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Title: Novel Composite Hydrogen-Permeable Membranes for Non-Thermal Plasma Reactors for the Decomposition of Hydrogen Sulfide

Abstract

The goal of this experimental project is to design and fabricate a reactor and membrane test cell to dissociate hydrogen sulfide (H{sub 2}S) in a non-thermal plasma and recover hydrogen (H{sub 2}) 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 H{sub 2}S into hydrogen and sulfur. A nonthermal plasma cannot be produced in pure H{sub 2}S with our reactor geometry, even at discharge voltages of up to 30 kV, because of the high dielectric strength of pure H{sub 2}S ({approx}2.9 times higher than air). Therefore, H{sub 2}S was diluted in another gas with lower breakdown voltage (or dielectric strength). Breakdown voltages of H{sub 2}S in four balance gases (Ar, He, N{sub 2} and H{sub 2}) have been measured at different H{sub 2}S concentrations and pressures. Breakdown voltages are proportional to the partial pressure of H{sub 2}S and the balance gas. H{sub 2}S conversion and the reaction energy efficiency depend on the balance gas and H{submore » 2}S inlet concentrations. With increasing H{sub 2}S concentrations, H{sub 2}S conversion initially increases, reaches a maximum, and then decreases. H{sub 2}S conversion in atomic balance gases, such as Ar and He, is more efficient than that in diatomic balance gases, such as N{sub 2} and H{sub 2}. These observations can be explained by the proposed reaction mechanism of H{sub 2}S dissociation in different balance gases. The results show that nonthermal plasmas are effective for dissociating H{sub 2}S into hydrogen and sulfur.« less

Authors:
; ; ; ; ; ; ;
Publication Date:
Research Org.:
Univ. of Wyoming, Laramie, WY (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
878291
DOE Contract Number:  
FC26-03NT41963
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
08 HYDROGEN; 36 MATERIALS SCIENCE; ALLOYS; ATOMS; BREAKDOWN; CORONA DISCHARGES; DIELECTRIC MATERIALS; ENERGY EFFICIENCY; GASES; GEOMETRY; HYDROGEN; HYDROGEN SULFIDES; MEMBRANES; NIOBIUM; PARTIAL PRESSURE; REACTION KINETICS; SULFUR; TANTALUM; TRANSITION ELEMENTS; VANADIUM

Citation Formats

Argyle, Morris D, Ackerman, John F, Muknahallipatna, Suresh, Hamann, Jerry C, Legowski, Stanislaw, Zhao, Guibling, Zhang, Ji-Jun, and John, Sanil. Novel Composite Hydrogen-Permeable Membranes for Non-Thermal Plasma Reactors for the Decomposition of Hydrogen Sulfide. United States: N. p., 2005. Web. doi:10.2172/878291.
Argyle, Morris D, Ackerman, John F, Muknahallipatna, Suresh, Hamann, Jerry C, Legowski, Stanislaw, Zhao, Guibling, Zhang, Ji-Jun, & John, Sanil. Novel Composite Hydrogen-Permeable Membranes for Non-Thermal Plasma Reactors for the Decomposition of Hydrogen Sulfide. United States. https://doi.org/10.2172/878291
Argyle, Morris D, Ackerman, John F, Muknahallipatna, Suresh, Hamann, Jerry C, Legowski, Stanislaw, Zhao, Guibling, Zhang, Ji-Jun, and John, Sanil. Sat . "Novel Composite Hydrogen-Permeable Membranes for Non-Thermal Plasma Reactors for the Decomposition of Hydrogen Sulfide". United States. https://doi.org/10.2172/878291. https://www.osti.gov/servlets/purl/878291.
@article{osti_878291,
title = {Novel Composite Hydrogen-Permeable Membranes for Non-Thermal Plasma Reactors for the Decomposition of Hydrogen Sulfide},
author = {Argyle, Morris D and Ackerman, John F and Muknahallipatna, Suresh and Hamann, Jerry C and Legowski, Stanislaw and Zhao, Guibling and Zhang, Ji-Jun and John, Sanil},
abstractNote = {The goal of this experimental project is to design and fabricate a reactor and membrane test cell to dissociate hydrogen sulfide (H{sub 2}S) in a non-thermal plasma and recover hydrogen (H{sub 2}) 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 H{sub 2}S into hydrogen and sulfur. A nonthermal plasma cannot be produced in pure H{sub 2}S with our reactor geometry, even at discharge voltages of up to 30 kV, because of the high dielectric strength of pure H{sub 2}S ({approx}2.9 times higher than air). Therefore, H{sub 2}S was diluted in another gas with lower breakdown voltage (or dielectric strength). Breakdown voltages of H{sub 2}S in four balance gases (Ar, He, N{sub 2} and H{sub 2}) have been measured at different H{sub 2}S concentrations and pressures. Breakdown voltages are proportional to the partial pressure of H{sub 2}S and the balance gas. H{sub 2}S conversion and the reaction energy efficiency depend on the balance gas and H{sub 2}S inlet concentrations. With increasing H{sub 2}S concentrations, H{sub 2}S conversion initially increases, reaches a maximum, and then decreases. H{sub 2}S conversion in atomic balance gases, such as Ar and He, is more efficient than that in diatomic balance gases, such as N{sub 2} and H{sub 2}. These observations can be explained by the proposed reaction mechanism of H{sub 2}S dissociation in different balance gases. The results show that nonthermal plasmas are effective for dissociating H{sub 2}S into hydrogen and sulfur.},
doi = {10.2172/878291},
url = {https://www.osti.gov/biblio/878291}, journal = {},
number = ,
volume = ,
place = {United States},
year = {2005},
month = {10}
}