Large-Scale Synthesis of MgCl2·6NH3 as an Ammonia Storage Material

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• 作者：Hongliang Zhu ; Xiaoyun Gu ; Kuihong Yao ; Linhui Gao ; Jianjun Chen
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2009
• 出版时间：June 3, 2009
• 年：2009
• 卷：48
• 期：11
• 页码：5317-5320
• 全文大小：198K
• 年卷期：v.48,no.11(June 3, 2009)
• ISSN：1520-5045

文摘

This Article reveals that magnesium chloride hexammoniate (MgCl₂·6NH₃) can be prepared by the reaction between magnesium silicide (Mg₂Si) and ammonium chloride (NH₄Cl) in liquid ammonia, which was developed by Komatsu Electronic Metals Corp. to produce silane (SiH₄). The MgCl₂·6NH₃ product was characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), and thermogravimetry (TGA). XRD study showed that the solid product prepared by the experiment using a Mg₂Si/NH₄Cl mass ratio of 1:2.8 was phase-pure and highly crystalline MgCl₂·6NH₃. The FTIR spectrum exhibited the characteristic bands of coordinated ammonia molecules. In addition, the ammonia desorption behavior of the product were investigated by TGA, and its desorption reactions are given in this Article. In summary, this Article provides a new large-scale and low-cost synthesis method to produce MgCl₂·6NH₃, which has been emerging as an interesting functional material.