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Production of hydrogen and sulfur from hydrogen sulfide in a nonthermal-plasma pulsed corona discharge reactor
Production of hydrogen and sulfur from hydrogen sulfide in a nonthermal-plasma pulsed corona discharge reactor
- Source :
- Chemical Engineering Science. 62:2216-2227
- Publication Year :
- 2007
- Publisher :
- Elsevier BV, 2007.
-
Abstract
- 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.
- Subjects :
- 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
Subjects
Details
- ISSN :
- 00092509
- Volume :
- 62
- Database :
- OpenAIRE
- Journal :
- Chemical Engineering Science
- Accession number :
- edsair.doi...........0ae1bf6199965bb38b684a7f767cc68f
- Full Text :
- https://doi.org/10.1016/j.ces.2006.12.052