Novel Composite Hydrogen-Permeable Membranes for Non-Thermal Plasma Reactors for the Decomposition of Hydrogen Sulfide Page: 3 of 34
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Abstract
The goal of this experimental project is to design and fabricate a reactor and
membrane test cell to dissociate hydrogen sulfide (H2S) in a non-thermal plasma and
recover hydrogen (H2) through a superpermeable multi-layer membrane.
Superpermeability of hydrogen atoms (H) has been reported by some researchers using
membranes made of Group V transition metals (niobium, tantalum, vanadium, and their
alloys), although it has yet to be confirmed in this study.
A pulsed corona discharge (PCD) reactor has been fabricated and used to
dissociate H2S into hydrogen and sulfur. A nonthermal plasma cannot be produced in
pure H2S with our reactor geometry, even at discharge voltages of up to 30 kV, because
of the high dielectric strength of pure H2S (-2.9 times higher than air). Therefore, H2S
was diluted in another gas with lower breakdown voltage (or dielectric strength).
Breakdown voltages of H2S in four balance gases (Ar, He, N2 and H2) have been
measured at different H2S concentrations and pressures. Breakdown voltages are
proportional to the partial pressure of H2S and the balance gas. H2S conversion and the
reaction energy efficiency depend on the balance gas and H2S inlet concentrations. With
increasing H2S concentrations, H2S conversion initially increases, reaches a maximum,
and then decreases. H2S conversion in atomic balance gases, such as Ar and He, is more
efficient than that in diatomic balance gases, such as N2 and H2. These observations can
be explained by the proposed reaction mechanism of H2S dissociation in different balance
gases. The results show that nonthermal plasmas are effective for dissociating H2S into
hydrogen and sulfur.
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Argyle, Morris D.; Ackerman, John F.; Muknahallipatna, Suresh; Hamann, Jerry C.; Legowski, Stanislaw; Zhao, Guibling et al. Novel Composite Hydrogen-Permeable Membranes for Non-Thermal Plasma Reactors for the Decomposition of Hydrogen Sulfide, report, October 1, 2005; United States. (https://digital.library.unt.edu/ark:/67531/metadc878356/m1/3/: accessed April 24, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.