Kinetics of sulfur transfer from H2S to Fe1-xS

V. K. Pareek; T. A. Ramanarayanan; J. D. Mumford

Kinetics of sulfur transfer from H₂S to Fe_1-xS

V. K. Pareek, T. A. Ramanarayanan, J. D. Mumford

Chemistry

Research output: Contribution to journal › Article › peer-review

5 Scopus citations

Abstract

The rate of sulfur transfer across the gas/solid interface involving H₂S(g) and Fe_1-xS surface has been investigated using resistance relaxation measurements at 600°C. The rate of the oxidation reaction incorporating sulfur into Fe_1-xS has been found to decrease with sulfur activity (a_s) in the sample as (a_s)^-2/3 while the rate of the reduction reaction corresponding to sulfur loss is found to increase with the sulfur activity as (a_s) ^1/3The kinetic finding has been combined with the appropriate defect models for FeS to identify the rate limiting step for the sulfur transfer reaction from H₂S to FeS. Accordingly, the rate limiting step has been identified to be: H₂S(g) + 2e^- ⇌ S²-(ad) + H₂(g).

Original language	English (US)
Pages (from-to)	223-228
Number of pages	6
Journal	Catalysis Letters
Volume	46
Issue number	3
State	Published - Jan 1 1997

All Science Journal Classification (ASJC) codes

Catalysis
General Chemistry

Keywords

Iron sulfide
Non-stoichiometry
Rate limiting step
Reaction pathways
Resistance relaxation
Sulfur activity

Cite this

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title = "Kinetics of sulfur transfer from H2S to Fe1-xS",

abstract = "The rate of sulfur transfer across the gas/solid interface involving H2S(g) and Fe1-xS surface has been investigated using resistance relaxation measurements at 600°C. The rate of the oxidation reaction incorporating sulfur into Fe1-xS has been found to decrease with sulfur activity (as) in the sample as (as)-2/3 while the rate of the reduction reaction corresponding to sulfur loss is found to increase with the sulfur activity as (as) 1/3The kinetic finding has been combined with the appropriate defect models for FeS to identify the rate limiting step for the sulfur transfer reaction from H2S to FeS. Accordingly, the rate limiting step has been identified to be: H2S(g) + 2e- ⇌ S2-(ad) + H2(g).",

keywords = "Iron sulfide, Non-stoichiometry, Rate limiting step, Reaction pathways, Resistance relaxation, Sulfur activity",

author = "Pareek, {V. K.} and Ramanarayanan, {T. A.} and Mumford, {J. D.}",

year = "1997",

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language = "English (US)",

volume = "46",

pages = "223--228",

journal = "Catalysis Letters",

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TY - JOUR

T1 - Kinetics of sulfur transfer from H2S to Fe1-xS

AU - Pareek, V. K.

AU - Ramanarayanan, T. A.

AU - Mumford, J. D.

PY - 1997/1/1

Y1 - 1997/1/1

N2 - The rate of sulfur transfer across the gas/solid interface involving H2S(g) and Fe1-xS surface has been investigated using resistance relaxation measurements at 600°C. The rate of the oxidation reaction incorporating sulfur into Fe1-xS has been found to decrease with sulfur activity (as) in the sample as (as)-2/3 while the rate of the reduction reaction corresponding to sulfur loss is found to increase with the sulfur activity as (as) 1/3The kinetic finding has been combined with the appropriate defect models for FeS to identify the rate limiting step for the sulfur transfer reaction from H2S to FeS. Accordingly, the rate limiting step has been identified to be: H2S(g) + 2e- ⇌ S2-(ad) + H2(g).

AB - The rate of sulfur transfer across the gas/solid interface involving H2S(g) and Fe1-xS surface has been investigated using resistance relaxation measurements at 600°C. The rate of the oxidation reaction incorporating sulfur into Fe1-xS has been found to decrease with sulfur activity (as) in the sample as (as)-2/3 while the rate of the reduction reaction corresponding to sulfur loss is found to increase with the sulfur activity as (as) 1/3The kinetic finding has been combined with the appropriate defect models for FeS to identify the rate limiting step for the sulfur transfer reaction from H2S to FeS. Accordingly, the rate limiting step has been identified to be: H2S(g) + 2e- ⇌ S2-(ad) + H2(g).

KW - Iron sulfide

KW - Non-stoichiometry

KW - Rate limiting step

KW - Reaction pathways

KW - Resistance relaxation

KW - Sulfur activity

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M3 - Article

SN - 1011-372X

VL - 46

SP - 223

EP - 228

JO - Catalysis Letters

JF - Catalysis Letters

IS - 3

ER -

Kinetics of sulfur transfer from H₂S to Fe_1-xS

Abstract

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