synthesized by Hydrogen Induced Mechanical Alloying (HIMA). The metallurgical, thermochemical characteristics of the composites were analyzed by using X-ray diffraction (XRD), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), specific surface area analysis (Bruner-Emmett-Teller, BET), and thermogravimetric analysis (TGA). As a result of the CML 2001 methodology, the environmental impact was 78% for Global Warming Potential (GWP) and 22% for Eutrophication Potential (ETP). In addition, as a result of applying the EI 99' methodology, the acidification was the highest at 43%, and the ecotoxicity was 31%. Accordingly, the amount of electricity used in the manufacturing process may have an absolute effect on environmental pollution. Also, it is judged that the leading cause of Mg2NiHx-5 wt% CaO is the addition of CaO. Ultimately, it is necessary to research environmental factors by optimizing the process, shortening the manufacturing process time, and exploring eco-friendly alternative materials.
Keywords
MLCA (Material Life Cycle Assessment); Hydrogen storage; Eco-Indicator 99'; CML 2001; HIMA (Hydrogen Induced Mechanical Alloying);
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