Reaction Mechanism and Process Control of Hydrogen Reduction of Ammonium Perrhenate

doi:10.3390/met10050640

IMR OpenIR

	Reaction Mechanism and Process Control of Hydrogen Reduction of Ammonium Perrhenate
	Tang, Junjie; Sun, Yuan; Zhang, Chunwei; Wang, Long; Zhou, Yizhou; Fang, Dawei; Liu, Yan
	2020-05-01
发表期刊	METALS
卷号	10 期号:5
摘要	The preparation of rhenium powder by a hydrogen reduction of ammonium perrhenate is the only industrial production method. However, due to the uneven particle size distribution and large particle size of rhenium powder, it is difficult to prepare high-density rhenium ingot. Moreover, the existing process requires a secondary high-temperature reduction and the deoxidization process is complex and requires a high-temperature resistance of the equipment. Attempting to tackle the difficulties, this paper described a novel process to improve the particle size distribution uniformity and reduce the particle size of rhenium powder, aiming to produce a high-density rhenium ingot, and ammonium perrhenate is completely reduced by hydrogen at a low temperature. When the particle size of the rhenium powder was 19.74 mu m, the density of the pressed rhenium ingot was 20.106 g/cm(3), which was close to the theoretical density of rhenium. In addition, the hydrogen reduction mechanism of ammonium perrhenate was investigated in this paper. The results showed that the disproportionation of ReO3 decreased the rate of the reduction reaction, and the XRD and XPS patterns showed that the increase in the reduction temperature was conducive to increasing the reduction reaction rate and reducing the influence of disproportionation on the reduction process. At the same reduction temperature, reducing the particle sizes of ammonium perrhenate was conducive to increasing the hydrogen reduction rate and reducing the influence of the disproportionation.
DOI	10.3390/met10050640
WOS记录号	WOS:000540220000088
引用统计	被引频次：8[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/155703
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Tang, Junjie,Sun, Yuan,Zhang, Chunwei,et al. Reaction Mechanism and Process Control of Hydrogen Reduction of Ammonium Perrhenate[J]. METALS,2020,10(5).
APA	Tang, Junjie.,Sun, Yuan.,Zhang, Chunwei.,Wang, Long.,Zhou, Yizhou.,...&Liu, Yan.(2020).Reaction Mechanism and Process Control of Hydrogen Reduction of Ammonium Perrhenate.METALS,10(5).
MLA	Tang, Junjie,et al."Reaction Mechanism and Process Control of Hydrogen Reduction of Ammonium Perrhenate".METALS 10.5(2020).