Energy analysis of self-ignition combustion synthesis for producing rare-earth-based hydrogen storage alloy
Energy analysis of self-ignition combustion synthesis for producing rare-earth-based hydrogen storage alloy
复制标题
自燃燃烧合成生产稀土基储氢合金的能量分析
DOI：
10.1016/j.ijhydene.2012.03.109
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发表时间：
2012
影响因子：
7.2
通讯作者：
Naoto Yasuda
中科院分区：
文献类型：
--
作者：
Uno;Takeru;Naoto Yasuda;Naoto Yasuda
提出了一种新的稀土贮氢合金生产系统。利用金属钙的氢化热进行自燃燃烧合成。计算了用该系统和传统系统生产1 kg LaNi 5合金所需的一次能源和总（火用）损失。结果表明，在两个系统中，原材料的生产占总EXL的90%以上。具体而言，钙的使用对用于生产LaNi 5合金的系统的总EXL具有决定性影响。与常规系统相比，该系统的总EXL降低了14.6MJ/kg-LaNi_5。由于SICS利用了钙的氢化热降低了加热温度，且产物不经活化处理就吸收了氢，因此具有显著的节能效果。
A new production system for rare-earth-based hydrogen storage alloys is proposed. We applied self-ignition combustion synthesis (SICS) utilizing hydrogenation heat of metallic calcium. The required primary energy and total exergy loss (EXL) for the production of 1kg of LaNi5alloy with the proposed and conventional systems were evaluated. The results revealed that the production of raw materials accounted for more than 90% of the total EXL in both systems. Specifically, the use of calcium had decisive effects on the total EXL of the system for producing LaNi5alloy. The proposed system reduced the total EXL by 14.6MJ/kg-LaNi5as compared with the conventional system. The SICS was remarkably exergy-saving because the heating temperature was decreased by utilizing the hydrogenation heat of calcium and the product absorbed hydrogen without an activation treatment.