Shin Hyo-Won, Hwang June-Hyeon, Kim Eun-A, Hong Tae-Whan
Department of Materials Science and Engineering, College of Engineering, Korea National University of Transportation, Chungju 27469, Korea.
Materials (Basel). 2021 May 26;14(11):2848. doi: 10.3390/ma14112848.
Magnesium-based alloys are attractive as hydrogen storage materials due to their lightweight and high absorption, but their high operating temperatures and very slow kinetics are obstacles to practical applications. Therefore, the effect of CaO has improved the hydrogenation kinetics and slowed down the degradation. The MgNiH-CaO composites were prepared by hydrogen-induced mechanical alloying (HIMA). Hydrogenation kinetics was performed by using an Automatic PCT Measuring System and evaluated in the temperature range of 423, 523, and 623 K. As a result of calculating the hydrogen absorption amounts through the hydrogenation kinetics curve, they were calculated as about 0.52 wt%, 1.21 wt%, and 1.59 wt% (MgNiH-10 wt% CaO). In this study, the material environmental aspects of MgNiH-CaO composites were investigated through life cycle assessment (LCA). LCA was performed analyzing the environmental impact characteristics of the manufacturing process by using Gabi software and the Eco-Indicator 99' and Centrum voor Milieuweten schappen (CML 2001) methodology. As a result, the contents of global warming potential (GWP) and fossil fuels were found to have a higher impact than other impact categories.
镁基合金因其重量轻和吸氢量大而作为储氢材料具有吸引力，但其高工作温度和非常缓慢的动力学是实际应用的障碍。因此，CaO的作用改善了氢化动力学并减缓了降解。通过氢致机械合金化（HIMA）制备了MgNiH-CaO复合材料。使用自动PCT测量系统进行氢化动力学，并在423、523和623 K的温度范围内进行评估。通过氢化动力学曲线计算吸氢量的结果，它们被计算为约0.52 wt%、1.21 wt%和1.59 wt%（MgNiH-10 wt% CaO）。在本研究中，通过生命周期评估（LCA）研究了MgNiH-CaO复合材料的材料环境方面。使用Gabi软件以及生态指标99'和荷兰环境科学中心（CML 2001）方法对制造过程的环境影响特征进行分析来进行LCA。结果发现，全球变暖潜能值（GWP）和化石燃料的含量比其他影响类别具有更高的影响。
