Production of hydrogen and sulfur from hydrogen sulfide in a nonthermal-plasma pulsed corona discharge reactor
| Autor: | Morris D. Argyle, Sanil John, Stanislaw Legowski, Ji-Jun Zhang, Jerry Hamann, John Ackerman, Gui-Bing Zhao, Suresh Muknahallipatna |
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| Rok vydání: | 2007 |
| Předmět: |
Hydrogen
Applied Mathematics General Chemical Engineering Hydrogen sulfide Analytical chemistry chemistry.chemical_element General Chemistry Partial pressure Nonthermal plasma Sulfur Industrial and Manufacturing Engineering Dissociation (chemistry) chemistry.chemical_compound chemistry Corona discharge Hydrogen production |
| Zdroj: | Chemical Engineering Science. 62:2216-2227 |
| ISSN: | 0009-2509 |
| DOI: | 10.1016/j.ces.2006.12.052 |
| Popis: | Hydrogen sulfide ( H 2 S ) dissociation into hydrogen and sulfur has been studied in a pulsed corona discharge reactor (PCDR). Due to the high dielectric strength of pure H 2 S ( ∼ 2.9 times higher than air), a nonthermal plasma could not be sustained in pure H 2 S at discharge voltages up to 30 kV with our reactor geometry. Therefore, H 2 S was diluted with another gas with lower dielectric strength to reduce the breakdown voltage. Breakdown voltages of H 2 S in four balance gases (Ar, He, N 2 , and H 2 ) have been measured at different H 2 S concentrations and pressures. Breakdown voltages are proportional to the partial pressure of H 2 S and the balance gas. With increasing H 2 S concentrations, H 2 S conversion initially increases, reaches a maximum, and then decreases. H 2 S conversion and the reaction energy efficiency depend on the balance gas and H 2 S inlet concentrations. H 2 S conversion in atomic balance gases, such as Ar and He, is more efficient than that in diatomic balance gases, such as N 2 and H 2 . These observations can be explained by proposed reaction mechanisms of H 2 S dissociation in different balance gases. The results show that nonthermal plasmas are effective for dissociating H 2 S into hydrogen and sulfur. |
| Databáze: | OpenAIRE |
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