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首页> 外文会议>International Tropical Renewable Energy Conference >The Role of Nano-Ni Catalyst in MgH_2 Obtained by Reactive Mechanical Milling Method for Solid Hydrogen Storage Application
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The Role of Nano-Ni Catalyst in MgH_2 Obtained by Reactive Mechanical Milling Method for Solid Hydrogen Storage Application

机译：纳米Ni催化剂在用于固体储氢施加的反应机械研磨方法中的MGH_2中的作用

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Magnesium (Mg) is regarded as one of the candidate material for absorbing hydrogen, because theoretically, has the ability to absorb hydrogen in the large quantities (7.6 wt%). However, Mg has shortage, namely its kinetic reaction is very slow, it takes time to absorb hydrogen at least 60 minutes with very high operating temperatures (300-400°C). The aim of this study is to improve the hydrogen desorption temperature of Mg-based hydrogen storage material. In this work, we used nano-nickel (Ni) as catalyst in MgH_2 and obtained by reactive mechanical milling method. The duration of milling was done in 2 hours (soft milling) with the 2 mol% Ni catalyst and milled under hydrogen atmosphere (10 bar). As the results, small amount of 2 mol% Ni in nanometer scale acts as a suitable catalyst for improvement the kinetics of MgH2 which could absorp 5.5 wt% of hydrogen within 10 minutes at 300°C. It is obvious that small amount has much better as catalyst in nanoparticle size and at the same time allowed to reduce the milling process in short time.
机译：镁（Mg）被认为是用于吸收氢的候选材料之一，因为理论上，具有在大量（7.6wt％）中吸收氢的能力。然而，MG缺乏短缺，即其动力学反应非常慢，需要吸收氢气至少60分钟的时间慢，并且在非常高的操作温度（300-400°C）中需要时间。本研究的目的是改善基于Mg的储氢材料的氢解吸温度。在这项工作中，我们在MGH_2中使用纳米镍（Ni）作为催化剂，并通过反应性机械研磨方法获得。研磨的持续时间在2小时（软铣削）中用2mol％Ni催化剂进行，并在氢气氛（10巴）下研磨。结果，少量2摩尔％Ni以纳米级为适用于改善MGH2的动力学的合适催化剂，其在300℃下可以在10分钟内吸收5.5wt％的氢。很明显，少量纳米粒子尺寸的催化剂更好，同时允许在短时间内减少铣削过程。

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