Kinetics of hydrogen sulfide decomposition in a DBD plasma reactor operated at high temperature

能源化学(英文) ›› 2013, Vol. 22 ›› Issue (3): 382-386.

Kinetics of hydrogen sulfide decomposition in a DBD plasma reactor operated at high temperature

E. Linga Reddy, J. Karuppiah, Ch. Subrahmanyam

Energy and Environmental Research Lab, Department of Chemistry, Indian Institute of Technology (IIT) Hyderabad, Yeddumailaram, Andhra Pradesh, India-502205

收稿日期:2012-11-26 修回日期:2013-03-06 出版日期:2013-05-20 发布日期:2013-05-31
通讯作者: Ch. Subrahmanyam
基金资助:
The authors gratefully acknowledge to the Ministry of New and Renewable Energy (MNRE)-New Delhi, for financial support (Reference No. 103/117/2008-NT).

Kinetics of hydrogen sulfide decomposition in a DBD plasma reactor operated at high temperature

E. Linga Reddy, J. Karuppiah, Ch. Subrahmanyam

Energy and Environmental Research Lab, Department of Chemistry, Indian Institute of Technology (IIT) Hyderabad, Yeddumailaram, Andhra Pradesh, India-502205

Received:2012-11-26 Revised:2013-03-06 Online:2013-05-20 Published:2013-05-31
Supported by:
The authors gratefully acknowledge to the Ministry of New and Renewable Energy (MNRE)-New Delhi, for financial support (Reference No. 103/117/2008-NT).

摘要/Abstract

摘要： The present study investigates the kinetics of hydrogen sulfide (H₂S) 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 H₂S 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 H₂S 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 H₂S decomposition, probably due to the multiple complex reactions involved in H₂S decomposition, whereas Michaelis-Menten model was satisfactory. Typical results indicated that the reaction order approached zero with increasing inlet concentration.

关键词: dielectric barriar discharge, hydrogen sulfide, kinetics, temperature

Abstract: The present study investigates the kinetics of hydrogen sulfide (H₂S) 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 H₂S 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 H₂S 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 H₂S decomposition, probably due to the multiple complex reactions involved in H₂S decomposition, whereas Michaelis-Menten model was satisfactory. Typical results indicated that the reaction order approached zero with increasing inlet concentration.

Key words: dielectric barriar discharge, hydrogen sulfide, kinetics, temperature

E. Linga Reddy, J. Karuppiah, Ch. Subrahmanyam. Kinetics of hydrogen sulfide decomposition in a DBD plasma reactor operated at high temperature[J]. 能源化学(英文), 2013, 22(3): 382-386.

E. Linga Reddy, J. Karuppiah, Ch. Subrahmanyam. Kinetics of hydrogen sulfide decomposition in a DBD plasma reactor operated at high temperature[J]. Journal of Energy Chemistry, 2013, 22(3): 382-386.

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Kinetics of hydrogen sulfide decomposition in a DBD plasma reactor operated at high temperature

Kinetics of hydrogen sulfide decomposition in a DBD plasma reactor operated at high temperature

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