GYIG OpenIR  > 地球内部物质高温高压实验室
In Situ Electrochemical Investigation of Acidic Pressure Oxidation of Pyrite at 160-240 degrees C
Can Cu;  Heping Li;  Sen Lin;  Pan Wang
2018
Source PublicationJournal of The Electrochemical Society
Volume165Issue:5Pages:C289-C294
Abstract

In situ electrochemical studies on the oxidation behavior of pyrite in 0.1 M H2SO4 solution in the temperature range of 160 to 240 degrees C were performed by measurements of electrochemical impedance spectroscopy (EIS), linear polarization, potentiodynamic polarization and potentiostatic polarization. Results showed that with the increase of temperature, the anodic current density increased, while the corrosion potential (E-corr), polarization resistance, charge transfer resistance (R-ct) and pore resistance (R-pore) decreased. The change of these electrochemical parameters indicated that the increase of temperature promoted the dissolution of pyrite by accelerating the electrochemical step and weakening of the porous passive film. EIS studies with different applied potentials at 240 degrees C revealed that both Rct and Rpore decreased with increasing applied potential. As the potential increased to 400 mV, the time constant relating to the porous passive film disappeared. These changes demonstrated that sulfur yield was dependent on the potential, and the sulfur yield approached zero at 400 mV at the temperature of 240 degrees C. The values of Ea indicated that pyrite oxidation kinetics were limited by the rate of electrochemical reaction.

Indexed BySCI
Language英语
Document Type期刊论文
Identifierhttp://ir.gyig.ac.cn/handle/42920512-1/8750
Collection地球内部物质高温高压实验室
Affiliation1.Key Laboratory of High-temperature and High-pressure Study of the Earth’s Interior, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, People’s Republic of China
2.University of Chinese Academy of Sciences, Beijing, 100049, People’s Republic of China
Recommended Citation
GB/T 7714
Can Cu;Heping Li;Sen Lin;Pan Wang. In Situ Electrochemical Investigation of Acidic Pressure Oxidation of Pyrite at 160-240 degrees C[J]. Journal of The Electrochemical Society,2018,165(5):C289-C294.
APA Can Cu;Heping Li;Sen Lin;Pan Wang.(2018).In Situ Electrochemical Investigation of Acidic Pressure Oxidation of Pyrite at 160-240 degrees C.Journal of The Electrochemical Society,165(5),C289-C294.
MLA Can Cu;Heping Li;Sen Lin;Pan Wang."In Situ Electrochemical Investigation of Acidic Pressure Oxidation of Pyrite at 160-240 degrees C".Journal of The Electrochemical Society 165.5(2018):C289-C294.
Files in This Item:
File Name/Size DocType Version Access License
In Situ Electrochemi(843KB)期刊论文作者接受稿开放获取CC BY-NC-SAView Application Full Text
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Can Cu;Heping Li;Sen Lin;Pan Wang]'s Articles
Baidu academic
Similar articles in Baidu academic
[Can Cu;Heping Li;Sen Lin;Pan Wang]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Can Cu;Heping Li;Sen Lin;Pan Wang]'s Articles
Terms of Use
No data!
Social Bookmark/Share
File name: In Situ Electrochemical Investigation of Acidic Pressure Oxidation of Pyrite at 160-240 degrees C.pdf
Format: Adobe PDF
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.