E, Linga Reddy and Karuppiah, J and Ch, Subrahmanyam
(2013)
Kinetics of hydrogen sulfide decomposition in a DBD plasma reactor operated at high temperature.
Journal of Energy Chemistry, 22 (3).
pp. 382-386.
ISSN 2095-4956
Abstract
The present study investigates the kinetics of hydrogen sulfide (H
2
S) decomposition into hydrogen and sulfur carried out in a nonthermal
plasma dielectric barrier discharge (NTP-DBD) reactor operated at
∼
430 K for in situ removal of sulfur condensed inside the reactor walls.
The dissociation of H
2
S was primarily initiated by the excitation of carrier gas (Ar) through electron collisions which appeared to be the
rate determining step. The experiments were carried out with initial concentration of H
2
S varied between 5 and 25 vol% at 150 mL/min (at
standard temperature and pressure) flow rate in the input power range of 0.5 to 2 W. The reaction rate model based on continuous stirred tank
reactor (CSTR) model failed to explain the global kinetics of H
2
S decomposition, probably due to the multiple complex reactions involved in
H
2
S decomposition, whereas Michaelis-Menten model was satisfactory. Typical results indicated that the reaction order approached zero with
increasing inlet concentration.
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