Catalyst supports based on ZnO-ZnAl2O4 nanocomposites with enhanced selectivity and coking resistance in isobutane dehydrogenation

Anna N. Matveyeva; Shamil O. Omarov; Alexey V. Nashchekin; Vadim I. Popkov; Dmitry Yu Murzin

doi:10.1039/d2dt02088b

Catalyst supports based on ZnO-ZnAl₂O₄ nanocomposites with enhanced selectivity and coking resistance in isobutane dehydrogenation

Anna N. Matveyeva^*, Shamil O. Omarov, Alexey V. Nashchekin, Vadim I. Popkov, Dmitry Yu Murzin^*

^*Corresponding author for this work

Laboratory of Industrial Chemistry and Reaction Engineering

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

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Abstract

Development of coking resistant supports and catalysts for hydrocarbons conversion is challenging, especially when using such acidic materials as alumina. Apparently, this problem can be mitigated by using spinels that are less acidic, being, however, thermally stable. In this study, a series of ZnO-ZnAl₂O₄ nanocomposites with different ZnO loading were prepared by urotropine-nitrate combustion synthesis to be used as supports for isobutane dehydrogenation catalysts. The nanocomposites were characterized by XRD, SEM, N₂-physisorption analysis, EDS, H₂-TPR, TPD of NH₃ and tested in isobutane dehydrogenation. Spinels with small amounts of ZnO displayed higher acidity and specific surface areas than samples with a higher ZnO content (30-40 mol%). At the same time, the maximum activity and the lowest selectivity to by-products (CH₄ and C₃H₆) after 10 min of the reaction were observed for the nanocomposite containing 20 mol% of ZnO. The obtained nanocomposites have demonstrated better resistance to coking compared to commercial alumina.

Original language	English
Pages (from-to)	12213-12224
Number of pages	12
Journal	Dalton Transactions
Volume	51
Issue number	32
DOIs	https://doi.org/10.1039/d2dt02088b
Publication status	Published - 22 Jul 2022
MoE publication type	A1 Journal article-refereed

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10.1039/d2dt02088b

Manuscript REVISEDAccepted author manuscript, 3.47 MBLicence: Publisher rights policy

https://urn.fi/URN:NBN:fi-fe2023080192769

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@article{5081f7e887c04234a74870fae6f89c44,

title = "Catalyst supports based on ZnO-ZnAl2O4 nanocomposites with enhanced selectivity and coking resistance in isobutane dehydrogenation",

abstract = "Development of coking resistant supports and catalysts for hydrocarbons conversion is challenging, especially when using such acidic materials as alumina. Apparently, this problem can be mitigated by using spinels that are less acidic, being, however, thermally stable. In this study, a series of ZnO-ZnAl2O4 nanocomposites with different ZnO loading were prepared by urotropine-nitrate combustion synthesis to be used as supports for isobutane dehydrogenation catalysts. The nanocomposites were characterized by XRD, SEM, N2-physisorption analysis, EDS, H2-TPR, TPD of NH3 and tested in isobutane dehydrogenation. Spinels with small amounts of ZnO displayed higher acidity and specific surface areas than samples with a higher ZnO content (30-40 mol%). At the same time, the maximum activity and the lowest selectivity to by-products (CH4 and C3H6) after 10 min of the reaction were observed for the nanocomposite containing 20 mol% of ZnO. The obtained nanocomposites have demonstrated better resistance to coking compared to commercial alumina.",

author = "Matveyeva, {Anna N.} and Omarov, {Shamil O.} and Nashchekin, {Alexey V.} and Popkov, {Vadim I.} and Murzin, {Dmitry Yu}",

note = "Funding Information: The authors are grateful to research assistant Kirill Martinson for EDS analysis performed at the facilities of the Engineering Centre of St Petersburg State Institute of Technology (Technical University); research assistant Maria Chebanenko for N2 physisorption measurements at the Laboratory of New Inorganic Materials of Ioffe Institute. Publisher Copyright: {\textcopyright} 2022 The Royal Society of Chemistry.",

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doi = "10.1039/d2dt02088b",

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volume = "51",

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T1 - Catalyst supports based on ZnO-ZnAl2O4 nanocomposites with enhanced selectivity and coking resistance in isobutane dehydrogenation

AU - Matveyeva, Anna N.

AU - Omarov, Shamil O.

AU - Nashchekin, Alexey V.

AU - Popkov, Vadim I.

AU - Murzin, Dmitry Yu

N1 - Funding Information: The authors are grateful to research assistant Kirill Martinson for EDS analysis performed at the facilities of the Engineering Centre of St Petersburg State Institute of Technology (Technical University); research assistant Maria Chebanenko for N2 physisorption measurements at the Laboratory of New Inorganic Materials of Ioffe Institute. Publisher Copyright: © 2022 The Royal Society of Chemistry.

PY - 2022/7/22

Y1 - 2022/7/22

N2 - Development of coking resistant supports and catalysts for hydrocarbons conversion is challenging, especially when using such acidic materials as alumina. Apparently, this problem can be mitigated by using spinels that are less acidic, being, however, thermally stable. In this study, a series of ZnO-ZnAl2O4 nanocomposites with different ZnO loading were prepared by urotropine-nitrate combustion synthesis to be used as supports for isobutane dehydrogenation catalysts. The nanocomposites were characterized by XRD, SEM, N2-physisorption analysis, EDS, H2-TPR, TPD of NH3 and tested in isobutane dehydrogenation. Spinels with small amounts of ZnO displayed higher acidity and specific surface areas than samples with a higher ZnO content (30-40 mol%). At the same time, the maximum activity and the lowest selectivity to by-products (CH4 and C3H6) after 10 min of the reaction were observed for the nanocomposite containing 20 mol% of ZnO. The obtained nanocomposites have demonstrated better resistance to coking compared to commercial alumina.

AB - Development of coking resistant supports and catalysts for hydrocarbons conversion is challenging, especially when using such acidic materials as alumina. Apparently, this problem can be mitigated by using spinels that are less acidic, being, however, thermally stable. In this study, a series of ZnO-ZnAl2O4 nanocomposites with different ZnO loading were prepared by urotropine-nitrate combustion synthesis to be used as supports for isobutane dehydrogenation catalysts. The nanocomposites were characterized by XRD, SEM, N2-physisorption analysis, EDS, H2-TPR, TPD of NH3 and tested in isobutane dehydrogenation. Spinels with small amounts of ZnO displayed higher acidity and specific surface areas than samples with a higher ZnO content (30-40 mol%). At the same time, the maximum activity and the lowest selectivity to by-products (CH4 and C3H6) after 10 min of the reaction were observed for the nanocomposite containing 20 mol% of ZnO. The obtained nanocomposites have demonstrated better resistance to coking compared to commercial alumina.

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U2 - 10.1039/d2dt02088b

DO - 10.1039/d2dt02088b

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AN - SCOPUS:85135313785

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VL - 51

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JO - Dalton Transactions

JF - Dalton Transactions

IS - 32

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Catalyst supports based on ZnO-ZnAl₂O₄ nanocomposites with enhanced selectivity and coking resistance in isobutane dehydrogenation

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