Catalytic behaviors of combined oxides derived from Mg/AlxFe1−x-Cl layered double hydroxides for H2S selective oxidationElectronic supplementary information (ESI) available. See DOI: 10.1039/c5cy00689a
A series of Mg 2 Al x Fe 1− x LDH compounds was synthesized by a one-step method. The structural and chemical properties were studied by various methods and the derived oxides were tested for H 2 S selective oxidation. It was observed that the iron species existed mainly in the form of isolated Fe 3...
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Format | Journal Article |
Language | English |
Published |
19.10.2015
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Abstract | A series of Mg
2
Al
x
Fe
1−
x
LDH compounds was synthesized by a one-step method. The structural and chemical properties were studied by various methods and the derived oxides were tested for H
2
S selective oxidation. It was observed that the iron species existed mainly in the form of isolated Fe
3+
species, α-Fe
2
O
3
, γ-Fe
2
O
3
and Fe
3
O
4
. Moreover, the nature of the iron oxides was varied with the rise in the iron content. Significantly, the catalysts exhibited high catalytic activity and reasonable durability at a relatively lower temperature and higher GHSV. The catalysts obeyed the step-wise mechanism for H
2
S selective catalytic oxidation. And the chemically adsorbed oxygen on the oxygen vacancies participated in the H
2
S selective oxidation reaction and played a key role in the H
2
S selective oxidation into elemental sulfur. The catalyst deactivation was due mainly to the deposit of elemental sulfur. Additionally, the small amount of the formed less active Fe
2
(SO
4
)
3
species also led to catalyst deactivation.
H
2
S was firstly adsorbed on the moderated basic site and then oxidized into elemental sulfur by Fe
3+
. |
---|---|
AbstractList | A series of Mg
2
Al
x
Fe
1−
x
LDH compounds was synthesized by a one-step method. The structural and chemical properties were studied by various methods and the derived oxides were tested for H
2
S selective oxidation. It was observed that the iron species existed mainly in the form of isolated Fe
3+
species, α-Fe
2
O
3
, γ-Fe
2
O
3
and Fe
3
O
4
. Moreover, the nature of the iron oxides was varied with the rise in the iron content. Significantly, the catalysts exhibited high catalytic activity and reasonable durability at a relatively lower temperature and higher GHSV. The catalysts obeyed the step-wise mechanism for H
2
S selective catalytic oxidation. And the chemically adsorbed oxygen on the oxygen vacancies participated in the H
2
S selective oxidation reaction and played a key role in the H
2
S selective oxidation into elemental sulfur. The catalyst deactivation was due mainly to the deposit of elemental sulfur. Additionally, the small amount of the formed less active Fe
2
(SO
4
)
3
species also led to catalyst deactivation.
H
2
S was firstly adsorbed on the moderated basic site and then oxidized into elemental sulfur by Fe
3+
. |
Author | Zhang, Xin Tang, Yuyin Hao, Zhengping Wang, Zhuo Li, Yang Qiao, Nanli Qu, Siqiu |
AuthorAffiliation | Department of Chemistry Chinese Academy of Sciences Research Center for Eco-Environmental Sciences Shaanxi Normal University Tsinghua University Center of Research & Development Shandong Sunway Petrochemical Engineering Share Co., Ltd School of Chemistry and Chemical Engineering Department of Environmental Nano-materials |
AuthorAffiliation_xml | – name: Shandong Sunway Petrochemical Engineering Share Co., Ltd – name: School of Chemistry and Chemical Engineering – name: Department of Chemistry – name: Chinese Academy of Sciences – name: Research Center for Eco-Environmental Sciences – name: Tsinghua University – name: Shaanxi Normal University – name: Center of Research & Development – name: Department of Environmental Nano-materials |
Author_xml | – sequence: 1 givenname: Xin surname: Zhang fullname: Zhang, Xin – sequence: 2 givenname: Zhuo surname: Wang fullname: Wang, Zhuo – sequence: 3 givenname: Yuyin surname: Tang fullname: Tang, Yuyin – sequence: 4 givenname: Nanli surname: Qiao fullname: Qiao, Nanli – sequence: 5 givenname: Yang surname: Li fullname: Li, Yang – sequence: 6 givenname: Siqiu surname: Qu fullname: Qu, Siqiu – sequence: 7 givenname: Zhengping surname: Hao fullname: Hao, Zhengping |
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DOI | 10.1039/c5cy00689a |
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Snippet | A series of Mg
2
Al
x
Fe
1−
x
LDH compounds was synthesized by a one-step method. The structural and chemical properties were studied by various methods and... |
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Title | Catalytic behaviors of combined oxides derived from Mg/AlxFe1−x-Cl layered double hydroxides for H2S selective oxidationElectronic supplementary information (ESI) available. See DOI: 10.1039/c5cy00689a |
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