Optimization of microwave assisted leaching of vanadium from spent catalyst based on response surface methodology

被引：0
|
作者：
Ma Z.-Y. [1 ,2 ,3 ]
Liu Y. [1 ,2 ,3 ]
Zhou J.-K. [1 ,2 ,3 ]
Liu M.-D. [1 ,2 ,3 ]
Liu Z.-Z. [1 ,2 ,3 ]
机构：
[1] Guangdong Institute of Resources Comprehensive Utilization, Guangdong Academy of Sciences, Guangzhou
[2] State Key Laboratory of Separation and Comprehensive Utilization of Rare Metals, Guangdong Academy of Sciences, Guangzhou
[3] Guangdong Provincial Key Laboratory of Development and Comprehensive Utilization of Mineral Resources, Guangdong Academy of Sciences, Guangzhou
来源：
Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals | 2019年 / 29卷 / 06期
基金：
中国国家自然科学基金;
关键词：
Interaction; Microwave; Response surface methodology; Spent catalyst; Vanadium;
D O I：
10.19476/j.ysxb.1004.0609.2019.06.20
中图分类号：
学科分类号：
摘要：
The microwave assisted alkaline leaching of spent petrochemical catalyst was optimized using response surface methodology (RSM). The quadratic polynomial regression model charactering effect factors, such as microwave power, reaction time and NaOH concentration, and their interactions on the vanadium leaching efficiency were established. The results show that the effect of reaction time on the vanadium leaching efficiency is the most significant. The interactions of reaction time and NaOH concentration, microwave power and NaOH concentration have significant impacts on the vanadium leaching efficiency. The optimum conditions of microwave assisted leaching process are as follows: microwave power of 648 W, reaction time of 13.50 min and NaOH concentration of 87.51 g/L. Under the optimized conditions, the vanadiumleaching efficiency of 97.55%±0.18% is obtained, which are well agree with the values predicted by the model. The mechanism of microwave-assisted leaching systems was studied. The enhancement on the leaching efficiency of vanadium is attributed to the temperature gradient between solid and liquid and generation of cracks on mineral surface. © 2019, Science Press. All right reserved.
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页码：1308 / 1315
页数：7
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