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van Steen E, Guo J, Hytoolakhan Lal Mahomed N, Leteba GM, Mahlaba SVL. Selective, Aerobic Oxidation of Methane to Formaldehyde over Platinum ‐ a Perspective. ChemCatChem 2023. [DOI: 10.1002/cctc.202201238] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/31/2023]
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Increasing the Efficiency of Optimized V-SBA-15 Catalysts in the Selective Oxidation of Methane to Formaldehyde by Artificial Neural Network Modelling. Catalysts 2020. [DOI: 10.3390/catal10121411] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
The present study investigates the possibility of improving the selective oxidation of methane to formaldehyde over V-SBA-15 catalysts in two different ways. In a classical approach of catalyst optimization, the in situ synthesis of V-SBA-15 catalysts was optimized with regard to the applied pH value. Among the set of catalysts synthesized, a higher amount of incorporated vanadium, a higher content of polymeric VOx species as well as a less ordered structure of the support material were observed by increasing the pH values from 2.0 to 3.0. An optimum in performance during the selective oxidation of methane to formaldehyde with respect to activity and selectivity was found over V-SBA-15 prepared at a pH value of 2.5. With this knowledge, we have now evaluated the possibilities of reaction control using this catalyst. Specifically, artificial neural network modelling was applied after the collection of 232 training samples for obtaining insight into the influence of different reaction parameters (temperature; gas hourly space velocity (GHSV); and concentration of O2, N2 and H2O) onto methane conversion and selectivity towards formaldehyde. This optimization of reaction conditions resulted in an outstanding high space-time yield of 13.6 kgCH2O∙kgcat∙h−1.
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Combination of Chemo- and Biocatalysis: Conversion of Biomethane to Methanol and Formic Acid. APPLIED SCIENCES-BASEL 2019. [DOI: 10.3390/app9142798] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
In the present day, methanol is mainly produced from methane via reforming processes, but research focuses on alternative production routes. Herein, we present a chemo-/biocatalytic oxidation cascade as a novel process to currently available methods. Starting from synthetic biogas, in the first step methane was oxidized to formaldehyde over a mesoporous VOx/SBA-15 catalyst. In the second step, the produced formaldehyde was disproportionated enzymatically towards methanol and formic acid in equimolar ratio by formaldehyde dismutase (FDM) obtained from Pseudomonas putida. Two processing routes were demonstrated: (a) batch wise operation using free formaldehyde dismutase after accumulating formaldehyde from the first step and (b) continuous operation with immobilized enzymes. Remarkably, the chemo-/biocatalytic oxidation cascades generate methanol in much higher productivity compared to methane monooxygenase (MMO) which, however, directly converts methane. Moreover, production steps for the generation of formic acid were reduced from four to two stages.
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Fait MJG, Ricci A, Holena M, Rabeah J, Pohl MM, Linke D, Kondratenko EV. Understanding trends in methane oxidation to formaldehyde: statistical analysis of literature data and based hereon experiments. Catal Sci Technol 2019. [DOI: 10.1039/c9cy01055f] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A regression tree analysis on selective oxidation of methane to methanol/formaldehyde was applied to identify fundamentals affecting catalyst performance. The electronegativity correlates with methane activation energy and formaldehyde selectivity.
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Affiliation(s)
- M. J. G. Fait
- Leibniz-Institut für Katalyse e.V
- D-18059 Rostock
- Germany
| | - A. Ricci
- Leibniz-Institut für Katalyse e.V
- D-18059 Rostock
- Germany
| | - M. Holena
- Leibniz-Institut für Katalyse e.V
- D-18059 Rostock
- Germany
| | - J. Rabeah
- Leibniz-Institut für Katalyse e.V
- D-18059 Rostock
- Germany
| | - M.-M. Pohl
- Leibniz-Institut für Katalyse e.V
- D-18059 Rostock
- Germany
| | - D. Linke
- Leibniz-Institut für Katalyse e.V
- D-18059 Rostock
- Germany
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Influence of V-sources on the catalytic performance of VMCM-41 in the selective oxidation of methane to formaldehyde. CATAL COMMUN 2018. [DOI: 10.1016/j.catcom.2017.09.004] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
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Pinaeva LG, Noskov AS, Parmon VN. Prospects for the direct catalytic conversion of methane into useful chemical products. CATALYSIS IN INDUSTRY 2017. [DOI: 10.1134/s2070050417040067] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Kondratenko EV, Peppel T, Seeburg D, Kondratenko VA, Kalevaru N, Martin A, Wohlrab S. Methane conversion into different hydrocarbons or oxygenates: current status and future perspectives in catalyst development and reactor operation. Catal Sci Technol 2017. [DOI: 10.1039/c6cy01879c] [Citation(s) in RCA: 161] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
This Perspective highlights recent developments in methane conversion into different hydrocarbons and C1-oxygenates. Our analysis identified possible directions for further research to bring the above approaches to a commercial level.
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Affiliation(s)
| | - Tim Peppel
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock
- D-18059 Rostock
- Germany
| | - Dominik Seeburg
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock
- D-18059 Rostock
- Germany
| | - Vita A. Kondratenko
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock
- D-18059 Rostock
- Germany
| | - Narayana Kalevaru
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock
- D-18059 Rostock
- Germany
| | - Andreas Martin
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock
- D-18059 Rostock
- Germany
| | - Sebastian Wohlrab
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock
- D-18059 Rostock
- Germany
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8
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Impact of support pore structure and morphology on catalyst performance of VO x /SBA-15 for selective methane oxidation. Catal Today 2016. [DOI: 10.1016/j.cattod.2016.02.043] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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9
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Ding XL, Wang D, Wu XN, Li ZY, Zhao YX, He SG. High reactivity of nanosized niobium oxide cluster cations in methane activation: A comparison with vanadium oxides. J Chem Phys 2015; 143:124312. [PMID: 26429016 DOI: 10.1063/1.4931972] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
The reactions between methane and niobium oxide cluster cations were studied and compared to those employing vanadium oxides. Hydrogen atom abstraction (HAA) reactions were identified over stoichiometric (Nb2O5)N(+) clusters for N as large as 14 with a time-of-flight mass spectrometer. The reactivity of (Nb2O5)N(+) clusters decreases as the N increases, and it is higher than that of (V 2O5)N(+) for N ≥ 4. Theoretical studies were conducted on (Nb2O5)N(+) (N = 2-6) by density functional calculations. HAA reactions on these clusters are all favorable thermodynamically and kinetically. The difference of the reactivity with respect to the cluster size and metal type (Nb vs V) was attributed to thermodynamics, kinetics, the electron capture ability, and the distribution of the unpaired spin density. Nanosized Nb oxide clusters show higher HAA reactivity than V oxides, indicating that niobia may serve as promising catalysts for practical methane conversion.
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Affiliation(s)
- Xun-Lei Ding
- Department of Mathematics and Physics, North China Electric Power University, Beinong Road 2, Huilongguan, Beijing 102206, People's Republic of China
| | - Dan Wang
- Department of Mathematics and Physics, North China Electric Power University, Beinong Road 2, Huilongguan, Beijing 102206, People's Republic of China
| | - Xiao-Nan Wu
- Beijing National Laboratory for Molecular Sciences, State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, People's Republic of China
| | - Zi-Yu Li
- Beijing National Laboratory for Molecular Sciences, State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, People's Republic of China
| | - Yan-Xia Zhao
- Beijing National Laboratory for Molecular Sciences, State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, People's Republic of China
| | - Sheng-Gui He
- Beijing National Laboratory for Molecular Sciences, State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, People's Republic of China
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Physicochemical properties of Cu loaded onto core–shell Al-MCM-41: Effect of loading methods. Colloids Surf A Physicochem Eng Asp 2015. [DOI: 10.1016/j.colsurfa.2014.11.048] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Wallis P, Schönborn E, Kalevaru VN, Martin A, Wohlrab S. Enhanced formaldehyde selectivity in catalytic methane oxidation by vanadia on Ti-doped SBA-15. RSC Adv 2015. [DOI: 10.1039/c5ra10624a] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
During catalytic methane oxidation V/Ti-SBA-15 showed an improved selectivity towards formaldehyde over all conversions compared to V/SBA-15.
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Affiliation(s)
- P. Wallis
- Leibniz Institute for Catalysis at the University of Rostock
- D-18059 Rostock
- Germany
| | - E. Schönborn
- Leibniz Institute for Catalysis at the University of Rostock
- D-18059 Rostock
- Germany
| | - V. N. Kalevaru
- Leibniz Institute for Catalysis at the University of Rostock
- D-18059 Rostock
- Germany
| | - A. Martin
- Leibniz Institute for Catalysis at the University of Rostock
- D-18059 Rostock
- Germany
| | - S. Wohlrab
- Leibniz Institute for Catalysis at the University of Rostock
- D-18059 Rostock
- Germany
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Qiao A, Kalevaru VN, Radnik J, Düvel A, Heitjans P, Kumar ASH, Prasad PSS, Lingaiah N, Martin A. Oxidative Dehydrogenation of Ethane to Ethylene over V2O5/Al2O3 Catalysts: Effect of Source of Alumina on the Catalytic Performance. Ind Eng Chem Res 2014. [DOI: 10.1021/ie5008344] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- A. Qiao
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock, Albert-Einstein-Str. 29a, D-18059 Rostock, Germany
| | - V. N. Kalevaru
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock, Albert-Einstein-Str. 29a, D-18059 Rostock, Germany
| | - J. Radnik
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock, Albert-Einstein-Str. 29a, D-18059 Rostock, Germany
| | - A. Düvel
- Leibniz Universität Hannover, Institut für
Physikalische Chemie und Elektrochemie and ZFM - Zentrum für
Festkörperchemie und Neue Materialien, Callinstr. 3, D-30167 Hannover, Germany
| | - P. Heitjans
- Leibniz Universität Hannover, Institut für
Physikalische Chemie und Elektrochemie and ZFM - Zentrum für
Festkörperchemie und Neue Materialien, Callinstr. 3, D-30167 Hannover, Germany
| | | | - P. S. Sai Prasad
- Indian Institute of Chemical Technology, Hyderabad - 500 007, India
| | - N. Lingaiah
- Indian Institute of Chemical Technology, Hyderabad - 500 007, India
| | - A. Martin
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock, Albert-Einstein-Str. 29a, D-18059 Rostock, Germany
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