Laboratory validation of method of solvent extraction for removal of sulphur compounds from mineral oil

Author

Akshatha, A. ; Rajan, J. Sundara ; Ramachandra, H.

Author_Institution

R&D Manage. Div., Central Power Res. Inst., Bangalore, India

Volume

22

Issue

5

fYear

2015

fDate

10/1/2015 12:00:00 AM

Firstpage

2572

Lastpage

2580

Abstract

The presence of corrosive sulphur compounds in mineral oil is a serious problem affecting the life of transformers. There are several techniques available to remove corrosive sulphur and among them the method of solvent extraction is useful for complete removal of sulphur compounds. In this investigation, laboratory experiments were carried out to validate method of solvent extraction for removal of sulphur compounds like Dibenzyl disulphide and Mercaptan sulphur from mineral oil. The optimum oil to solvent ratio, solvent to co-solvent ratio are investigated and discussed. Efficiency of method of solvent extraction for removal of sulphur compounds is demonstrated on a laboratory scale and further improvements to properties of mineral oil is proposed by the use of conventional reclamation techniques.

Keywords

minerals; separation; sulphur compounds; transformer oil; corrosive sulphur compounds; dibenzyl disulphide; laboratory validation; mercaptan sulphur; mineral oil; reclamation techniques; solvent extraction method; sulphur compounds removal; Aging; Compounds; Minerals; Oil insulation; Power transformer insulation; Solvents; Sulfur; DBDS; Mercaptan sulphur; N-methyl-pyrrolidone; copper corrosion; mineral oil reclamation; paper oil insulation; total sulphur;

fLanguage

English

Journal_Title

Dielectrics and Electrical Insulation, IEEE Transactions on

Publisher

ieee

ISSN

1070-9878

Type

jour

DOI

10.1109/TDEI.2015.005100

Filename

7311032