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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. Experiments involving methane conversion reactions were conducted with a preliminary pulsed corona discharge reactor design in order to test and improve the reactor and membrane designs using a non-toxic reactant. This report details the direct methane conversion experiments to produce hydrogen, acetylene, and higher hydrocarbons utilizing a co-axial cylinder (CAC) corona discharge reactor, pulsed with a thyratron switch. The reactor was designed to accommodate relatively high flow rates (655 x 10{sup -6} m{sup 3}/s) representing a pilot scale easily converted to commercial scale. Parameters expected to influence methane conversion including pulse frequency, charge voltage, capacitance, residence time, and electrode material were investigated. Conversion, selectivity and energy consumption were measured or estimated. C{sub 2} and C{sub 3} hydrocarbon products were analyzed with a residual gas analyzer (RGA). In ordermore » to obtain quantitative results, the complex sample spectra were de-convoluted via a linear least squares method. Methane conversion as high as 51% was achieved. The products are typically 50%-60% acetylene, 20% propane, 10% ethane and ethylene, and 5% propylene. First Law thermodynamic energy efficiencies for the system (electrical and reactor) were estimated to range from 38% to 6%, with the highest efficiencies occurring at short residence time and low power input (low specific energy) where conversion is the lowest (less than 5%). The highest methane conversion of 51% occurred at a residence time of 18.8 s with a flow rate of 39.4 x 10{sup -6} m{sup 3}/s (5 ft{sup 3}/h) and a specific energy of 13,000 J/l using niobium and platinum coated stainless steel tubes as cathodes. Under these conditions, the First Law efficiency for the system was 8%. Under similar reaction conditions, methane conversions were {approx}50% higher with niobium and platinum coated stainless steel cathodes than with a stainless steel cathode.« less

Authors:
; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
University of Wyoming (US)
Sponsoring Org.:
(US)
OSTI Identifier:
831182
DOE Contract Number:  
FC26-03NT41963
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: 1 Jul 2004
Country of Publication:
United States
Language:
English
Subject:
03 NATURAL GAS; 08 HYDROGEN; 36 MATERIALS SCIENCE; ACETYLENE; CATHODES; CORONA DISCHARGES; ENERGY CONSUMPTION; ETHANE; ETHYLENE; FLOW RATE; HYDROGEN; HYDROGEN SULFIDES; MEMBRANES; METHANE; NIOBIUM; PLATINUM; POWER INPUT; PROPANE; PROPYLENE; STAINLESS STEELS; THERMODYNAMICS; THYRATRONS; TRANSITION ELEMENTS; VANADIUM

Citation Formats

Argyle, Morris D, Ackerman, John F, Muknahallipatna, Suresh, Hamann, Jerry C, Legowski, Stanislaw, Zhang, Ji-Jun, Zhao, Guibing, Alcanzare, Robyn J, Wang, Linna, and Plumb, Ovid A. NOVEL COMPOSITE HYDROGEN-PERMEABLE MEMBRANES FOR NON-THERMAL PLASMA REACTORS FOR THE DECOMPOSITION OF HYDROGEN SULFIDE. United States: N. p., 2004. Web. doi:10.2172/831182.
Argyle, Morris D, Ackerman, John F, Muknahallipatna, Suresh, Hamann, Jerry C, Legowski, Stanislaw, Zhang, Ji-Jun, Zhao, Guibing, Alcanzare, Robyn J, Wang, Linna, & Plumb, Ovid A. NOVEL COMPOSITE HYDROGEN-PERMEABLE MEMBRANES FOR NON-THERMAL PLASMA REACTORS FOR THE DECOMPOSITION OF HYDROGEN SULFIDE. United States. https://doi.org/10.2172/831182
Argyle, Morris D, Ackerman, John F, Muknahallipatna, Suresh, Hamann, Jerry C, Legowski, Stanislaw, Zhang, Ji-Jun, Zhao, Guibing, Alcanzare, Robyn J, Wang, Linna, and Plumb, Ovid A. Thu . "NOVEL COMPOSITE HYDROGEN-PERMEABLE MEMBRANES FOR NON-THERMAL PLASMA REACTORS FOR THE DECOMPOSITION OF HYDROGEN SULFIDE". United States. https://doi.org/10.2172/831182. https://www.osti.gov/servlets/purl/831182.
@article{osti_831182,
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 Zhang, Ji-Jun and Zhao, Guibing and Alcanzare, Robyn J and Wang, Linna and Plumb, Ovid A},
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. Experiments involving methane conversion reactions were conducted with a preliminary pulsed corona discharge reactor design in order to test and improve the reactor and membrane designs using a non-toxic reactant. This report details the direct methane conversion experiments to produce hydrogen, acetylene, and higher hydrocarbons utilizing a co-axial cylinder (CAC) corona discharge reactor, pulsed with a thyratron switch. The reactor was designed to accommodate relatively high flow rates (655 x 10{sup -6} m{sup 3}/s) representing a pilot scale easily converted to commercial scale. Parameters expected to influence methane conversion including pulse frequency, charge voltage, capacitance, residence time, and electrode material were investigated. Conversion, selectivity and energy consumption were measured or estimated. C{sub 2} and C{sub 3} hydrocarbon products were analyzed with a residual gas analyzer (RGA). In order to obtain quantitative results, the complex sample spectra were de-convoluted via a linear least squares method. Methane conversion as high as 51% was achieved. The products are typically 50%-60% acetylene, 20% propane, 10% ethane and ethylene, and 5% propylene. First Law thermodynamic energy efficiencies for the system (electrical and reactor) were estimated to range from 38% to 6%, with the highest efficiencies occurring at short residence time and low power input (low specific energy) where conversion is the lowest (less than 5%). The highest methane conversion of 51% occurred at a residence time of 18.8 s with a flow rate of 39.4 x 10{sup -6} m{sup 3}/s (5 ft{sup 3}/h) and a specific energy of 13,000 J/l using niobium and platinum coated stainless steel tubes as cathodes. Under these conditions, the First Law efficiency for the system was 8%. Under similar reaction conditions, methane conversions were {approx}50% higher with niobium and platinum coated stainless steel cathodes than with a stainless steel cathode.},
doi = {10.2172/831182},
url = {https://www.osti.gov/biblio/831182}, journal = {},
number = ,
volume = ,
place = {United States},
year = {2004},
month = {7}
}