Leaching kinetics of rhodium from spent automotive catalyst

被引：0

作者：

Hu D. ^{[1
,2
]}

Yu J. ^{[1
,2
]}

You G. ^{[2
]}

Zhao Y. ^{[1
]}

Bi X. ^{[1
]}

机构：

[1] Kunming Sino-Platinum Metals Catalyst Co. Ltd, Kunming

[2] Kunming Institute of Precious Metals, State Key Laboratory of Advanced Technology of Comprehensive Utilization of Platinum Metals, Kunming

来源：

Xiyou Jinshu/Chinese Journal of Rare Metals | 2016年 / 40卷 / 02期

关键词：

Apparent activation energy; Leaching kinetics; Reaction progression; Rhodium; Spent automotive catalyst;

D O I：

10.13373/j.cnki.cjrm.2016.02.008

中图分类号：

学科分类号：

摘要：

Recycling platinum group metals (PGMs) from spent automobile catalysts which have become the most important PGMs secondary resources is becoming quite important, due to the limitation of natural resource deposits of PGMs and the rapid industrial development. Among the processes of PGMs' recycling from spent automobile catalysts, the hydrometallurgical leaching drew extensive concerns, but the recovery of Rh was the most inefficient. Based on the effects of liquid-solid rate, sodium chlorate, reaction temperature, [H+] concentration, [Cl-] concentration on leaching of rhodium, the leaching kinetics of rhodium extracted from spent automotive catalyst in HCl-H2SO4-NaClO3 medium was studied. The results showed that the leaching process followed the shrinking core model, which indicated that the control factor of the leaching process was the surface reaction. Enhancing the leaching temperature, initial [H+] and initial [Cl-] would accelerate the speed of rhodium leaching and raise the leaching rate. The ratio of liquid to solid and the dosage of oxidant NaClO3 had few influences on the leaching rate of rhodium. The apparent activation energy was determined as 66.719 kJ·mol-1 within the selected temperature range by Arrhenius equation. The apparent reaction progressions of [H+] and [Cl-] were 0.779 and 0.296, respectively. What was more, the correlation coefficients fitting experimental data were more than 0.97.The kinetics study of leaching rhodium from spent automotive catalyst provided some references for the recycle of platinum group metals in industry practice. © Editorial Office of Chinese Journal of Rare Metals. All right reserved.

引用

页码：143 / 148

页数：5

共 19 条

[1] Liu Y.W., Yang B., Li Y., Applications of platinum-group metals in modern industries, Southern Metals, 2, (2009)
[2] Han S.L., Wu X.L., Wang H., Wang Y.M., He X.T., Research progress on platinum group metals recovery from spent automobile catalyst, Mining and Metallurgy, 19, 2, (2010)
[3] Wu X.F., Wang Y.H., Tong W.F., A novel extraction process of PGM from spent automobile catalyst converters by wet-fire metallurgical technique combined method, Precious Metals, 31, 4, (2010)
[4] Wang Y.H., Wu X.F., Tong W.F., Present research status and developments on recycling technology of renewable resources of platinum group metals, Precious Metals, 31, 1, (2011)
[5] Jha M.K., Lee J., Kim M., Jeong J., Kim B.S., Kumar V., Hydrometallurgical recovery/recycling of platinum by the leaching of spent catalysts: a review, Hydrometallurgy, 133, (2013)
[6] Chen J., Huang K., A new technique for extraction of platinum group metals by pressure cyanidation, Hydrometallurgy, 82, 3-4, (2006)
[7] Angelidis T.N., Development of a laboratory scale hydrometallurgical procedure for the recovery of Pt and Rh from spent automotive catalysts, Topics in Catalysis, 16-17, 1-4, (2001)
[8] Wang M., Dai X., Wu J.H., Zhang B.G., Wu Y.Q., Chen T.Z., Recovery of platinum from spent catalysts by sintering-leaching, Precious Metals, 32, 4, (2011)
[9] Li Y.W., Qi X.D., Study on leaching of palladium-group metals from spent auto-catalysts, Journal of South China Normal University, 2, (2008)
[10] Cao Y., Harjanto S., Shibayama A., Naitoh I., Nanami T., Kasahara K., Okumura Y., Fujita T., Kinetic study on the leaching of Pt, Pd and Rh from automotive catalyst residue by using chloride solutions, Materials Transactions, 47, 8, (2006)

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