Operating Conditions for Hydriding Combustion Synthesis of Pure Mg2NiH4
Operating Conditions for Hydriding Combustion Synthesis of Pure Mg2NiH4
复制标题
氢化燃烧合成纯Mg2NiH4的操作条件
DOI：
10.2320/matertrans.42.1748
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发表时间：
2001
影响因子：
1.2
通讯作者：
J. Yagi
中科院分区：
文献类型：
--
作者：
T. Akiyama;Toshimitsu Negishi;Katsushi Saito;Liquan Li;J. Yagi
为了研究680 K下氢气压力与氢化保温时间的关系，在不同加热方式和氢气压力下进行了Mg 2 NiH 4的连续燃烧合成。所获得的结果以操作图的形式进行了总结，该操作图清楚地可视化了该过程工业化的可能操作条件。在680 K下，采用高压氢气和短保温时间可合成纯Mg 2NiH 4.在较低的氢气压力（0.5MPa）下，680 K保温7.2ks就可以得到纯度为10 0%的Mg 2 NiH 4产品。在623 K下测得的Mg 2NiH 4的压力组成等温线显示出非常接近理论值3.6%的储氢量，同时具有合理的平台。几个样品的比表面积表明，该产品是一种多孔材料。
To study the relationship between hydrogen pressure and holding time for hydrogenation at 680 K, hydriding combustion synthesis of Mg 2 NiH 4 were conducted at different heat patterns and hydrogen pressures. The obtained results were summarized in the form of an operating map, which visualized clearly the possible operating conditions for industrializing the process. Pure Mg 2 NiH 4 can be synthesized at a high pressure of hydrogen and a short holding time at 680 K. At a lower pressure of hydrogen such as 0.5 MPa, 7.2 ks of a holding time at 680 K is enough to obtain 100% pure Mg 2 NiH 4 as a product. The pressure composition isotherm of Mg 2 NiH 4 , obtained at 623 K, showed a hydrogen capacity very near the theoretical value of 3.6%, together with a reasonable plateau. The specific surface areas of several samples suggested that the product is a porous material.