Production of hydrogen and sulfur from hydrogen sulfide

Zaman, Jasimuz; Chakma, A.

doi:10.1016/0378-3820(94)00085-8

Cited by 228 publications

(119 citation statements)

References 107 publications

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“…The concentrations of ionic species are very small and therefore the reactions of ionic species may be ignored. 44 The recognized CH 4 …”

Section: Resultsmentioning

confidence: 99%

“…Selectivity is calculated as (4) where S Cn represents the selectivity to C 2 or C 3 hydrocarbons or H 2 , n is the molecular carbon number of the hydrocarbons or 0.5 for H 2 , and x Cn is the mole fraction of C 2 or C 3 hydrocarbons or H 2 at the outlet. The power input to the reactor is estimated as…”

Section: Figure 1 Experimental Setupmentioning

confidence: 99%

“…Operating parameters: 20kV, 1280pF, 14psig, pure CH 4 charge voltages is limited to that range which produces a corona discharge, given the reactor geometry, gas pressure, and gas composition. This range is roughly 15 to 25 kV for our reactor and operating conditions.…”

Section: Frequency (Hz) Ch4 Conversion (%)mentioning

confidence: 99%

“…2,3 Previous studies using thermal or catalytic decomposition of H 2 S to recover H 2 and elemental sulfur have demonstrated that this conversion is feasible, but the results have not been economically viable due to large energy requirements associated with high reaction temperatures. [4][5][6][7][8] Typical required reaction temperatures are 800°C for the catalytic systems and 2000°C for complete thermal decomposition. 5 Other researchers have used plasma reactors to dissociate H 2 S, but again the energy efficiency of the processes has been low, presumably because many successive dissociation-recombination processes serve only to recreate the reactant H 2 S and produce heat before H 2 is finally formed as a product.…”

Section: Introductionmentioning

confidence: 99%

“…From these studies, the primary product yields for each reactor are a unique function of the specific energy input and independent of the reactor size and whether the gas flow or the power input is varied or fixed. Hsieh et al 27 obtained CH 4 conversion of 80%, with flow rate of 50 ml/min (0.11 ft 3 /h) using a radio frequency plasma reactor. They concluded that decreasing the mean free paths of the reactants at higher operational pressures resulted in less acceleration of ions and electrons and hence fewer reactions.…”

Section: Introductionmentioning

confidence: 99%

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

Argyle¹,

Ackerman²,

Muknahallipatna³

et al. 2004

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The goal of this experimental project is to design and fabricate a reactor and membrane test cell to dissociate hydrogen sulfide (H 2 S) in a non-thermal plasma and recover hydrogen (H 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 (655×10 -6 m 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 2 and C 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 39.4×10 -6 m 3 /s (5 ft 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 ~50% higher with niobium and platinum coated stainless steel cathodes than with a stainless steel cathode.

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“…The concentrations of ionic species are very small and therefore the reactions of ionic species may be ignored. 44 The recognized CH 4 …”

Section: Resultsmentioning

confidence: 99%

Section: Figure 1 Experimental Setupmentioning

confidence: 99%

Section: Frequency (Hz) Ch4 Conversion (%)mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

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

Argyle¹,

Ackerman²,

Muknahallipatna³

et al. 2004

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Hydrogen Production

2020

Synthesis Gas

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Warm Discharges for Fuel Conversion

Gutsol

2010

Handbook of Combustion

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The sections in this article are Introduction Fuel Conversion Thermal, Cold, and Warm Plasma Industrial Fuel Conversion Using Thermal Plasma Warm Plasma for Plasma‐Assisted Partial Oxidation ( PAPO ) Low current (Gliding) Arcs and Glow Discharges Microwave Discharges for PAPO and Plasma Catalysis Warm Plasma for Other Fuel Conversion Processes Outlook Summary

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Production of hydrogen and sulfur from hydrogen sulfide

Cited by 228 publications

References 107 publications

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

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

Hydrogen Production

Warm Discharges for Fuel Conversion

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