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Volume 7, No. 2, June 2007, Pages 251-259 PDF(147 KB)  
doi: 10.4209/aaqr.2007.03.0013   

Conversion of Carbonyl Sulfide Using a Low-Temperature Discharge Approach

Cheng-Hsien Tsai1, Ping-Szu Tsai1, Chih-Ju G. Jou2, Wei-Tung Liao3

1 Department of Chemical and Material Engineering, National Kaohsiung University of Applied Sciences, 415 Chien-Kung Road, Kaohsiung 807, Taiwan.
2 Department of Safety, Health and Environmental Engineering, National Kaohsiung First University of Science and Technology, Kaohsiung 811, Taiwan.
3 Department of Chemical and Material Engineering, Southern Taiwan University of Technology, Tainan 710, Taiwan




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 O2/COS molar ratio of 3, the removal efficiency of COS reached 98.4% at 20 W and 4000 N/m2, with the major product being SO2 with small amounts of sulfur deposition. The removal efficiency of COS was lower in the H2-containing condition than in the O2-containg one. However, when H2 was added into the COS/N2 mixtures, the products, including major elemental sulfur with CS2 as a minor product, were easily collected and recovered.



Keywords: Carbonyl sulfide; RF plasma; Destruction; Acid rain; Sulfur.



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