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Gong Y, Zhong X, Ouyang R, Xu X, Fang X, Xu J, Wang X. Fabrication of Ln 2Zr 2O 7 Fluorite and LnAlO 3 Perovskite (Ln = La, Nd, Sm) Compounds to Catalyze the OCM Reaction: On the Temperature-Induced Phase Transformation and Oxygen Vacancy. Inorg Chem 2023; 62:15234-15248. [PMID: 37674288 DOI: 10.1021/acs.inorgchem.3c02392] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/08/2023]
Abstract
Through synthesizing Ln2Zr2O7 and LnAlO3 (Ln = La, Nd, Sm) catalysts, the origin of active sites for oxidative coupling of methane (OCM) on A2B2O7 fluorite and ABO3 perovskite compounds has been compared and elucidated. Ln2Zr2O7 catalysts show much better reaction performance than the respective LnAlO3 catalysts at low temperatures (500-600 °C), but the difference will be mitigated significantly above 600 °C. The reaction performance ranks in the order of La2Zr2O7 > Nd2Zr2O7 > Sm2Zr2O7 > LaAlO3 > NdAlO3 > SmAlO3. It is revealed that the unit cell free volume (Vf) plays an important role in affecting the catalytic activity, and the Ln2Zr2O7 catalysts with a disordered defect fluorite phase have inherent oxygen vacancies, which can directly activate gas-phase O2 molecules to generate OCM reactive O2- anions. However, the oxygen vacancies of LnAlO3 with a perovskite structure can only be generated by lattice distortion/transformation above 600 °C. Moreover, Ln2Zr2O7 fluorites have weaker B-O bonds than LnAlO3 perovskites, thus making it easier to generate surface vacancies as well as active O2- sites. The surface alkalinity is intimately relevant to the active oxygen species, which act together to decide the OCM performance on both types of catalysts. Indeed, this explains that LnAlO3 catalysts show much worse performance than Ln2Zr2O7 catalysts below 600 °C, which will be evidently improved at elevated temperatures due to phase transformation.
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Affiliation(s)
- Ying Gong
- Key Laboratory of Jiangxi Province for Environment and Energy Catalysis, School of Chemistry and Chemical Engineering, Nanchang University, Nanchang 330031, China
| | - Xusheng Zhong
- Key Laboratory of Jiangxi Province for Environment and Energy Catalysis, School of Chemistry and Chemical Engineering, Nanchang University, Nanchang 330031, China
| | - Rumeng Ouyang
- Key Laboratory of Jiangxi Province for Environment and Energy Catalysis, School of Chemistry and Chemical Engineering, Nanchang University, Nanchang 330031, China
| | - Xianglan Xu
- Key Laboratory of Jiangxi Province for Environment and Energy Catalysis, School of Chemistry and Chemical Engineering, Nanchang University, Nanchang 330031, China
| | - Xiuzhong Fang
- Key Laboratory of Jiangxi Province for Environment and Energy Catalysis, School of Chemistry and Chemical Engineering, Nanchang University, Nanchang 330031, China
| | - Junwei Xu
- Department of Applied Chemistry, Jiang Xi Academy of Sciences, Nanchang 330096, China
| | - Xiang Wang
- Key Laboratory of Jiangxi Province for Environment and Energy Catalysis, School of Chemistry and Chemical Engineering, Nanchang University, Nanchang 330031, China
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Oxidative Coupling of Methane for Ethylene Production: Reviewing Kinetic Modelling Approaches, Thermodynamics and Catalysts. Processes (Basel) 2021. [DOI: 10.3390/pr9122196] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Ethylene production via oxidative coupling of methane (OCM) represents an interesting route for natural gas upscaling, being the focus of intensive research worldwide. Here, OCM developments are analysed in terms of kinetic mechanisms and respective applications in chemical reactor models, discussing current challenges and directions for further developments. Furthermore, some thermodynamic aspects of the OCM reactions are also revised, providing achievable olefins yields in a wide range of operational reaction conditions. Finally, OCM catalysts are reviewed in terms of respective catalytic performances and thermal stability, providing an executive summary for future studies on OCM economic feasibility.
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The role of mass and heat transfer in the design of novel reactors for oxidative coupling of methane. Chem Eng Sci 2019. [DOI: 10.1016/j.ces.2018.09.022] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Özdemir H, Öksüzömer MAF, Ali Gürkaynak M. Studies on oxidative coupling of methane using Sm2O3-based catalysts. CHEM ENG COMMUN 2018. [DOI: 10.1080/00986445.2018.1471400] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
Affiliation(s)
- Hasan Özdemir
- Department of Chemical Engineering, Istanbul University, Istanbul, Turkey
| | | | - M. Ali Gürkaynak
- Department of Chemical Engineering, Istanbul University, Istanbul, Turkey
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Arndt S, Simon U, Kiefer K, Otremba T, Siemensmeyer K, Wollgarten M, Berthold A, Schmidt F, Görke O, Schomäcker R, Dinse KP. Li/MgO Catalysts Doped with Alio-valent Ions. Part I: Structure, Composition, and Catalytic Properties. ChemCatChem 2017. [DOI: 10.1002/cctc.201700611] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Sebastian Arndt
- Technische Universität Berlin; Institut für Chemie; Straße des 17. Juni 124 10623 Berlin Germany
| | - Ulla Simon
- Technische Universität Berlin; Institut für Werkstoffwissenschaften und -technologien, Fachgebiet Keramische Werkstoffe; Hardenbergstraße 40 10623 Berlin Germany
| | - Klaus Kiefer
- Helmholtz-Zentrum Berlin für Materialien und Energie; Lise Meitner Campus; Hahn-Meitner-Platz 1 14109 Berlin Germany
| | - Torsten Otremba
- BasCat-UniCat BASF JointLab, Eugene Paul Wigner Building; Hardenbergstraße 36 10623 Berlin Germany
| | - Konrad Siemensmeyer
- Helmholtz-Zentrum Berlin für Materialien und Energie; Lise Meitner Campus; Hahn-Meitner-Platz 1 14109 Berlin Germany
| | - Markus Wollgarten
- Helmholtz-Zentrum Berlin für Materialien und Energie; Lise Meitner Campus; Hahn-Meitner-Platz 1 14109 Berlin Germany
| | - Almuth Berthold
- Technische Universität Berlin; Institut für Werkstoffwissenschaften und -technologien, Fachgebiet Keramische Werkstoffe; Hardenbergstraße 40 10623 Berlin Germany
| | - Franziska Schmidt
- Technische Universität Berlin; Institut für Werkstoffwissenschaften und -technologien, Fachgebiet Keramische Werkstoffe; Hardenbergstraße 40 10623 Berlin Germany
| | - Oliver Görke
- Technische Universität Berlin; Institut für Werkstoffwissenschaften und -technologien, Fachgebiet Keramische Werkstoffe; Hardenbergstraße 40 10623 Berlin Germany
| | - Reinhard Schomäcker
- Technische Universität Berlin; Institut für Chemie; Straße des 17. Juni 124 10623 Berlin Germany
| | - Klaus-Peter Dinse
- Freie Universität Berlin, Fachbereich Physik; Arnimallee 14 14195 Berlin Germany), Fax: (+49) 308-385-6139
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Simon U, Alarcón Villaseca S, Shang H, Levchenko SV, Arndt S, Epping JD, Görke O, Scheffler M, Schomäcker R, van Tol J, Ozarowski A, Dinse KP. Li/MgO Catalysts Doped with Alio-valent Ions. Part II: Local Topology Unraveled by EPR/NMR and DFT Modeling. ChemCatChem 2017. [DOI: 10.1002/cctc.201700610] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Ulla Simon
- Technische Universität Berlin; Institut für Werkstoffwissenschaften und -technologien, Fachgebiet Keramische Werkstoffe; Hardenbergstraße 40 10623 Berlin Germany
| | | | - Honghui Shang
- Fritz-Haber-Institut der Max Planck Gesellschaft; Theory Department; Faradayweg 4-6 14195 Berlin Germany
| | - Sergey V. Levchenko
- Fritz-Haber-Institut der Max Planck Gesellschaft; Theory Department; Faradayweg 4-6 14195 Berlin Germany
| | - Sebastian Arndt
- Technische Universität Berlin; Institut für Chemie; Straße des 17.Juni 124 10623 Berlin Germany
| | - Jan D. Epping
- Technische Universität Berlin; Institut für Chemie; Straße des 17.Juni 135 10623 Berlin Germany
| | - Oliver Görke
- Technische Universität Berlin; Institut für Werkstoffwissenschaften und -technologien, Fachgebiet Keramische Werkstoffe; Hardenbergstraße 40 10623 Berlin Germany
| | - Matthias Scheffler
- Fritz-Haber-Institut der Max Planck Gesellschaft; Theory Department; Faradayweg 4-6 14195 Berlin Germany
| | - Reinhard Schomäcker
- Technische Universität Berlin; Institut für Chemie; Straße des 17.Juni 124 10623 Berlin Germany
| | - Johan van Tol
- National High Magnetic Field Laboratory; 1800 E. Paul Dirac Dr. Tallahassee FL 32310 USA
| | - Andrew Ozarowski
- National High Magnetic Field Laboratory; 1800 E. Paul Dirac Dr. Tallahassee FL 32310 USA
| | - Klaus-Peter Dinse
- Freie Universität Berlin; Fachbereich Physik; Arnimallee 14 14195 Berlin Germany
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Penteado A, Esche E, Salerno D, Godini HR, Wozny G. Design and Assessment of a Membrane and Absorption Based Carbon Dioxide Removal Process for Oxidative Coupling of Methane. Ind Eng Chem Res 2016. [DOI: 10.1021/acs.iecr.5b04910] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Alberto Penteado
- Process
Dynamics and Operations
Group, Technische Universtität Berlin, Sekretariat KWT-9, Straße des
17, Juni 135, D-10623 Berlin, Germany
| | - Erik Esche
- Process
Dynamics and Operations
Group, Technische Universtität Berlin, Sekretariat KWT-9, Straße des
17, Juni 135, D-10623 Berlin, Germany
| | - Daniel Salerno
- Process
Dynamics and Operations
Group, Technische Universtität Berlin, Sekretariat KWT-9, Straße des
17, Juni 135, D-10623 Berlin, Germany
| | - Hamid Reza Godini
- Process
Dynamics and Operations
Group, Technische Universtität Berlin, Sekretariat KWT-9, Straße des
17, Juni 135, D-10623 Berlin, Germany
| | - Günter Wozny
- Process
Dynamics and Operations
Group, Technische Universtität Berlin, Sekretariat KWT-9, Straße des
17, Juni 135, D-10623 Berlin, Germany
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Galadima A, Muraza O. Revisiting the oxidative coupling of methane to ethylene in the golden period of shale gas: A review. J IND ENG CHEM 2016. [DOI: 10.1016/j.jiec.2016.03.027] [Citation(s) in RCA: 116] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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Abstract
AbstractResearchers normally consider MgO as a promising high-surface-area heterogeneous catalyst support, additive, and promoter for many kinds of chemical reactions due to its certain properties, including stoichiometry and composition, cation valence, redox properties, acid-base character, and crystal and electronic structure. The presence of MgO as a support catalyst also modifies the electronic state of the overall catalytic performance by electron transfer between the native catalyst and MgO as support. The influence is clarified by alteration of acid-base properties of the catalyst-supported MgO. Meanwhile, the method, chemical composition, and condition in the preparation of MgO are the important factors affecting its surface and catalytic properties. Therefore, MgO with a high surface area and nanocrystalline structure has encouraging applications for some reactions, including as dry reforming, dehydrohalogenation, oxidative dehydrogenation of butane, nonoxidative dehydrogenation of ethylbenzene, decomposition of CCl
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Rhodes CJ. The Role of ESR Spectroscopy in Advancing Catalytic Science: Some Recent Developments. PROGRESS IN REACTION KINETICS AND MECHANISM 2015. [DOI: 10.3184/146867815x14297237081532] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Recent progress is surveyed in regard to the importance of molecular species containing unpaired electrons in catalytic systems, as revealed using ESR spectroscopy. The review begins with studies of enzymes and their role directly in biological systems, and then discusses investigations of various artificially created catalysts with potential human and environmental significance, including zeolites. Among the specific types of catalytic media considered are those for photocatalysis, water splitting, the degradation of environmental pollutants, hydrocarbon conversions, fuel cells, ionic liquids and sensor devices employing graphene. Studies of muonium-labelled radicals in zeolites are also reviewed, as a means for determining the dynamics of transient radicals in these nanoporous materials.
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Galadima A, Muraza O. Catalytic Upgrading of Bioethanol to Fuel Grade Biobutanol: A Review. Ind Eng Chem Res 2015. [DOI: 10.1021/acs.iecr.5b01443] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Ahmad Galadima
- Center of Research Excellence in Nanotechnology, ‡Chemical Engineering Department, King Fahd University of Petroleum & Minerals, Dhahran 31261, Saudi Arabia
| | - Oki Muraza
- Center of Research Excellence in Nanotechnology, ‡Chemical Engineering Department, King Fahd University of Petroleum & Minerals, Dhahran 31261, Saudi Arabia
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13
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Abstract
A heterogeneous catalyst is a functional material that continually creates active sites with its reactants under reaction conditions. These sites change the rates of chemical reactions of the reactants localized on them without changing the thermodynamic equilibrium between the materials.
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Affiliation(s)
- Robert Schlögl
- Fritz Haber Institute of the Max Planck Society, Faradayweg 4-6, 14195 Berlin (Germany) http://www.fhi-berlin.mpg.de http://www.cec.mpg.de; Max Planck Institute for Chemical Energy Conversion, Stiftstrasse 34-36, 45470 Mülheim a.d. Ruhr (Germany).
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Elkins TW, Neumann B, Bäumer M, Hagelin-Weaver HE. Effects of Li Doping on MgO-Supported Sm2O3 and TbOx Catalysts in the Oxidative Coupling of Methane. ACS Catal 2014. [DOI: 10.1021/cs500138j] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Trenton W. Elkins
- Department
of Chemical Engineering, University of Florida, Gainesville, Florida 32611, United States
| | - Björn Neumann
- Institute of Applied and Physical Chemistry & Center for Environmental Research and Sustainable Technology, University Bremen, Leobener Strasse UFT, 28359 Bremen, Germany
| | - Marcus Bäumer
- Institute of Applied and Physical Chemistry & Center for Environmental Research and Sustainable Technology, University Bremen, Leobener Strasse UFT, 28359 Bremen, Germany
| | - Helena E. Hagelin-Weaver
- Department
of Chemical Engineering, University of Florida, Gainesville, Florida 32611, United States
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Abstract
An overview is provided of the importance of molecular species containing unpaired electrons in catalytic systems, as revealed using ESR spectroscopy. The review aims to demonstrate the considerable extent of scientific progress that has been made in this broad topic during the past few decades. Studies of catalytically active surfaces, including zeolites, are surveyed, and the detection of radical species, formed as intermediates in their reactions, using matrix isolation and spin-trapping techniques. Radical cation formation in zeolites is discussed, and the employment of muon spin rotation and relaxation techniques to study the mobility of labelled radicals in various porous and catalytic media. Among the specific types of catalytic media considered are those for photocatalysis, water splitting, degradation of environmental pollutants, hydrocarbon conversions, fuel cells and sensor devices employing graphene. The review concludes with recent developments in the study of enzymes and their reactions, using ESR-based methods.
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