Conversion of Carbonyl Sulfide Using a Low-Temperature Discharge Approach

Abstract

Carbonyl sulfide (COS) are usually yielded from the petrifaction industry or steel-making plants. In this study, a low-temperature radio-frequency (RF) plasma approach was used to destruct COS for removing sulfur. The results showed that at an inlet O 2 /COS molar ratio of 3, the removal efficiency of COS reached 98.4% at 20 W and 4000 N/m 2 , with the major product being SO 2 with small amounts of sulfur deposition. The removal efficiency of COS was lower in the H 2-containing condition than in the O 2-containg one. However, when H 2 was added into the COS/N 2 mixtures, the products, including major elemental sulfur with CS 2 as a minor product, were easily collected and recovered.