Ultrasonic and Microwave Desulfurization of Coal in Tetrachloroethylene

Abstract

The extractive desulfurization of four high sulfur coals from China were promoted with ultrasonic and microwave in tetrachloroethylene organic solvents. It was shown that the joint promotion with ultrasonic and microwave had an active effect on extractive desulfurization. The rate of desulfurization increased with the increase of time in ultrasonic field as well as with the power of ultrasonic, but declined with the increase of the particle size of coal. The rate of desulfurization was not identical for different coal, which was perhaps related to the existed forms of organic sulfur in coal.

Keywords:

• coal
• extractive desulfurization
• microwave
• organic sulfur
• tetrachloroethylene
• ultrasonic

Acknowledgment

The auhors gratefully acknowledge the financial support of this study by the Natural Science Foundation of Shanxi Province No. 20041025.

Notes

^a *By difference.