Stable and selective perovskite catalyst for dehydrogenation of propane working with redox mechanism

Ryo Watanabe; Yoshiaki Hondo; Kei Mukawa; Choji Fukuhara; Eiichi Kikuchi; Yasushi Sekine

doi:10.1016/j.molcata.2013.04.033

Stable and selective perovskite catalyst for dehydrogenation of propane working with redox mechanism

Ryo Watanabe^*, Yoshiaki Hondo, Kei Mukawa, Choji Fukuhara, Eiichi Kikuchi, Yasushi Sekine

^*Corresponding author for this work

School of Advanced Science and Engineering

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

25 Citations (Scopus)

Abstract

Dehydrogenation of propane with steam was investigated using novel LaCo_xMn_1-xO₃ (0≤x≤1) perovskite-type oxide (ABO₃) catalysts. Optimization of the Co substitution ratio (x = 0.2) enabled high propylene yield and selectivity. The perovskite structure of LaCO_0.2Mn_0.8O₃ remained stable during dehydrogenation, as confirmed by XRD measurements. Dehydrogenation of propane over LaCo_0.2Mn_0.8O₃ perovskite catalyst proceeded via reduction-oxidation (redox) of the perovskite oxide; oxidative dehydrogenation of propane consumed lattice oxygen in the perovskite and the consumed lattice oxygen was regenerated by H₂O. Surface analyses conducted using XPS and XANES showed that a part of Mn⁴⁺ and Co ³⁺ in LaCo_0.2Mn_0.8O₃ was reduced to Mn³⁺ and Co²⁺ during the reaction. The LaCo _0.2Mn_0.8O₃ catalyst showed higher selectivity at the same propane conversion compared with the selectivity to propylene over an industrial CrO_x/γ-Al₂O₃ catalyst.

Original language	English
Pages (from-to)	74-84
Number of pages	11
Journal	Journal of Molecular Catalysis A: Chemical
Volume	377
DOIs	https://doi.org/10.1016/j.molcata.2013.04.033
Publication status	Published - 2013

Keywords

Dehydrogenation
Lattice oxygen
Perovskite
Propylene
Redox

ASJC Scopus subject areas

Catalysis
Process Chemistry and Technology
Physical and Theoretical Chemistry

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10.1016/j.molcata.2013.04.033

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title = "Stable and selective perovskite catalyst for dehydrogenation of propane working with redox mechanism",

abstract = "Dehydrogenation of propane with steam was investigated using novel LaCoxMn1-xO3 (0≤x≤1) perovskite-type oxide (ABO3) catalysts. Optimization of the Co substitution ratio (x = 0.2) enabled high propylene yield and selectivity. The perovskite structure of LaCO0.2Mn0.8O3 remained stable during dehydrogenation, as confirmed by XRD measurements. Dehydrogenation of propane over LaCo0.2Mn0.8O3 perovskite catalyst proceeded via reduction-oxidation (redox) of the perovskite oxide; oxidative dehydrogenation of propane consumed lattice oxygen in the perovskite and the consumed lattice oxygen was regenerated by H2O. Surface analyses conducted using XPS and XANES showed that a part of Mn4+ and Co 3+ in LaCo0.2Mn0.8O3 was reduced to Mn3+ and Co2+ during the reaction. The LaCo 0.2Mn0.8O3 catalyst showed higher selectivity at the same propane conversion compared with the selectivity to propylene over an industrial CrOx/γ-Al2O3 catalyst.",

keywords = "Dehydrogenation, Lattice oxygen, Perovskite, Propylene, Redox",

author = "Ryo Watanabe and Yoshiaki Hondo and Kei Mukawa and Choji Fukuhara and Eiichi Kikuchi and Yasushi Sekine",

year = "2013",

doi = "10.1016/j.molcata.2013.04.033",

language = "English",

volume = "377",

pages = "74--84",

journal = "Journal of Molecular Catalysis A: Chemical",

issn = "1381-1169",

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TY - JOUR

T1 - Stable and selective perovskite catalyst for dehydrogenation of propane working with redox mechanism

AU - Watanabe, Ryo

AU - Hondo, Yoshiaki

AU - Mukawa, Kei

AU - Fukuhara, Choji

AU - Kikuchi, Eiichi

AU - Sekine, Yasushi

PY - 2013

Y1 - 2013

N2 - Dehydrogenation of propane with steam was investigated using novel LaCoxMn1-xO3 (0≤x≤1) perovskite-type oxide (ABO3) catalysts. Optimization of the Co substitution ratio (x = 0.2) enabled high propylene yield and selectivity. The perovskite structure of LaCO0.2Mn0.8O3 remained stable during dehydrogenation, as confirmed by XRD measurements. Dehydrogenation of propane over LaCo0.2Mn0.8O3 perovskite catalyst proceeded via reduction-oxidation (redox) of the perovskite oxide; oxidative dehydrogenation of propane consumed lattice oxygen in the perovskite and the consumed lattice oxygen was regenerated by H2O. Surface analyses conducted using XPS and XANES showed that a part of Mn4+ and Co 3+ in LaCo0.2Mn0.8O3 was reduced to Mn3+ and Co2+ during the reaction. The LaCo 0.2Mn0.8O3 catalyst showed higher selectivity at the same propane conversion compared with the selectivity to propylene over an industrial CrOx/γ-Al2O3 catalyst.

AB - Dehydrogenation of propane with steam was investigated using novel LaCoxMn1-xO3 (0≤x≤1) perovskite-type oxide (ABO3) catalysts. Optimization of the Co substitution ratio (x = 0.2) enabled high propylene yield and selectivity. The perovskite structure of LaCO0.2Mn0.8O3 remained stable during dehydrogenation, as confirmed by XRD measurements. Dehydrogenation of propane over LaCo0.2Mn0.8O3 perovskite catalyst proceeded via reduction-oxidation (redox) of the perovskite oxide; oxidative dehydrogenation of propane consumed lattice oxygen in the perovskite and the consumed lattice oxygen was regenerated by H2O. Surface analyses conducted using XPS and XANES showed that a part of Mn4+ and Co 3+ in LaCo0.2Mn0.8O3 was reduced to Mn3+ and Co2+ during the reaction. The LaCo 0.2Mn0.8O3 catalyst showed higher selectivity at the same propane conversion compared with the selectivity to propylene over an industrial CrOx/γ-Al2O3 catalyst.

KW - Dehydrogenation

KW - Lattice oxygen

KW - Perovskite

KW - Propylene

KW - Redox

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JO - Journal of Molecular Catalysis A: Chemical

JF - Journal of Molecular Catalysis A: Chemical

ER -

Stable and selective perovskite catalyst for dehydrogenation of propane working with redox mechanism

Abstract

Keywords

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